So if PCM does not recevie TCM signal from CAN DTC's: U0101, U0131, U0146, U160F, U1611, U1610, U1614, U1615, U0132, U1607, And U1608 Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to Cadillac Escalade Models 2022 All All All All Chevrolet Silverado 1500-New (RPO J22, VIN Digit 12 = 5 or greater) 2022 All All All All Chevrolet Suburban 2022 All All All All Jun 29, 2020 · Labor: 1. To fix the u0101 fault code, check for a faulty Transmission Control Module (TCM), open or shorted TCM harness, poor electrical connection in TCM circuit, or a faulty Engine Control Module (ECM). Because DTC U0101 is refers to loss of communication with the TCM, determine if your scan tool can communicate with the TCM. Mar 21, 2018 · I have a '13. U0129 Chevrolet Code - Lost Communication with Brake System Control Module. And the trans won't pulled. Oct 4, 2010 · If you have a 700 code-- there are other trans codes-- start by having the trans codes read. Answered in 36 minutes by: Chevy Mechanic: Triston. It can also be caused by a faulty Airbag ECU. Pin 4 & 5 have good grounds. changed VSS all was fine for awhile and then out of nowhere all codes come back. There Feb 10, 2021 · I went through the steps for the reset on the TCM on my 09 Silverado 2500 HD 6. U0100 is Lost Communication With Engine Control Module:- Faulty Engine Control Module (ECM)- ECM harness is open or shorted. It runs fine for a while and randomly the abs light and engine light come on and it cuts power and wont shift. 2009 chevy silverado 2500keeps setting code u0100 and u0101 2009 CHEVY SILVERADO 2500*****KEEPS SETTING CODE U0100 AND U0101 WITH A SERVICE TRACTION CONTROL MESSAGE APPEARING ON THE DASHBOARD. Attempted to reinstall old TCM and the truck Feb 26, 2023 · February 26, 2023 by William Baldwin. Have power on pins 10 & 70. Jul 15, 2022 · The serial data message sent by the module also contains a request for the ECM to illuminate the Malfunction Indicator Lamp (MIL). Fumoto valve. Edge Insight CTS. 0 hour. 6 AWD - '23 Silverado LTZ 6. 06 duramax code u0101 says service brake system. truck is bucking and jerking. Ask Your Own Chevy Question. Many readers will only read the 700 and not the others. also has a mass airflow sensor code as well. Attempted to start with new TCM in order to get to the dealer for programming and the truck will not start. May 13, 2022 · The U0101 code means that the ECU has lost communication with TCM ( Transmission Control Module ). Nov 2, 2014 · 2003 Silverado Z71--SOLD 1998 Chevy Blazer--SOLD 1996 Chevy Caprice 5. With your scan tool, check if the TCM is If the SPS Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS system as follows: Open TLC/TIS on the computer used to program the vehicle. ok. Jun 2, 2021 · U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. The tranny shifts fine thru all the gears when in the automatic mode but will not shift manually. Some scan tools also give a Transmission Control System (MIL Reques Aug 22, 2011 · #PIP3605A: CTC U0101 No engine crank and no communication with TCM Feb. . decision, that includes the Warranty Code, to the repair order. Took it to Chevrolet. My 2017 had "Service 4wd" with the traction control squiggly lines lit up today. It is generic, so it has the same meaning for your Chevy Silverado as it would any other. Chevy Silverado EV Forum 2K+ members Mar 11, 2023 · 40 posts · Joined 2017. Been lurking for a while and finally bought my first duramax a few months ago. 5 LLY, 2X, shell, XDR, MikeL Heavy duty up Jun 7, 2018 · Still getting the same trouble codes U0140 loss communication with BCM and U0100 and U0101. Nov 29, 2022 · Open the hood after turning off the engine and removing the ignition key from its switch. I checked my wiring harness, no problems with it. I see this is a common issue but inconclusive on the fix. 5-10 LMM Forums Jul 12, 2021 · U0101 is a generic powertrain code, which means it has the same definition for the Chevy Corvette as it would any other vehicle. 3L LV3, 2. 3L L84, 6. The common causes of the U0109 code include a bad fuel pump control module, wiring issues, and data network issues. the truck idles fine, but acts as if the fuel delivery is Mar 28, 2014 · Now I lifted my truck and put it on 305/55r20s, no issues. 