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Transfer case troubleshooting

Check light on code U0101

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Growling sound coming from the front drive shaft housing of a 2007 h3. there is slack in the yoke where front drive shaft bolts to the transfer case. afdter removing the front drive shaft the truck will not pull (in any mode) from the rear. has anyone got an answer to the problem barring gas and a match?

Posted on Aug 22, 2014

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Posted on Jan 02, 2017

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The 2004 Trailblazer will not go into forward gears but will reverse while in 2 WD. It will go into forward gears while in 4 WD. What's wrong?


First I would check the PowerTrain Control Module for any thrown diagnostic troubleshoot codes by using a code reader.
I am unsure if there is a separate transmission computer module for your vehicle. If there is, a code reader will be necessary.
I will assume that the "check engine light" or MIL did not illuminate or the 4wd or 2wd light flash since you did not mention it.
If the car can move forward and backward in 4wd, then it's not the transmission itself since power is transferred through the output shaft of the transmission to the transfer case.
I would think that 4-wheel drive mode is not fully disengaging-
Check the vacuum hoses for damage, crimps, or leaks
Check and test the vacuum actuator
check and test the transfer case switch
check the vacuum actuator cable for damage or defect
check and test the encoder motor actuator on the transfer case
Buy a repair book or shop manual specific to the year, make, and model of the car you are having problems with that offers descriptive troubleshoot and repair procedures with illustrations. You can purchase them as soft or hardcover books or electronic downloads. Here are a few publishers, Chilton, Haynes, Motors, etc. Do an online search or go to your local auto parts store.
Otherwise, if you are not savvy in automotive diagnostic & repair, I would highly recommend flat-bedding the vehicle to a reputable transmission repair shop that has ASE certified transmission technicians. The reason you need to place your vehicle on a flat-bed car carrier - is to avoid serious damage to the transmission.

Feb 20, 2017 | 2004 Chevrolet TrailBlazer

1 Answer

U0101 fault code kia cerato 2010 . For which sensor ?


No sensor , communication problem ! All the computers ,modules are all connected on a serial data communication network . U - codes pertain to a no communication problem .
U0101 Kia Lost Communication With Transmission Control Module this is a problem best left to the dealer !

Dec 16, 2015 | Kia Cars & Trucks

2 Answers

Transfer Case stuck in 4 wheel drive


To Troubleshoot Transfercase stuck in 4wd issue.Click the link below and follow the details:
http://www.allcarhelp.com/2015/04/transfer-case-stuck-in-4-wheel-drive.html

This will help.
Thanks.

Apr 14, 2015 | 2000 Chevrolet Silverado 1500

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

1 Answer

Nissan Altima 2010 this code u0101


Hi Patricia:
DTC U0101 - TCM Message Unavailable
I suggest to check description and solution details HERE.

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Sep 14, 2012 | Cars & Trucks

1 Answer

2004 Maxda RX8 codes U0101 & U0155


These are transmission control module can communications codes. ealer will need to repair these for sure.

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2 Answers

U0073 u0101


0073 ambient air temperature sensor circuit high input 0101 mass or volume air flow circuit range performance problem it sounds like the mass air flow sensor is dirty check with your G.M. dealer to see if its still in warranty

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Trouble codes C0305 C0327 U0100 U0101 U0140


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

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1 Answer

Code U0101


IPC - instrument cluster - BCM - body control module (computer )

U0101 - your vehicle has a serial data communication network that all the modules communicate on , this U0101 means one isn't talking . You best bet take to a qualified repair shop .

Apr 30, 2017 | 2006 Chrysler Town & Country

4 Answers

Error code U0101: Lost Comm with TCM


i do have the same problem and i took the car to 5 differant mechanic an dget no solution the aaamco the petboys the mazda dealer another transmission specialist please let me know if u have any solution

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