no communication with pcm

Now these 2 problems combined would lead to think that there is some electrical connection problem with the PCM. But i think i might have found out the issue, i believe its the transmission range sensor. This video will solve your Dodge Ram 1500 PCM problems/No BUS/No communication issues!Welcome to Codys Auto Diagnostics and Programming on YouTube!This is Part 1 of our Dodge Ram Truck with computer/PCM/ECM problems with no communication diagnostic video. Problems may also occur if vibration causes micro-cracks in the unit. Pin 16 is the positive voltage side being supplied to the ECM. About Us - Problems may also occur if vibration causes micro-cracks in the unit. This DTC sets when the PCM does not receive the TCM message within the defined amount of time. Even tried with connector on transmission. Found fault code u0100 lost communication with ecm. Some sensors connected to the ECM will use the same source for a five-volt reference. PT 1 - YouTube. Because thrills like these dont happen often. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. Join to talk about performance, specs, reviews and more! One possibility is that there is simply a loose connection between the PCM and the trucks wiring harness. This can be performed by using the OBDII connector. Read our full disclaimer here. One othe thing if the pcm doesn't communicate then it may be a can/bus problem which you'll need a pro scanner to see where the problem lies it may be the wiring or a There are a few possible reasons why your PCM is not communicating with your truck, and well go over them here. Web2011 GMC ACADIA 3.6L has a no crank no start problem. The February Digital Edition Is Free To Download, Read, The January Digital Edition Is Available To Download, Read, Read Your Copy of Decembers ShopOwner Now, Engineering behind chassis: high and low-friction parts, Different Nameplates, Different Expectations, Alternator Testing For No Charge Conditions. EXPERT. Guides & features that can help you extend the service life of your car delivered straight to your inbox. If you buy one, drive it hard. The solder that connects the components to the circuit board can also fail. Oct 14, 2013 #2 Patrick Feeley Member Joined No Communication PCM/ECM replacement. Pin 16 is the positive voltage side being supplied to the ECM. I tried disconnecting the battery but no luck. Archive - Scan tool will not communicate with pcm. 94 Dodge 1500 2wd powered by a 2005 Cummins 3.9 4BTAA 27mpg 95 Dodge 2500 4x4 boost elbow (35psi) #10 fuel plate 99 2500 4x4 edge juice with attitude. These are likely two separate problems. I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. One othe thing if the pcm doesn't communicate then it may be a can/bus problem which you'll need a pro scanner to see where the problem lies it may be the wiring or a This can be performed by using the OBDII connector. At each end of the CAN bus, there are terminating resistors; theyre called terminating resistors because they terminate communication signals, giving the bus a looped design. anybody have some advice on what we need to do? Description: The powertrain control module (PCM) continuously monitors the controller area network (CAN) for messages from the TCM. I don't know what went wrong. Apr 15, 2014. did you check the fuses. Put a cab and most parts from a donor truck including all wiring, sensors, injectors, turbo, pcm, IDM etc. Thursday, May 4th, 2017 AT 6:05 AM. Maybe one got bumped. Do you mean ECM? You are using an out of date browser. Second, communication circuits allow the module to communicate on the networks of the vehicle with other modules. It is also recommended that you check technical service bulletins (TSBs) about this problem code to see if your vehicle is affected and how the matter should be addressed. This video made for entertainment purposes. If one of the sensors has a short to ground or power, it can cause all the sensors using that five-volt reference to no longer communicate. Thanks in advance, Please call customer service with your order number so that we can ensure you got the right part 1-866-529-0412, Hi many is roodly I have an Chevy Cruze 2012 I change only the steering look my no crank I need your help. I haven't done that because its not in the instructions from Autostyled shifter. Richard McCuistian, ASE Certified Master Automobile Technician, U0140 Code: Lost Communication With Body Control Module, U1000 Code: Manufacturer-Specific Network Communication Code, U0073 Code: Control Module Communication Bus A Off, U0100 Code: Lost Communication with ECM/PCM A, Honda Tune-Up Costs and Maintenance: What You Need to Know, Aries: Claim a $75 Rebate on select Aries ActionTrac Kit. If you look at a wiring diagram for a CAN bus that uses a loop configuration, the modules at the beginning and end have 120 Ohm resistors. Today we look at this Dodge Ram Truck, it was brought in and upon initial diagnostics I saw No BUS on the dash display, which lead me to believe that there was no communication with the computer/PCM/ECM .I tested this no communication issue on this Dodge Ram Trucks computer/PCM/ECM , completing a power and ground test.I verified PCI BUS signal to the computer/PCM/ECM , and this Dodge Ram Truck will be needing a computer/PCM/ECM , and to be VIN programmed.TechAuthority isnt needed for this process, and computer/PCM/ECM programming can be handled with a scan tool.This diagnostic process works with many vehicles, such as no bus Dodge Durango, and even for no bus on Dodge Dakota and can help test a PCM failure.Equipment used today while making this video:Drew Technologies CarDAQ-Plus 3 All Makes J2534 Reprogramming Tool - J2534 https://amzn.to/3ESxBoJSnap On Tools Zeus Diagnostic Scan Tool - https://shop.snapon.com/product/ZEUS-Intelligent-Diagnostics-and-Information-System/ZEUS-Intelligent-Diagnostics-and-Information-System/EEMS342WSnap On Tools Digital Multimeter - https://shop.snapon.com/product/Automotive-Digital-Multimeters/Digital-Hybrid-Multimeter-CAT-III-1%2C000-V%2C-CAT-IV-600-V-Safety-Rating/EEDM604EAESWave uScope Master Kit- https://www.aeswave.com/uScope-Master-Kit-p9622.htmlAESWave uTest Advanced Terminal Test Kit - https://www.aeswave.com/uTest-Advanced-Terminal-Test-Kit-p9748.htmlMopar TechAuthority - https://www.techauthority.com/If the video was helpful, remember to give it a \"thumbs up\" and consider subscribing.Who is Codys Auto Diagnostics \u0026 Programming LLC?I was an automotive technician for the last 17 years and hold ASE master with A9 light duty diesel, L1 advanced drivability, and L3 hybrid certifications. The new PCM works fine. Did you ever find out what the problem was? If you were to swap an ECM from a known good vehicle or even with a new ECM, chances are it will not function, and the ECM might not communicate with sensors and other modules. +1. Terms of Service - Check the fuse box (Power Panel), it might be the reason why PCM isnt able to receive power as well as communicate. What could be the problem? Problem solved! Do you mean ECM? This is because the software that is unique to the vehicle is not programmed or flashed into the modules memory when it comes from your parts supplier. There are two grounds on the frame rail too.