29,2008 Models affected: 2006-2007 Chevrolet Silverado Classic 2007-2008 Chevrolet Silverado 2006-2007 GMC Sierra Classic 2007-2008 GMC Sierra Equipped with Allison LCT-1000(RPO-MW7)Automatic Transmissions Mar 19, 2013 · I have a 2004 Silverado 2500HD 6. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. Another scanner also shows the U0073 "control module, communication Bus 'A' off". Getting codes p2544, c0055, u0101, p0700. The most frequent way to connect devices is via the Controller Area Network (CAN) bus. check alternator 14. The Silverado uses a clutch in the torque converter to lock the engine and transmission together at highway speed. If on-board diagnostics (OBD) logs this code, the The U0101 code is typically the same as a U0100 code, but some makes and models will send the U0101 code if there’s a specific problem with the TCM, while the U0100 code may be more general and Jan 8, 2022 · DO NOT USE BIG TEST LEADS TO READ ON THIS CONNECTOR!! YOU WILL DAMAGE FEMALE PINS!!Cheap multimeter for troubleshootinghttps://amzn. Set programmer back to stock same code still no cel or problems turned back up to performance no cel and again no problems. My codes were U0101 and P0802. DTC U010 is Jun 29, 2020 · 2007-2010 Chevrolet Silverado 2007-2010 Chevrolet Suburban 2007-2010 Chevrolet Tahoe 2008-2010 Chevrolet Silverado Hybrid 2008-2010 Chevrolet Tahoe Hybrid Chevrolet Factory Service Bulletin OBDII Code U0101 There is a factory service bulletin for some models with U0101 code, the factory recommends that prior to any parts replaced there are Step-1: Examine all fuses and grounds. This started happening after I had a battery go bad. Locate the MAF sensor 1 on the passenger side of the vehicle; it will be on the pipe leading from the air Chevrolet Silverado 1500 (New Model) 2019 2019 Equipped with 5. to/35qV0QYWhen you click Jun 21, 2021 · June 21, 2021 by Jason. Today when I started the truck, all the service traction control and other things were gone, the check engine light was still on, throwing a U0101 code and now also a P0880 code. Also my manual shift capability did not work. 0L LM2 GMC Sierra 1500 (New Model) 2019 2019 Equipped with 5. BOTH CODES ARE IN THE EBCM. Typically goes away if I shut the truck off, but comes back within a few Jun 29, 2020 · Labor: 1. U0401 Chevrolet Code - Invalid Data Received From Engine Control Module. Your vehicle’s powertrain control module (PCM) will log this code when the fuel pump control module develops a problem. I know there is a TSB on it to check connections on the passenger side of the trans as well as the actual FSCM module above the spare tire. 8l. The automobile fault code U0151 can be caused by a faulty Controller Area Network (CAN) Communication System. My check engine light came on yesterday and I downloaded teh following codes: P0045, P0101, P0401, P0404, P0405, P0670, P0700, P1093, P1094, P1404, P1621, P2227, U0073, U0101,U0105, U0106. May 17, 2018 · Chevrolet TSB PIT5405. I sent my TCM to Autocomputer Specialist. In the case of the P0700, it is a general code. I currently display code U0101 which returns almost immediately after clearing it. Throws a P0700, P2544, U0073, U0101. - ECM circuit poor electrical connection. 213k miles. I think the guy said P802 as well, but I couldn't find that. To diagnose the U0121 Chevrolet code, it typically requires 1. 0 hour of labor. Parts Information Causal Part Description Year Vehicle Part Number Qty X CABLE, AUX BAT POS 2015 - 2020 Escalade, Suburban/Tahoe, Yukon 84494554 1 X 2015 - 2016 Silverado HD, Sierra HD, X 2014 - 2018 Silverado LD, Sierra LD, (Excluding L8B) X 2019 Silverado LD, Sierra Limited X 2009 chevy silverado 2500keeps setting code u0100 and u0101 2009 CHEVY SILVERADO 2500*****KEEPS SETTING CODE U0100 AND U0101 WITH A SERVICE TRACTION CONTROL MESSAGE APPEARING ON THE DASHBOARD. If they work, examine all ground connections for the TCM module. 