What does fault code TCM-046E mean?

Diagnostic fault code details for TCM-046E (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C30 (2007–2013)). Repair service at OBD Tuning.

VOLVO

TCM-046E - Non releasing clutch

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 one clutch fails to open. The transmission has two clutches, clutch 1 for odd gears and clutch 2 for even gears, and the control module opens a clutch by releasing its pressure. The fault may come from a missing or incorrect signal from the engine control module or from a damaged clutch unit.

Possible causes

Signal from the engine control module is missing or incorrect
Damaged clutch unit

What you can do

1Read out the fault codes from both the transmission and engine control modules and check whether fault code TCM-04A2 is set; trace it if so
2Check the engine control module first, since a missing or incorrect engine signal can cause this code
3If no fault is found in the engine control module, the clutch unit may be damaged and a workshop should replace it
4Fault-tracing may also show a fault in the transmission, in which case the transmission must be replaced; have a workshop do this

Symptoms you may notice5

Text window with yellow warning symbol and message
No forward or reverse movement with a gear selected
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

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