VOLVO
TCM-000F - Line pressure solenoid STH. Signal missing. 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 control module has not received a signal from line pressure solenoid STH. The fault is intermittent, so it may have been present on an earlier occasion without being active now.
Possible causes
- Contact resistance in the connections
- Open circuit in the control signal wire or the signal wire
- Defective STH solenoid
What you can do
- 1Because the fault is intermittent it may be gone when you check: clear the fault code and road test the car to see whether it returns
- 2Check the connectors to the transmission and the control module for a firm fit and corrosion; twist the harness at them to see if the fault comes and goes
- 3If the fault remains, have a workshop check the control signal wire and the signal wire to line pressure solenoid STH for open circuits and contact problems, and check the solenoid
- 4Remedy as necessary and clear the fault code once the fault is fixed
Symptoms you may notice4
- The general orange warning lamp is lit
- The malfunction indicator lamp (MIL) is lit
- No lock-up function
- Gear shifts may feel harsh
What the fault can affect3
- The control module's emergency program (Limp-home) is activated
- Line pressure stays at its maximum all the time, which makes gear shifts 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.