What does fault code TCM-05C0 mean?

Diagnostic fault code details for TCM-05C0 (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C30 (2007–2013)). Repair service at OBD Tuning.

VOLVO

TCM-05C0 - Multiplex function solenoid driver, clutch pressure/cooling even gears. Open circut

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?

Although the code is described as even gears, the fault concerns solenoid CSMS1, which controls the cooling flow over the clutch for the odd gears and decides whether valve CSM1 routes the pressure to shifting or to the clutch. The solenoid has an open circuit. The cause is a damaged solenoid, a damaged or dirty connector or circuit board, or a damaged control module in the transmission.

Possible causes

Damaged solenoid
Connector or circuit board damaged or dirty
Damaged transmission control module (TCM)

What you can do

1Read the fault codes, clear TCM-05C0 and drive the car to see whether it returns
2Have a workshop open the transmission control system and inspect solenoid CSMS1 and its contacts for corrosion, poor contact, dirt or metal build-up
3Have a workshop check the transmission oil level
4If the fault cannot be found or fixed, a workshop must replace the mechatronic unit

Symptoms you may notice5

Malfunction Indicator Light (check engine) lit or behaving abnormally
Yellow warning symbol and text message in the display
Shifts hard or jerky
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.