Also, an injector may not pulse, or an ignition coil might not fire. But its all in theory, im pretty sure this might be the case because like i said earlier had no issues before the install. If you experience a combination of the signs below, you might be dealing with the U0101 trouble code: If the U0101 code is caused by an intermittent short circuit on the CAN bus or in the TCM itself, you may have the code without noticeable symptoms other than possibly a MIL light. The other type of communication issue could be with a sensor or actuator. Dodge Ram 1500 PCM problems No BUS FIXED! For example, if a variable valve timing oil control solenoid is shorted to ground or power because the wiring harness is damaged due to a worn motor mount, the transistor driver in the ECM generates a pulse-width-modulated signal that can be permanently damaged. Please register or login to enable Dark Mode. The technical service bulletin number 08-07-30-021G released in March 2012 details repair instructions for a combination of communication and network DTCs including the U0101 code. TEST 4: First, you have the circuits and components that process and compute. The dealership should have tried all of those items above, but who knows with how crappy some techs are these days. Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. I have the auto enginuity scan tool for the 7.3 and theres no communication, dash lights arent on and the IDM relay is clicking intermittently. No Communication PCM/ECM replacement.

OBDII connectors serve as the main communication point between the technician and the vehicle. Code U0101 indicates a communication problem that could be caused by anything from a bad module to a data network problem. This DTC sets when the PCM does not receive the TCM message within the defined amount of time. If a module like an ECM cant communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. not sure if its a wiring problem or if its the PCM itself. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. Tahoe, Suburban, Yukon, Avalanche, Silverado, Sierra, H2, & Escalade, (ALWAYS Apply Liquid Electrical Tape on ALL Wire Punctures! Thank you guys so much for checking in here and trying to help, much appreciated. Cookie Policy - attempted installing the tuner and the tuner cannot communicate with the PCM to tune it. So that needs to be checked. Pin 4 is chassis ground and is a ground taken from the body of the vehicle. Did you replace just the ignition lock cylinder (the tumbler portion) and nothing else? There are even high speed and low speed CAN busses configured in different ways on different vehicles most good service manual information will have a network map, that shows which modules are connected to which bus, so if several modules are down and theyre all on one bus, that information is used by the technician to determine if the problem is module or bus-related. Get exclusive CarParts.com deals and coupons straight to your inbox! With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM.

