What does fault code TCM-048A mean?

Diagnostic fault code details for TCM-048A (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C30 (2007–2013)). Repair service at OBD Tuning.

VOLVO

TCM-048A - Clutch even gears, torque signal. Plausible signal

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 transmission control module (TCM) has found that the difference between the clutch torque and the engine torque is unreasonable for the clutch for even gears. The comparison is made so that shifting can take place without damaging the clutch or the transmission.

Possible causes

Clutch lining is damaged
Engine torque differs from the calculated torque
The properties of the hydraulic oil are incorrect
Damaged clutch unit

What you can do

1Read out the fault codes from both the transmission and engine control modules, since the code may be stored alone or be a follow-on fault from another code
2Check the engine control module first, since a fault in the engine's torque signal can cause this code
3Have a workshop check that the hydraulic oil has the correct properties, since the wrong oil can cause this code
4Fault-tracing may show a fault in the transmission, in which case it must be replaced; otherwise the clutch unit may be damaged and a workshop should replace it

Symptoms you may notice5

Text window with yellow warning symbol and message
Gears shift hard or jerky, sometimes or all the time
No automatic gear changes
Gear changes take too long to complete, sometimes or all the time
Shifts occur 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.