0L LM2 Tahoe 2021 2021 3. Jun 1, 2022 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Jul 3, 2014 · What would cause one DT code u0101 and make my transmission stay in 2nd gear? 2012 Chevrolet Silverado 3500 HD. To diagnose the U0109 Chevrolet code, it typically requires 1. Forums. Jun 29, 2020 · Labor: 1. Reinstalled my TCM and the codes came back. Jan 5, 2024 · Silverado allison 2004 pcm 2500hd chevrolet chevy vin could number find modelWhat would cause one dt code u0101 and make my transmission stay in 2nd U0101 code chevy silverado2500hd silverado chevrolet allison 2004 chevy. Aug 29, 2016 · A quality scan tool and a digital volt-ohmeter (DVOM) are necessary to trace U0101 issues. Limp truck back home, gauges start acting up, door locks freak out. Shut truck off and about 20 minutes later it started and no light. Throttle Down Kustoms Bumper. I changed out the battery with a new one and 2007-2013 Chevrolet Avalanche, Silverado 1500 2007-2014 Chevrolet Corvette, Silverado 2500/3500, Suburban, Tahoe •U0101: Lost Communication With Transmission Sep 25, 2013 · 68 posts · Joined 2010. 3L L82, 5. 3 Vin: 2008 Chevy Silverado 1500 5. 0 Vortec Max 4wd truck will typically start with a warning light to service stabilitrak and traction control, then the transmission will immediately start to shift extremely hard from 1st to 2nd and even some from 2nd to 3rd. I have to stop and turn it off and it resets itself and then im good to go again. AEM dry filter with custom air intake made by yours truly. 3 Vin: 2GCEC13J381160171 Vehicle drove from Chicago to Texas with no issues, then the service stabilitrack message appeared and the check engine light came on, along with t … Jul 2, 2019 · u0121 u0100 u0101 help! 2008 Chevy 3500 6. This code appears when something has interrupted the communication between two of your Silverado's control modules. The estimated repair time for this fault code is 1. TCI Deep Pan. If it's time to replace your PCM we're here to help. This preliminary information communication provides information to the technician for a reduced power message, steering assist, engine stall or the instrument panel, radio, and or heater-vent-air conditioning go blank with multiple diagnostic trouble codes. The automobile fault code U0102 indicates a communication problem between the transmission control module and the engine control module. Kennedy lift pump. Traced all wiring from tcm through main harness. P0741 can register whenever this connection is Apr 1, 2020 · The supervision time-out period is 250 ms. It means that your Express’s TCM (Transmission Control Module) can’t communicate with the rest of the vehicle, usually due to a bad wiring harness or an issue with the TCM itself. Q&a: u0101 code duramax, chevy silverado, 2004 silverado tcm & ecm locationCrist i have a problem with this code in a 2018 Jul 12, 2021 · U0101 is a generic powertrain code, which means it has the same definition for the Chevy Express as it would any other vehicle. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Brake System Control Module has not been received. Ive had the tuning for maybe about a month. The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent Apr 9, 2012 · Service Information 2009 Chevrolet Silverado - 4WD | Sierra, Silverado VIN C/K Service Manual | Document ID: 2743912 #PI0310B: Loss of Communication with Allison TCM, Intermittent Transmission Hesitation, Reduced Torque, Range Inhibit, Clunk, Stuck in Gear or Neutral, Wont Shift, DTC P0880 and/or U0101 Set - (Dec 2, 2011) Feb 23, 2024 · The first step in diagnosing a U0101 code is to check the check engine light and any diagnostic trouble codes (DTCs) that are present. It’s know to affect the Chevy Silverado quite often. 5 volts at PIN 6 and 14 of the OBDII connector under the dash. Over the last 3 months or so I have been getting intermittent ABS and stabilitrak lights as well as the brake light. Look for broken, bent, pushed out, or corroded connector’s pins. U0101 is often misdiagnosed as a Jul 10, 2023 · TCM cause all these problems? 2008 Silverado 6. I just put a 4” DP back on it with efilive and a dsp5. The battery was dead and the battery charger was hooked up backwards. 