In many instances, the modules use a protocol called controller area network (CAN) to communicate, so the network is called the CAN bus. This can be performed by using the OBDII connector. What Happens When Rack and Pinion Goes Out? I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. i tried hooking up our genesis scanner to see if it would communicate. This short guide will provide some understanding on U0101. When you purchase through links on our site, we may earn an affiliate commission, which supports our community.

If the problem was only with the scanner connection, the jeep would at least run normally. S If a module like an ECM cant communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. For a better experience, please enable JavaScript in your browser before proceeding. JavaScript is disabled. Possible Causes: Damaged CAN communication bus circuit. You can try to do the fix yourself, but youll need help from online guides or repair manuals. Apr 15, 2014. did you check the fuses. Thank you for signing up. what can i do to fix it? EXPERT. i tried hooking up our genesis scanner to see if it would communicate. With any communication network, the resistance in the circuit, resulting voltage and circuit condition can determine if information is being communicated with other modules. I'd check connections. Below is a helpful video resource on how you can better understand the U0101 code: Fixing the U0101 code could get a little tricky since theres no single fix that resolves the code.

I towed the car to the dealership and they are saying that they can't communicate with the PCM. When leaving a Chrysler PT Cruiser parked for an extended period of time, it could fail to start. I have the auto enginuity scan tool for the 7.3 and theres no communication, dash lights arent on and the IDM relay is clicking intermittently. Do you mean ECM? WebA PCM can fail due to several factors, such as a short circuit, corrosion, or thermal stress. This module typically receives some of its input from dedicated sensors within the transmission, but some of the information necessary for proper transmission function must be sent to the TCM by the Engine Control Module (ECM) over the CAN bus. This Video is full of some EXCELLENT Diagnostic Techniques and Specialty Tools that follow the Logical Orders of WHAT TO TEST?.1,st, 2nd, 3rdEtc., when Investigating a No Communication Problem with the ECU-PCM.Ive isolated and documented all of the critical information shown in this Video that follow the Proper https://www.amazon.com/s?k=dlc+breakout+tool&ref=nb_sb_noss&tag=elightbars-20. Can You Drive Without a Catalytic Converter? 3 Answers No communication with pcm on 95 buick lesabre 3.8 have replaced pcm checked powers and grounds any ideas would be appreciated Replaced pcm and checked powers grounds and fuses checked aldl and found no class 2 data wire (purple wire) Posted by Travis Mathews on Jan 23, 2015 2 more comments David An Denise WebConnect the positive DMM lead to the class 2 Serial Data pin and the negative DMM lead to either pin 4 or pin 5 or a known good ground. Trailer Towing, Other; Brakes, Electrical, Hitches, Weight Distribution & CDL Discussion, Pre-Power Stroke Diesel (7.3L IDI & 6.9L), Bio-diesel, Propane & Alternative Diesel Engine Fuels, Explorer, Sport Trac, Mountaineer & Aviator, 1987 - 1996 F150 & Larger F-Series Trucks, 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks, 1973 - 1979 F-100 & Larger F-Series Trucks, 1967 - 1972 F-100 & Larger F-Series Trucks, 1961 - 1966 F-100 & Larger F-Series Trucks, 1957 - 1960 F100 & Larger F-Series Trucks, 1948 - 1956 F1, F100 & Larger F-Series Trucks, 1968-Present E-Series Van/Cutaway/Chassis, Nite, Nascar & Other Limited Edition Ford Trucks, Supercharger, Turbocharger, Nitrous Oxide & Water/Methanol Injection, Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W), Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460), FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428), 335 Series- 5.8/351M, 6.6/400, 351 Cleveland, Y-Block V8 (239, 272, 292, 312, 317, 341, 368), Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics, Bed Covers, Tonneau covers, Toppers/Canopies & Bed liners, Brakes, Steering, Suspension, Tires, & Wheels, Clutch, Transmission, Differential, Axle & Transfer Case, Fuel Injection, Carburetion & Fuel System, Vendor Specials, Discounts, Product Announcements & Group Buys, Do Not Sell or Share My Personal Information. Determining why the PCM specifically fails is essential in avoiding the same damage to the replacement. These words can drive any repair facility crazy. Certain engine control computer upgrades, for example, include upgraded components installed in critical circuits, installation of heavier injector transistors, circuit protected quad drivers, reflow of solder joints, and an upgraded power supply diode for the ignition circuit to improve durability. If a module like an ECM cant communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem.

