VOLVO
TCM-0194 - Gear selector module (GSM). Faulty signal
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (6)
- Volvo C30 (2007–2013)2007–2013Transmission AW55-50/51SN only
- Volvo C70 (2006–2013)2006–2013Transmission AW55-50/51SN only
- Volvo S40 (2004–2013)2004, 2011–2012Transmission AW55-50/51SN only
- Volvo S40 (2004–2013)2005–2010Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo V50 (2004–2013)2004, 2011–2012Transmission AW55-50/51SN only
- Volvo V50 (2004–2013)2005–2010Transmission AW50/51 AWD, AW55-50/51SN only
What does this fault code mean?
The gear selector module (GSM) has received ten faulty messages on the network between the selector and the transmission control module. The fault is caused by interference in the communication, and manual gear changes and the gear indication may then be affected.
Possible causes
- Communication interference
What you can do
- 1Clear the fault code and road test to see whether it comes back
- 2If you have a diagnostic tool: read the winter mode selector (W) status in live data and press its switch; the status should change
- 3Have a workshop check the connector and the wiring to the gear selector
- 4If communication still fails, have a workshop decide whether the gear selector module needs replacing
Symptoms you may notice1
- The general warning lamp is lit
General guidance for car owners. Diagnosis on the car can point to a different cause.