5 volts while running. Try clearing the codes, they come back. Sep 16, 2023 · As many of you know the 2011-2014 Allison 1000 A50 TCMs are backordered. Code U0101 Lost Communication With TCM is a trouble code that inform drive that there is a communication problem between vehicle powertrain control module PCM and Transimission control module TCM. Drove truck 30 minutes with no issues. Oct 15, 2023 · Chevrolet Silverado 1500: 2008 Chevy Silverado 1500 5. This is how I got my truck back on the road with the U0101 code for lost communicati Jul 8, 2018 · One of the most common problems with the Chevy Silverado is when it throws the P0700 trouble code. truck runs. 5-05 LLY Forum. Examine all of the fuses to ensure that they are functioning correctly and that they are supplying power to the TCM module. It still runs and sounds like new for the most part. A trouble code is a code thrown out by an automatic transmission whenever it detects that there is an issue going on. The tow/haul switch DID work, but the +/- buttons did not work at all. If any of the following diagnostic trouble codes u0073, u0078 Apr 8, 2020 · The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Engine Control Module ( ECM) causing its integrity to be questioned. If I shut it off it will start right up again, but it has no power as if it is in limp mode. Here’s what it means: P0741: Torque Converter Clutch Circuit → Performance or Stuck Off. tcm has lost communication with engine control module stored in it. U0101 and u0106 codes stored in the ecm. After a few months of the intermittent issue I finally got it to throw a code and it was the U0109 - "Lost Communication With Fuel Pump Control Module". Oct 2, 2022 · When the stabilitrak and traction control alarm, it will shift extremely hard from 1st to 2nd, and fairly hard from 2nd to 3rd. 3l LT 2WDIn this Video I will try my Best to Explain my Problem "No Start" "No Crank" "Long Cranks No Start" on this 5. My 2012 Sierra 5. About a month later and sitting getting gas, msg comes up, "Service 4wd", "stablizer off" and codes P0700 and U0100. EGR valve and cooler delete. Select Settings. U0100, U0101, U0102, U0109, U0121 or U0140 Set (Repair Terminals in Transmission 2008–2012 Chevrolet Silverado Hybrid, Tahoe Hybrid 2007–2012 GMC Sierra I am not affiliated in any way with Dan's Diesel Performance. Sep 1, 2018 · P0741 is a very common trouble code. For probably the last 2 weeks I have gotten U0101 and P0880 codes shortly after starting my truck and letting it warm up. The truck does not quite have 14,000 miles on it. Also check the harness where it goes over the trans, sometimes the wire gets cut or wears and shorts. I have not had many issues with the truck at all until the past year or so. How to fix a U0101 engine code: Lost Communication with TCM (Transmission Control Module)Diagnosing a U0101 can be difficult and time-consuming. 7L L3B, or 3. ”. Im just a customer who was saved by their product. 6l turbo diesel. Once running it will rev up and sounds okay. Hi guys, it's been a few years since I posted anything and I guess it's a testament to the reliability of these trucks. code reader displayed "U0101" lost of communication with TCM. Aug 26, 2021 · U0101 and u0106 codes stored in the ecm. They "tested it" and said it was OK, charged me $150+ shipping. I just pulled codes on my edge programmer and it pulled code u0100 lost comm to ecm/pcm a. 5 - '16 Equinox LTZ 3. Apr 10, 2013 · 3 posts · Joined 2013. I get the 60 ohms reading between Pin 6 and 14. 3L Check engine light on PRNDL. The P0700 just triggers the check light. Mar 28, 2022 · 2008 2500HD Sierra 4x4 6l90 WT (Very few modules, manual windows) Driving along, the trans goes in to limp mode. 2019 Chevy Silverado LT 5. 3 I hope this If you decide you need professional help, consider giving Solo PCMs a call. It’s a 2010 Sierra 2500hd. So I have a 2011 Silverado LT its an extended cab with a 6ft bed. Chevy Mechanic: Chad Farhat. #5 · Jun 29, 2023. U0101 is often misdiagnosed as a Jan 23, 2009 · HELP code U0101. This video is for educational purposes only. Jun 4, 2023 · My 2013 chevrolet silverado 1500LT was showing service Stabilitrak and traction control. This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. Jul 29, 2020 · 2008 chevy express van 4. 3,216 satisfied customers. May 26, 2022 · I took a rigours steps on diagnosing a tcm that will not communicate with scantool or ecu, shifter Won't get out of park, I have no option that to fix this i Jun 29, 2020 · Labor: 1. check batter voltage. 2L L87, 4. 6 Diesel engine and it has the code U0101. Jump to Latest Follow Chevy Silverado EV Forum A U0101 code indicates that the engine control module (TCM) and other control modules on the vehicle are not communicating with one another. 