What does fault code TCM-0466 mean?

Diagnostic fault code details for TCM-0466 (Volvo C30 (2007–2013), Volvo C30 (2007–2013), Volvo C30 (2007–2013)). Repair service at OBD Tuning.

VOLVO

TCM-0466 - Clutch filling pressure. Adapted pressure outside allowed range

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 adapted filling pressure for one of the clutches is outside the permitted range. The transmission has two clutches, clutch 1 for odd gears and clutch 2 for even gears. The time taken to fill and drain the preparatory pressure must stay within a tolerance.

Possible causes

Leak in the hydraulic system
Dirt in the hydraulic system
Damaged clutch unit

What you can do

1Read out the fault codes from the transmission control module. If fault codes for the solenoids are stored, a workshop should replace the mechatronic unit
2Look for oil traces or signs of a leak under the transmission, since a leak or dirt in the hydraulic system can give the wrong pressure
3If the fault remains after the mechatronic unit has been replaced, the transmission must be replaced, and a workshop should do this
4The clutch unit may be damaged and then needs to be replaced by a workshop

Symptoms you may notice2

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.