VOLVO
TCM-0012 - Lock-up solenoid SL. 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 control module has detected a signal that is too high on the wire for lock-up solenoid SL even though the solenoid is meant to be off. The solenoid is then probably switched on all the time. The fault is intermittent, so it may have been present on an earlier occasion without being active now.
Possible causes
- The signal wire is short-circuited to supply voltage
What you can do
- 1The fault is intermittent: clear the fault code and road test the car to see 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 signal wire to lock-up solenoid SL against supply voltage, since a short to supply voltage can cause the code
Symptoms you may notice5
- The general orange warning lamp is lit
- The malfunction indicator lamp (MIL) is lit
- Gear shifts are harsh
- No gear shifts
- Gear shifts are irregular
What the fault can affect1
- The lock-up function is probably engaged all the time in second to fourth gear, which causes harsh gear shifts and engine braking in these gears
General guidance for car owners. Diagnosis on the car can point to a different cause.