7--Totalled 1996 Chevy Camaro Z28--SOLD:banghead: U0101 code is lost comms with the TCM. The infamous U0101 Code. U0100 is a generic diagnostic trouble code, meaning it has the same definition for any vehicle made in the 1996 model year or newer (including the Chevy Silverado). #1 · Apr 21, 2013. #1 · Apr 10, 2013. U0146 Chevrolet Code - Lost Communication With Serial Data Gateway Dec 6, 2022 · How to fix a Chevy or GMC P0700 Code: Malfunction with Transmission Control Module (TCM). Diamond Eye 4" Turbo Back Exhaust BYE BYE Kitty and Ruffler. 6 Duramax and then back it out of the shop but before I could take the truck for a drive I had to lock my shop up then I found out the truck would not shut down with the key in the off position it kept running I finally pulled the ECM fuse which cut the engine off but with the key out but the check engine light Feb 4, 2022 · 2014 duramax throwing U0101 code. DTC U0101 IS AN ECM LOSS OF COMMUNICATION NOT TCM. Cleaned ground at right rear of motor. I am not getting any voltage however at Pin 1. Apr 21, 2013 · 110 posts · Joined 2012. Aug 9, 2023 · The diagnostic trouble code (DTC) U0109 stands for “Lost Communication with Fuel Pump Control Module. Was bone stock with 105k miles on it. 2 - '20 Traverse High Country AWD Mar 23, 2023 · To diagnose the U0101 code, it typically requires 1. I took the truck into the dealer. #4 · Feb 25, 2014. To diagnose the U0100 Chevrolet code, it typically requires 1. Drove it fairly easy and wasn’t beating on it for about 30 miles or so. Nov 4, 2022 · in this video I'm gonna share with you how to Test a module that doesn't communicate!#TCM #shorts #transmission #gmc Mar 24, 2018 · On a 2007 Chevy 3500 with a 6. Apr 1, 2020 · The supervision time-out period is 250 ms. Pictures shown may vary from actual. There is now a line under the gear selector and I am also able to drive it now. 0L LM2 Silverado 1500 2020 2021 Suburban 2021 2021 3. It means that your Corvette’s TCM (Transmission Control Module) can’t communicate with the rest of the vehicle, usually due to a bad wiring harness or an issue with the TCM itself. 6l lmm Chevy Silverado EV Forum 2K+ members. If this (CAN) bus is disrupted, control modules will be unable to communicate information. Chevy 04. P25A2 Chevrolet Code - Brake System Control Module Requested MIL Nov 15, 2019 · Intermittent stabilitrak and ABS. They ran it thru their test equipment. trouble code u0101. The cost of fixing this fault code is influenced by the hourly rate charged by the auto repair shop, which is typically between $75 and $150 per hour. The DTC will be set when the ECM receives a serial data message from the Brake System Control Module indicating that DTC has been set in the module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Serial Data Gateway Module has not been received. tcm has lost. To diagnose the U0102 Chevrolet code, it typically requires 1. Mine threw codes U0101 and P0880. Aug 3, 2019 · C0050, U0140, U0100, U0101, U0102. Installed a new tcm and checked continuity. Unhook battery, clear codes they come back. It is common for most auto repair shops to charge between $75 and $150 per hour. Check engine light isnt on and everything seems to work fine. 2006 6. Jump to Latest 2001 Chevy 2500 4x4 ECSB, 6 speed with Southbend Clutch, 4" MBRP straight pipe exhaust. Mar 17, 2015 · Connected scan tool and found u0101 code. Jun 25, 2015 · Hard cranking, no start condition, etc. When this happens my speedometer on my dash will sweep from 60 to 40 while I'm driving and the truck will also shift hard. I am getting U0101 codes. " Feb 25, 2014 · 205 posts · Joined 2012. TAKE OUT ECM PLUG AND CLEAN IT. trucks goes crazy with shifting, cluster mph jum … read more Jul 3, 2023 · "some suffer from insanity, I choose to enjoy it" John '15 1LT 2. Mar 7, 2020 · 2010 U0101 code. Home. That's for the info. #1 · Sep 25, 2013. 0. Ordered new one from Autozone, they popped it in May 8, 2024 · 2019 Chevy Silverado LT 5. Determined that wiring was ok. Retest and DTC sets in 5 seconds of clearing. The most common causes of U0073 are Dec 25, 2009 · My truck is a 2006 Silverado with the Allison Automatic. Recent Chevrolet Silverado 3500 HD Questions. Learn about common causes of the U0100 code, and how to diagnose them. Just no communication with TCM. Other DTCs related to the CAN bus system may also be present. Jun 23, 2021 · DTC U0101 stands for “Lost Communication with TCM. Lastly, a poor electrical connection in the Airbag ECU circuit can also trigger the U0151 fault code. Discovered a bad TCM. Make sure that all the connectors are clean and tight. 