VOLVO
TCM-0402 - Shift fork 1. Plausible position
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 transmission control module (TCM) has found that the position of shift fork 1 is unreasonable. Shift fork 1 is one of four forks that engage the gears mechanically using solenoids, and each fork has its own position sensor that reports its position to the control module.
Possible causes
- Damaged position sensor for shift fork 1
- The position sensor reports an incorrect position
- Incorrect voltage supply to the sensor
- Damaged transmission control module (TCM)
What you can do
- 1Read out the fault codes from the transmission control module and deal first with any codes that may share the same cause, since a fault in the transmission often sets several codes
- 2If you have diagnostic equipment, look at the position value for shift fork 1 in live data and see whether it stands out clearly from the other forks
- 3If readings are within limits, the fault has probably been sporadic; clear the code and road test to see whether it returns
- 4If a value is outside or at the limit, a workshop should replace the mechatronic unit
- 5If the fault is inside the control module, it must be replaced; a new module is delivered without software and must be programmed by a workshop
Symptoms you may notice5
- Check engine light comes on or behaves abnormally
- Yellow warning symbol and message in the display
- Gears shift hard or jerky, sometimes or all the time
- No movement forward or in reverse with a gear selected
- Gears shift too early, too late or too often, sometimes or all the time
General guidance for car owners. Diagnosis on the car can point to a different cause.