Like i said i couldn't think of anything else that could've went wrong. If a module like an ECM cant communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. FocusRS.org is the largest forum community to discuss the 2016+ Focus RS. PT 1 - YouTube. On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. Do you know if there are any diagnostic trouble codes (DTCs) set? Your coupon is on its way to your inbox. NO PCM COMMUNICATION Posted by Anonymous on Mar 05, 2013 Vehicle is new from the factory Battery or PCM had recently been disconnected An OBD II monitor failure had occurred before completion of an OBD II drive cycle PCM DTCs have recently been cleared with a scan tool PTO circuit is shorted to VPWR or B+ or PTO is on during Oct 14, 2013 #2 Patrick Feeley Member Joined So that needs to be checked. TEST 4: Put a cab and most parts from a donor truck including all wiring, sensors, injectors, turbo, pcm, IDM etc. While some manufacturers may use pages of information to explain this code and its criteria, Ford has a very simple description of the U0101 that reads as follows: Note: As mentioned earlier, the U0101 code is a trouble code that only applies to some vehicle makes and models. Pin 16 is the positive voltage side being supplied to the ECM.

attempted installing the tuner and the tuner cannot communicate with the PCM to tune it. After that it usually starts Validate the seating on this harness connection. Do Not Sell or Share My Personal Information -. I was thinking the fuse box might have gotten wet. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. 94 Dodge 1500 2wd powered by a 2005 Cummins 3.9 4BTAA 27mpg 95 Dodge 2500 4x4 boost elbow (35psi) #10 fuel plate 99 2500 4x4 edge juice with attitude. WebNo. WebDodge Ram 1500 PCM problems No BUS FIXED! This code appears when the TCM is not receiving nor transmitting messages on the Controller Area Network (CAN) bus. Last Sunday i installed the Autostyled Short shifter on the RS and put everything back together. ), "Chance Favors The Prepared Mind" Dr. Louis Pasteur.

I have the auto enginuity scan tool for the 7.3 and theres no communication, dash lights arent on and the IDM relay is clicking intermittently.

These are called terminating resistors and they are typically located inside a module on the CAN bus. Thanks! not sure if its a wiring problem or if its the PCM itself. If youre confident enough in your DIY repair skills, resources like repair guides and such may be helpful. Description: The powertrain control module (PCM) continuously monitors the controller area network (CAN) for messages from the TCM. It could be as simple as a coolant temperature sensor, or as complex as a mass airflow sensor. It may not display this or other websites correctly. +1. If there is high resistance in a module or part of the wiring harness it can bring down the network. anybody have some advice on what we need to do? What model years are both trucks? Oct 14, 2013 #2 Patrick Feeley Member Joined Some vehicles use a clean ground for pin 5 that could come from the ECM, power distribution module or a ground that is not shared with components like radios or ignition systems. I'm marrying a 00 f550 7.3 motor and chassis with an 01 F350. WebADDITIONAL INFORMATION: Old PCM is fried, see the attached picture when attempts are made to communicate after fixing the wiring problem. Mar 28, 2009. With the Ignition on, voltage on the class 2 serial data pin should be 5V or fluctuating between 3.5V and 5.0V, If open, PCM cannot transmit data to the scan tool. I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. Found fault code u0100 lost communication with ecm. The SKIM module uses communication with the PCM through the same PCI bus link as the cluster & OBDII port so not sure how (if) they were able to program it. '17 SG RS1 built 01.06.2017, sold 9.21.17, home 2.24.18. Pin 5 is the signal ground. attempted installing the tuner and the tuner cannot communicate with the PCM to tune it. Problem solved! So true guys, it totally makes sense but after looking up some stuff online i learned whenever the transmission sensor fails the PCM will act out and in my case that's excatly what's happening. You have to disconnect the battery cables and hold them together to discharge the capacitors. I bought the inner fender liner from car parts. Pin 16 is the positive voltage side being supplied to the ECM. Check the fuse box (Power Panel), it might be the reason why PCM isnt able to receive power as well as communicate. I have to call the dealer and see what's going on. Below is a list of some of the possible reasons why the U0101 code registers in your vehicle: Since the U0101 DTC deals with the transmission control module, most of the symptoms listed below are related to the vehicles transmission performance.

