What does fault code TCM-C007400 mean?

Diagnostic fault code details for TCM-C007400 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Repair service at OBD Tuning.

VOLVO

TCM-C007400 - Requested Driving Torque. General Failure Information. No sub type information

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 signal from the engine control module (ECM) over the CAN network. The signal is missing or faulty. The transmission uses it to decide shift points and to adjust system pressure. The fault lies in the engine control module, so fault tracing starts there.

Possible causes

The fault lies in the engine control module (ECM)
A CAN wire that is intermittently broken or shorted, linking the engine module to the transmission 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-C007400 while they are still present
2Have a workshop trace the engine control module and the CAN network with diagnostic equipment
3Clear TCM-C007400 once the root fault is fixed and drive the car to see whether the code 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 when slowing down
Lock-up does not work
Shifts hard or jerky

What the fault can affect2

The transmission control module uses the requested torque signal sent from the engine control module on HS-CAN 1
If that signal 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.