Question about 2007 GMC Yukon

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Trouble codes C0305 C0327 U0100 U0101 U0140 - 2007 GMC Yukon

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I have 2006 trailblazer co327 i replaced transfer case motor and switch the same problem

Posted on Mar 07, 2013

  • greg Mar 07, 2013

    i have 2006 trailblazer co327 i replaced transfer case motor and switch the same problem

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Co327 is a code for your transfer case encoder motor and the U codes are communication codes. Most likely cause is the encoder motor needs replacement

Posted on Feb 11, 2012

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My 4x4 is not working on my 2007 Yukon, I replaced actuator and the lights on the selective dial work but no dash warning light.


replaced what actuator ? The 4X4 switch on the instrument cluster ? Did you ever think of having it check for DTC'S - diagnostic trouble codes ? There are a number of them , they are there for shorting diagnostic time DTC B0770
DTC B0775
DTC B0780
DTC B0785
DTC B0790
DTC B2725
DTC C0300
DTC C0305
DTC C0306
DTC C0321
DTC C0326
DTC C0327
DTC C0359
DTC C0374
DTC C0378
DTC C0379
DTC C0550
DTC C0558

Feb 23, 2017 | Cars & Trucks

1 Answer

Replaced 4wd switch on dashboard, did not solve problem. 4wd doesn't connect.


Which of these transfer case's does your truck have ?
Transfer Case - NVG 149-NP3 Transfer Case - NVG 246-NP8 Transfer Case - NVG 261-NP2 Transfer Case - NVG 263-NP1
The NVG 263 transfer case features a three button shift control switch located on the instrument panel.
DTC B0790 DTC B2725 DTC C0306 DTC C0327 DTC C0359 DTC C0379 DTC C0550

The NVG 246 EAU transfer case features a 4 button shift control switch located on the instrument panel.
DTC B0790 DTC B2725 DTC C0300 DTC C0305 DTC C0306 DTC C0321 DTC C0327 DTC C0359 DTC C0374 DTC C0379 DTC C0550
Regardless both of these switch's are input's to a control module . There are probably DTC'S - diagnostic trouble codes stored . You should have the vehicle checked for DTC , That means taking you vehicle to the repair shop .

Mar 26, 2016 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

What should i look for when getting engine codes u0121,u0101,u0155,u0073,u0100. plus all lights on clusters on. some times car only goes 5mph till i shut off and restart.


All these " U " codes are communication issues amongst modules. These modules communicate on bus wiring from one to another. You have a communication issue with one or more modules. You will most likely have to have the vehicle proffessionaly scanned with a vehicle scan tool to be able to identify the source of this communication issue. You may have a bad module/wiring/power/ground issue to be repaired

Nov 29, 2015 | Cars & Trucks

3 Answers

What do these codes U0100, U0155, U0101 and P2187 mean for my mazda?


U0100 - Lost Communication with ECM/PCM "A"
U0155 - Lost Communication with Instrument Panel Cluster (IPC) Control Module
U0101 - Lost Communication with TCM
All of them are Geniric Codes 4 Mazda, I would say who ever was working on the car last, posobly forgot or missted 1 or 2 connection
plugs along the way near the last repairs. So just trace yr last steps 2 see if ther any unpluged connectors, cos looks like they all are part of same chane in that line.
P2187 - Sys To Lean at the idle Bank 1
Hope that helpes you. Good luck.
Tony D:-)

Aug 03, 2014 | 2004 Mazda 6

1 Answer

What is code u0100 and u0101 ?


look it up your self, and see how to do more tests to find
what it fails. in the book,


https://suzukipitstopplus.com/Products/1035-2008-forenza-reno-service-manual.aspx

4 bucks.

Jun 18, 2014 | 2008 Suzuki Forenza

1 Answer

Toyota codes u0100 and u0101


U0100 means lost of communication with ECM/PCM
U0101 means lost of communication with TCM

Feb 24, 2014 | 2007 Toyota Camry

3 Answers

2004 GMC ENVOY SES light came on....


so many codes suggest a problem ECM or BCM
check for all ground points , battery connections and harness connections to the computer units

May 16, 2017 | GMC Envoy Cars & Trucks

1 Answer

Code u0100 and u0101 2008 aveo


U0100 is lost communication with the PCM (on board computer that controls everything) the U0101 is no communication with the TCM (transmission Control Module. I have read where a lot of people have had no luck trying to fix this and the delaers charge big bucks for it. typically the problem starts shortly after being jump started or having to jump start someone else and hooking the cables up properly. it can also just happen over time which is another of the many reasons i hate new cars. one fix i saw was to remove the positive battery cable and let it sit for 15-30 minutes then ground the positive cable out for 20 seconds before reconnecting it to the battery again, this may not work and if it doesn't it will require either the TCM be replaced or the dealer to have to dig into your car and charge you big time for the work. hope that helps

little side note i have seen some of these error messages cleared up by cleaning up the ground contacts for the TCM and even one fella had some luck replacing the speed control sensor in his and the lights all went away and it ran fine after that.

Feb 21, 2013 | 2008 Chevrolet Aveo

1 Answer

Code: U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE What does this mean?


U0140 Lost Communication With Body Control Module

This generic "U" trouble code applies to all car makers and indicates a problem between the PCM and the body control module. This is likely the result of a problem in the data link between the two modules.

Is the U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE also set?
YES: Follow the diagnostics for U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE
Perform the POWERTRAIN VERIFICATION TEST. See: Verification Tests\Powertrain Verification Test
NO: Replace and program the Powertrain Control Module.
Perform the POWERTRAIN VERIFICATION TEST. See: Verification Tests\Powertrain Verification Test

Good luck.

Aug 24, 2010 | Jeep Liberty Cars & Trucks

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