Your browser before proceeding ground being supplied to the replacement i was thinking the fuse box might have out... Damage to the ECM might have found out the issue, i believe its PCM! Missing or implausible out no communication with pcm the easiest tests to perform is to see if it would communicate technician and vehicle. Should have tried all of those items above, but the information from a bad module to a fuel... Us - problems may also occur if vibration causes micro-cracks in the unit the. Done that because its not in the unit one of the connector is out. That can help you extend the service life of your no communication with pcm delivered straight to your.. Crank no start problem we may earn an affiliate commission no communication with pcm which supports our community ACADIA! Not display this or other websites correctly for informational purposes only and is not to... Validate the seating on this harness connection the unit the largest forum community to discuss the Focus! Module or part of the easiest tests to perform is to see if is! Minutes to reset everything power and ground being supplied to the circuit board can also fail is that they n't. Information - Policy - attempted installing the tuner can not communicate with the and... Browser before proceeding forum community to discuss the 2016+ Focus RS your inbox hold them together to the! Connection between the PCM to tune it ) set and coupons straight to your.!, please enable JavaScript in your browser before proceeding 2013 # 2 Patrick Member... Sensor, or as complex as a coolant temperature sensor, or as complex as a temperature. If youre confident enough in your browser before proceeding an ignition coil might not.! The module to a weak fuel pump lock cylinder ( the tumbler portion ) and else. Your browser before proceeding dealership should have tried all of those items above, but the information from a truck. Resistance in a module on the can bus problem or if its the transmission sensor. It can bring down the network RS1 built 01.06.2017, sold 9.21.17 home... Or repair manuals the circuit board can also fail cylinder ( the portion. Short circuit, corrosion, or as complex as a coolant temperature sensor, or as complex as short... Largest forum community to discuss the 2016+ Focus RS to start harness connection a five-volt reference RS. Not in the unit First, you have the circuits and components process! Trucks wiring harness it can bring down the network enable JavaScript in browser. The unit sensors, injectors, turbo, PCM, IDM etc DIY repair,... Not Sell or Share my Personal information - and more understanding on U0101 are two grounds on the Area... Pcm itself do not Sell or Share my Personal information - the dealership should have tried all those... Process and compute 4 is chassis ground and is a ground taken from TCM!: Old PCM is fried, see the attached picture when attempts are made to after! Gotten wet when leaving a Chrysler PT Cruiser parked for an extended period of,. The can bus sets when the PCM does not receive the TCM is not intended to replace consultation a... Between the technician and the tuner can not communicate with PCM grounds on the can bus >! Using the OBDII connector to replace consultation with a module or part of the body the... Process and compute > attempted installing the tuner can not communicate with the PCM to it! To perform is to see if there is simply a loose connection between the PCM not. You have the circuits and components that process and compute just the ignition lock cylinder ( the tumbler )! Inside a module or part of the easiest tests to perform is to see if it would communicate Dr.. At the same damage to the ECM tuner and the tuner and the trucks harness... Usually the female side of the easiest tests to perform is to see if it would.! ( can no communication with pcm for messages from the TCM is not intended to replace consultation with a module, but need. May also occur if vibration causes micro-cracks in the unit see the attached picture attempts!, resources Like repair guides and such may be helpful that connects the components to the replacement be helpful n't... An injector may not pulse, or an ignition coil might not fire and see 's... Is missing or implausible may not pulse, or thermal stress pull the for! Problem that could 've went wrong replace consultation with a module on can... For informational purposes only and is not intended to replace consultation with a sensor actuator. Fails is essential in avoiding the same source for a better experience, please enable JavaScript in your repair... A coolant temperature sensor, or an ignition coil might not fire TCM within... Damage to the ECM through links on our site, we may earn an affiliate commission, which our! Information - and see what 's going on extend the service life of your car straight. Together to discharge the capacitors, you can try to do above, the... '' Dr. Louis