Question about 1997 Audi A6

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What will my audi do if i have a bad tcm? - 1997 Audi A6

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Sliding or problems with the gears is the first symthom, but before to change or replace some parts, I suggest scanned the TCM to know if some fault code is stored there; sometimes, solving the codes (as minor repair) save buy new TCM.

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Posted on Feb 08, 2012


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SOURCE: 18034 code,i think is a bad conection, in the

Trouble code identification:
VAG type 5-digit fault code 18034 = EOBD type P1626 fault code:
Fault location = CAN data bus, TCM - no signal
Probable cause = TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM.

Posted on Jan 28, 2010

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Remove the RH seat, rear seat bottom, and plastic trim holding the right side carpet down, unbolt the seatbelt from the floor, and the carpet will pull up easily. Transmission computer is in a plastic box under the carpet there.

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I have a 1998 audi a4. it will not start and gives me the p1749 and p1625 codes. how do i fix this?

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so after you check the wiring and connections form the transmission you have 2 options
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and/or replace the TCM module on the transmission

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Ok i have a 2005 audi a4 1.8 my PRND kights stays on now when i drive it shifts hard and high rpm to 3rd,4th gears i just recently put a new transmission in 5 months ago

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Dec 15, 2014 | Audi Cars & Trucks

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Audi 2002 a4 v6 2.4l when the car first starts the RPMs surge up and down this stops if you give it some accelerator pedal. when driving around 50kph the rpms surge slightly it feels like a gentle tug...

It seems like you need to have your car's TCM scanned .The flashing lights always mean a TCM going bad.You can get a rebuilt one for around $300-$400 in Boca Raton Fl.If you live in South Florida Call German Car Depot 954-921-1515 we can scan and install a new one if needed. Ollieracepnc

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Audi forum

Code points more towards tranny problem, not TCM. Check tranny fluid level (google instructions; there is no 'dip stick'. You need to fill until if overflows). Also: gear selector (on the side of the tranny).

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Hi, I have a 6HP19A transmission in my Audi A4 3.2 (B7). The selects gears smoothly on a flat road. The moment I am travelling uphill or downhill the car sits in 3rd gear. If I release the eccelarator

Your automatic gearbox is going in "limp home mode". You need to check first the oil level. Change oil if necessary.

If the problem still occurs you shoud access the Transmission Control Module (TCM) using diagnostic equipment connected to the Data Link Connector (DLC) of the car. Then you will be full informed about the root cause of the problem, and you can replace bad pieces & reset the TCM electronic unit.


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Where is the TCM located

TCM (transmission control module).The TCM its located under the passenger side carpet. -------- Thanks.Helpmech.

Nov 16, 2010 | 2004 Audi A4

1 Answer

18034 code,i think is a bad conection, in the TCM,but where is car is a audi a4 2005

Trouble code identification:
VAG type 5-digit fault code 18034 = EOBD type P1626 fault code:
Fault location = CAN data bus, TCM - no signal
Probable cause = TCM trouble code(s) stored, TCM incorrectly coded, wiring, matching resistor in ECM.

Jan 28, 2010 | 2005 Audi A4

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