VOLVO
TCM-0418 - Position sensor shift fork 4. Signal to high
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) receives too high a signal from the position sensor for shift fork 4. The sensor shows where the fork is, so a wrong value gives the control module incorrect information. The cause can be in the cable, the sensor or the control module.
Possible causes
- Cable short-circuited to supply voltage
- Damaged position 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
- 2Have a workshop with diagnostic equipment check the voltage supply to the position sensors; if it is outside the normal range, the fault is inside the control module
- 3Use a multimeter to check that the cable to the position sensor for shift fork 4 has no contact with the battery's positive supply
- 4If you have diagnostic equipment, look at the position value for shift fork 4 in live data and compare it with the others
- 5If a value is outside or at the limit, a workshop should replace the mechatronic unit; if readings are within limits, the fault has probably been sporadic
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
- Gear changes take too long to complete, sometimes or all the time
- No automatic gear changes
General guidance for car owners. Diagnosis on the car can point to a different cause.