VOLVO
TCM-0010 - Line pressure solenoid STH. Signal too low. Intermittent fault
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 XC (1998–2000), XC90 (2003–)
Show models by year and engine (12)
- Volvo C70 Cabriolet (1998–2005)1999–2000Transmission AW50-42 only
- Volvo C70 Coupé (1998–2002)1999All engines except: B5254S DENSO · Transmission AW50-42 only
- Volvo C70 Coupé (1998–2002)2000Transmission AW50-42 only
- Volvo S70 (1997–2000)1999–2000Transmission AW42 AWD, AW50-42 only
- Volvo S80 (1999–2006)1999–2000All transmissions except: AW55-50/51SN
- Volvo S80 (1999–2006)2001All transmissions except: AW50/51 AWD, AW55-50/51SN
- Volvo S80 (1999–2006)2002–2006Transmission 4T65EV, 4T65EV-GT only
- Volvo V70 (1997–2000)1999All engines except: B5202FS, B5252FS, D5252T MSA 15.7, GB5252S, GB5252S2 · Transmission AW42 AWD, AW50-42 only
- Volvo V70 (1997–2000)2000Transmission AW42 AWD, AW50-42 only
- Volvo V70 XC (1998–2000)1999Engine B5254T only · Transmission AW42 AWD only
- Volvo V70 XC (1998–2000)2000Transmission AW42 AWD only
- Volvo XC90 (2003–)2003–2006Transmission 4T65 AWD only
What does this fault code mean?
The signal to line pressure solenoid STH is too low. The fault is intermittent, so it may have occurred on an earlier occasion without being active right now. The solenoid controls the line pressure in the transmission, so the fault can affect how the gears feel.
Possible causes
- The control signal wire or the signal wire is short-circuited to ground
- Defective STH solenoid
What you can do
- 1The fault is intermittent: clear the fault code and road test the car to see whether it returns
- 2Check the connectors on the control module and on the transmission for contact resistance and oxidation
- 3Have a workshop measure the control signal wire and the signal wire to STH against ground, and replace the solenoid if the wires are intact
Symptoms you may notice4
- The general orange warning lamp is lit
- The malfunction indicator lamp (MIL) is lit
- No lock-up function
- Gear shifts are harsh
What the fault can affect3
- The control module's emergency program (Limp-home) is activated
- Line pressure is not regulated, so it stays at maximum all the time and gear shifts are harsher
- Gear slip times are not adapted when driving at high altitude
General guidance for car owners. Diagnosis on the car can point to a different cause.