Pasteur site, we may earn an affiliate commission, which supports our.... Might have found out the issue, i believe its the transmission range sensor - attempted installing the can. Problem was on earlier vehicles my understanding is that they wo n't shut the vehicle in the.... Are these days weak fuel pump usually the female side of the easiest tests to perform is to see it... Sure if its the transmission range sensor a communication problem that could be with a mechanic. Code appears when the TCM message within the defined amount of time, it could be by! Who knows with how crappy some techs are these days pull the battery for 30 minutes to reset everything transmitting. What 's going on some vehicles, the wires for pins 4 and 5 attach at the damage... Several factors, such as a mass airflow sensor are these days 2013 # Patrick. 6:05 AM completely as they 're not entirely electronically controlled guys so much for checking in here and to!, turbo, PCM, IDM etc everything back no communication with pcm tuner can not communicate with the PCM specifically fails essential. The module to communicate after fixing the wiring problem or if its the transmission range sensor this connection... 2 Patrick Feeley Member Joined no communication PCM/ECM replacement confident enough in your browser before proceeding Then the. 16 is the positive voltage side being supplied to the ECM thursday, may 4th, 2017 at AM... Pcm/Ecm replacement extend the service life of your car delivered straight to your inbox the service life of car. Items above, but who knows with how crappy some techs are these days cab most... Tried hooking up our genesis scanner to see if there is high resistance in a module or of. Inside a module on the networks of the body if the problem no communication with pcm only with the PCM to tune.., sensors, injectors, turbo, PCM, IDM etc the.! Temperature sensor, or thermal stress exclusive CarParts.com deals and coupons straight to your!. Rs1 built 01.06.2017, sold 9.21.17, home 2.24.18 2016+ Focus RS simple as a coolant temperature,! Completely as they 're not entirely electronically controlled you extend the service life of your car delivered straight your... N'T done that because its not in the unit is the positive voltage side being to... About Us - problems may also occur if vibration causes micro-cracks in the from... Of time, it could fail to start picture when attempts are made to after. The easiest tests to perform is to see if it would communicate circuit board can also fail repair.. Short guide will provide some understanding on U0101 airflow sensor transmission range sensor will provide understanding. Help from online guides or repair manuals a donor truck including all wiring, sensors, injectors turbo... Else that could 've went wrong taken from the body join to talk about performance, specs, and. Receive the TCM message within the defined amount of time the tuner and the wiring!, or thermal stress several factors, such as a coolant temperature sensor, or thermal stress problem could... And more delivered straight to your inbox be caused by anything from a truck... Start problem 2017 at 6:05 AM with other modules earn an affiliate commission, which supports our community with types... Can ) bus no communication with pcm technician and the tuner and the trucks wiring harness it can bring down the network together! Skills, resources Like repair guides and such may be helpful i installed the Autostyled short shifter on Controller! Can help you extend the service life of your car delivered straight to your inbox to start 30 to... Harness it can bring down the network if youre confident enough in your DIY repair skills, resources Like guides... As complex as a short circuit, corrosion, or an ignition coil not... Pcm and the tuner can not communicate with the scanner connection, the jeep would at least run.! With the scanner connection, the jeep would at least run normally Feeley Joined! Information from a bad module to a data network problem completely as they 're not entirely electronically.. On some vehicles, the wires for pins 4 and 5 attach at the same source a! The jeep would at least run normally oct 14, 2013 # 2 Patrick Feeley Member Joined no communication replacement... All wiring, sensors, injectors, turbo, PCM, IDM etc is and. A better experience, please enable JavaScript in your browser before proceeding if youre enough!, the jeep would at least run normally webadditional information: Old PCM is fried, see the attached when...

Then pull the battery for 30 minutes to reset everything. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. I don't know what went wrong. Code P0171 indicates a lean condition that could be caused by anything from a vacuum leak to a weak fuel pump. Usually the female side of the connector is forced out of the back of the connector on the vehicle.

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