2019 Silverado 1500 LT Code P25A2,U0146,U0100,U0101 My wife was driving the truck around and the check engine light came on. 6 liter. DTC 100 IS TCM. Feb 21, 2021 · 2007 Chevy Avalanche 5. It Hi guys -- I have a 2006 Chevy 2500HD Silverado. I have 2. When I start the truck it only runs for a few seconds it take 3 or 4 time of trying to start it before it stays running. it has the Apr 19, 2015 · 2006 Chevy Express 1 Ton Ext Duramax, EFILive. Visually inspect related wiring harness and connectors for damage or corrosion. Diamond Eye turbo direct pipe. A dead battery, faulty TCM, and data bus issues are the most common causes of a logged U0101 trouble code. B&M Supercooler. sat for an hour and while backing out of my parking spot transmission shifted real hard, loss of power, "service stabilitrak" message, no line under gear selector, and CEL came on. Not a misprint, only 13, 897 miles on it. Modern vehicles that run automatic transmissions feature dedicated control modules whose job is to make sure that the transmission is working as intended. Anthony Sorrento. I have two different scanners and one shows the U0121 code "lost communication with electronic brake control module". Oct 2, 2019 · 2019 Chevrolet Silverado 1500 « Back to Silverado 1500 TSBs; Complaints 913; The U-Code combinations will include two or more of the following codes: U0101, U0102, U0129, U0140, U18A2 Apr 18, 2019 · I have a 2006 Silverado 3500 Duramax, I am showing codes U0101, P2510 and C0055. Each message contains the identification number of the transmitter module. The dash indicator wouldn't move off of (6). Another cause of this fault code is when the Airbag ECU harness is open or shorted. DTC U010 is set when the transmission control module is unable to receive or send messages to the controller area network (CAN). Select and start SPS/SPS2. Jul 22, 2020 · Hi everybody, and welcome to my "stevenofpa" YouTube Channel!This video shows you what it's like to see the broken wire that was causing a trouble code U0101 Chevrolet Silverado 1500 2017-2018 SOP Plant Code Z*: • U0101 • U0140 • U0121 • U0073 – When checking for DTC's the following codes are Jun 6, 2006 · Just no. Found all to be in range. Put the code reader and got these 4 codes. I have a 2005 chevrolet silverado 2500hd 6. I bought a used TCM (transmission control module} and installed it ,but that did not solve the problem. 0L LM2 Sierra 1500 2020 2021 Yukon Chevrolet Silverado 1500 (New Model) 2019 2019 SOP 1GTU9BED4KZ287517 (Fort Wayne Assembly) 3GTU9DED4KG159404 codes: U0101, U102, U0129, U0140, and/or U18A2. PCM get information from TCM through control area network CAN. Feb 25, 2018 · Chevy / GMC Duramax 04. A U0101 code indicates a communication issue between the transmission control module (TCM) and the engine control module (ECM). PCV Re-Route. 3 C/C 4x4 Z71 has 81K miles on it now and has been fairly trouble free. transmission still shifts and has all functions. If the scan tool won't power up, check if your data link connector (DLC) fuse is burnt. The TCM and the ECU are constantly communicating and exchanging information that is Sep 21, 2016 · let look up this code be right back. 3LCheck engine light on PRNDL light stays in N even when out in reverse or driveCodes : U0101-00 U1345-00Thanks … read more. Chevy / GMC Duramax 07. Select the Warranty Claim Code tab. I also have a bullydog tuner installed. I replaced the battery and cleared the codes but still get the U0101 twi … read more Jun 7, 2014 · Check engine light on and I scanned to find u0101 code which is a code for no communication with TCM. It puts the truck in limp mode, illuminates the CIL and Traction Control light, and the DIC reads "service stabilitrack" "service traction control" and "service park assist. Our experienced technicians are always ready to assist, simply call us at (800)-886-9926, or contact us directly on our website. 6L Duramax. Scanner showed u0101, TCM. Mar 25, 2024 · To diagnose the P0777 Chevrolet code, it typically requires 1. checked pins 6 & 69, good continuity. rqayiikguhdzzgfozpqw