VOLVO
TCM-000D - Line pressure solenoid STH. Signal too high. 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 high. The fault is intermittent, meaning it has occurred but may not be present right now. The solenoid controls the line pressure in the transmission, so the fault can affect gear shifting.
Possible causes
- The control signal wire or the signal wire is short-circuited to supply voltage
- The control signal wire and the signal wire are short-circuited to each other
- Defective STH solenoid
What you can do
- 1The fault is intermittent, so road test the car after the fault code has been cleared and check whether it returns
- 2Check that the connectors to the transmission and the control module are secure and free from corrosion
- 3Have a workshop check the wires to line pressure solenoid STH against supply voltage and against each other, and replace the solenoid if needed
- 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 gear shifts
- No lock-up function
What the fault can affect2
- The control module's emergency program (Limp-home) is activated
- There is a risk of too low line pressure in the transmission, which causes increased wear
General guidance for car owners. Diagnosis on the car can point to a different cause.