VOLVO
TCM-029B - Transmission control module (TCM). Internal fault
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (10)
- Volvo C30 (2007–2013)2008Engine D4204T only · Transmission MPS6 only
- Volvo C30 (2007–2013)2009–2010Engine B4204S3, D4204T only · Transmission MPS6 only
- Volvo C30 (2007–2013)2011–2013Engine B4204S3 only · Transmission MPS6 only
- Volvo C70 (2006–2013)2009–2010Engine D4204T only · Transmission MPS6 only
- Volvo S40 (2004–2013)2008Engine D4204T only · Transmission MPS6 only
- Volvo S40 (2004–2013)2009–2010Engine B4204S3, D4204T only · Transmission MPS6 only
- Volvo S40 (2004–2013)2011–2012Engine B4204S3 only · Transmission MPS6 only
- Volvo V50 (2004–2013)2008Engine D4204T only · Transmission MPS6 only
- Volvo V50 (2004–2013)2009–2010Engine B4204S3, D4204T only · Transmission MPS6 only
- Volvo V50 (2004–2013)2011–2012Engine B4204S3 only · Transmission MPS6 only
What does this fault code mean?
The calibration data in the transmission control module does not match after the information has been saved, because the checksum does not agree with the calculated one. The fault may lie in the software or in a damaged control module, and the car may then not move forward or in reverse when a gear is engaged.
Possible causes
- Damaged transmission control module (TCM)
What you can do
- 1Have a workshop reload the control module software, as the fault may lie in the software
- 2Have a workshop check the fault code status after reloading and clear the code if it has gone
- 3If the fault remains after reloading, have a workshop replace the mechatronic unit and program it
Symptoms you may notice1
- No movement forward or in reverse when a gear is engaged
General guidance for car owners. Diagnosis on the car can point to a different cause.