There are several possibilities as to why you set that code. Copied this off All Data.
The hydraulic valve for solenoid S2 has stuck in the open or closed position.
Defective control system (the solenoid binds or is stuck).
Internal leakage in the transmission.
Warn or damaged clutch driven plates in the transmission.
General orange warning lamp lit.
Malfunction indicator lamp (MIL) lit.
Harsh gear shifting.
No lock-up function.
HINT: When the transmission control module (TCM) detects disrupted function, "Limp-home" mode is activated and only shift positions 3 and R are available. Lock-up function is also unavailable.
Harsh shifting- due to disabled line pressure solenoid STH control. This results in constant maximum line pressure and leads to harsher shifting and gear engagement.
Most likely problem is that you will need to replace the transmission. What you can try and see if it will work since you replaced the valave body is clear the codes and see if you can have the transmission control module software upgraded. Most likely place will be Volvo but see if you can find an independent shop that specializes in Volvo. Next if software is available or not have the adaptation reset on the transmission control module. The TCM adapts to your driving pattern so if you can have that erased you can start all over. If all that fails then sorry for the bad news but replace the transmission.
Sunday, April 19th, 2009 AT 11:24 AM