What does fault code TCM-C007486 mean?

Diagnostic fault code details for TCM-C007486 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Repair service at OBD Tuning.

VOLVO

TCM-C007486 - Requested Driving Torque. Bus Signal / Message Failures. Signal invalid

System

Transmission Control Module (TCM)

Volvo models this fault code applies to

Applies to the following models:

9 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The transmission control module receives the requested torque limitation signal from the engine control module (ECM) over the CAN network. The signal is missing or invalid. The transmission uses it to decide shift points and to adjust system pressure. The fault lies in the engine control module, and tracing is carried out from there.

Possible causes

Fault in the engine control module (ECM)
A CAN wire that is intermittently broken or shorted, between the transmission module and the engine module

What you can do

1Read the fault codes in the CEM and the engine control module, and fix them first. Do not clear TCM-C007486 until they are fixed
2Have a workshop trace the CAN network and the engine control module with diagnostic equipment
3Clear TCM-C007486 once the root fault is fixed and drive the car to see whether it returns

Symptoms you may notice5

Malfunction Indicator Light (check engine) lit or behaving abnormally
Engine stalls at idle when a gear is engaged
Engine stalls on braking
Lock-up does not work
Shifts hard or jerky

What the fault can affect2

The transmission control module uses the requested torque signal that the engine control module sends out on HS-CAN 2
If the torque signal on HS-CAN 2 is also faulty, the transmission control module uses a basic value and the transmission runs an auxiliary program

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