What does fault code TCM-047E mean?

Diagnostic fault code details for TCM-047E (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C30 (2007–2013)). Repair service at OBD Tuning.

VOLVO

TCM-047E - Transmission input speed. 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 incoming speed sensor, which sits at the clutch, gives a signal that deviates from the engine speed. The TCM takes its engine speed reading from the engine control module over the CAN bus and compares it with the sensor signal. The sensor signal is also used to check the other two speed sensors.

Possible causes

The incoming speed sensor is not working

What you can do

1Read out the fault codes from the transmission control module. If several speed sensors show faults, the cause may instead lie in the control module
2If you have diagnostic equipment, compare the incoming speed value in live data with the engine speed while the engine is running and see whether they match
3The incoming speed sensor must be replaced, which a workshop should do
4If the fault is inside the control module, it must be replaced; a new module is delivered without software and must be programmed by a workshop

Symptoms you may notice2

No automatic gear changes
No forward or reverse movement with a gear selected

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