What does fault code TCM-0515 mean?

Diagnostic fault code details for TCM-0515 (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C30 (2007–2013)). Repair service at OBD Tuning.

VOLVO

TCM-0515 - Sensor group 1. Supply voltage too high

System

Transmission Control Module (TCM)

Volvo models this fault code applies to

Applies to the following models:

4 models

C30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)

Show models by year and engine (10)

What does this fault code mean?

The supply voltage to sensor group 1 in the transmission is too high. Sensor group 1 monitors the shift forks for the odd gears and reverse. The cause is either a voltage cable to the sensors that has been shorted to supply voltage, or a damaged transmission control module.

Possible causes

Voltage cable to the sensors shorted to supply voltage
Damaged transmission control module (TCM)

What you can do

1Read the fault codes, clear TCM-0515 and drive the car to see whether it comes back
2Inspect the cable to the sensors for chafing, pinch damage and places where it could have touched a live supply wire
3Use a multimeter to check that the supply cable has no contact with supply voltage (positive) when the ignition is off
4Have a workshop check the voltage to the sensors, and replace the transmission control module if the fault is in it

Symptoms you may notice5

Malfunction Indicator Light (check engine) lit or behaving abnormally
Yellow warning symbol and text message in the display
No forward or reverse movement with a gear selected
Shifts hard or jerky
Gear changes take too long to complete

General guidance for car owners. Diagnosis on the car can point to a different cause.