VOLVO
TCM-P079700 - Pressure Control Solenoid "SL2" Stuck ON. General Failure Information. No sub type information
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2014–2015Transmission TG-81SC only
- Volvo S80 (2007–)2014–2015Transmission TG-81SC only
- Volvo V40 (2013–)2015Transmission TG-81SC only
- Volvo V40 Cross Country (2013–)2015Transmission TG-81SC, TG-81SC AWD only
- Volvo V60 (2011–)2014–2015Transmission TG-81SC only
- Volvo V60 Cross Country (2015–)2015Transmission TG-81SC only
- Volvo V70 (2008–)2014–2015Transmission TG-81SC only
- Volvo XC60 (2009–)2014–2015Transmission TG-81SC only
- Volvo XC70 (2008–)2014–2015Transmission TG-81SC only
What does this fault code mean?
The linear pressure solenoid SL2, which controls the system pressure to the clutches during gear changes, appears to have stuck in the on position. The control module therefore cannot regulate the clutch pressure correctly, and gears may be blocked.
Possible causes
- Wrong adaptation values held in the TCM's memory
- Contact resistance or poor contact in the connector to linear pressure solenoid SL2
- Linear pressure solenoid SL2 has stuck or is damaged
- Clutch C2 is broken
- Poor quality transmission fluid
- Mechanical fault in the transmission, or an internal fault in the control module or control system
What you can do
- 1First read all codes: if other transmission codes are present, deal with them first, since they may be the root fault
- 2Clear the code and road test the car to see whether it returns
- 3Have a workshop check the connector and wiring of solenoid SL2 and the transmission oil quality
- 4If the fault remains, have a workshop check the clutch and the control module
Symptoms you may notice5
- Yellow warning symbol and text message in the display
- The malfunction indicator lamp (Check engine) comes on or behaves abnormally
- The car may feel underpowered
- The engine stalls when a gear is engaged from idle
- No automatic gear change
What the fault can affect3
- The control module blocks gears that are not available
- Neutral check is blocked
- Automatic engine start/stop is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.