VOLVO
TCM-002C - 5th gear. Incorrect gear ratio
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
Applies to the following models:
15 modelsC30 (2007–2013), C70 (2006–2013), C70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S40 (1996–2004), S40 (2004–2013), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V40 (1996–2004), V50 (2004–2013), V70 (1997–2000), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (33)
- Volvo C30 (2007–2013)2007–2013Transmission AW55-50/51SN only
- Volvo C70 (2006–2013)2006–2013Transmission AW55-50/51SN only
- Volvo C70 Cabriolet (1998–2005)2000–2005Transmission AW55-50/51SN only
- Volvo C70 Coupé (1998–2002)2000–2002Transmission AW55-50/51SN only
- Volvo S40 (1996–2004)2001–2004
- Volvo S40 (2004–2013)2004, 2011–2012Transmission AW55-50/51SN only
- Volvo S40 (2004–2013)2005–2010Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo S60 (2001–2009)2001–2002
- Volvo S60 (2001–2009)2003, 2009All transmissions except: M58
- Volvo S60 (2001–2009)2004–2005Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo S60 (2001–2009)2006–2008All transmissions except: M58, M66 AWD
- Volvo S70 (1997–2000)2000Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo S80 (1999–2006)1999–2000Transmission AW55-50/51SN only
- Volvo S80 (1999–2006)2001–2006Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo V40 (1996–2004)2001–2004
- Volvo V50 (2004–2013)2004, 2011–2012Transmission AW55-50/51SN only
- Volvo V50 (2004–2013)2005–2010Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo V70 (1997–2000)2000Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo V70 (2000–2008)2000–2002, 2008
- Volvo V70 (2000–2008)2003All transmissions except: M58
- Volvo V70 (2000–2008)2004–2005Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo V70 (2000–2008)2006–2007All transmissions except: M58, M66 AWD
- Volvo V70 XC / XC70 (2001–2007)2001–2002
- Volvo V70 XC / XC70 (2001–2007)2003–2005Transmission AW50/51 AWD only
- Volvo V70 XC / XC70 (2001–2007)2006–2007Transmission AW50/51 AWD, TF-80SC AWD only
- Volvo XC90 (2003–)2003All transmissions except: 4T65 AWD
- Volvo XC90 (2003–)2004–2005Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo XC90 (2003–)2006All transmissions except: 4T65 AWD, M66 AWD
- Volvo XC90 (2003–)2007All transmissions except: M66 AWD, TF-80SC
- Volvo XC90 (2003–)2008–2010Transmission AW50/51 AWD, TF-80SC AWD only
- Volvo XC90 (2003–)2011All transmissions except: M66 AWD
- Volvo XC90 (2003–)2012, 2015
- Volvo XC90 (2003–)2013–2014Transmission AW50/51 AWD only
What does this fault code mean?
The control module works out the gear ratio for fifth gear from the input and output speed signals and compares it with the expected ratio for that gear. When the ratio deviates, fifth gear is not working as it should.
Possible causes
- Contact resistance in the circuit to solenoids S1 to S5 and SLS
- Solenoid S2 has stuck in the OFF position
- Solenoid S3 has stuck in the ON position
- Solenoid SLS has stuck in the ON position
- Mechanical fault in the transmission, where worn components cause slipping or too low line pressure
What you can do
- 1Move the selector through all positions and see whether the display updates. If it shows an undefined position, such as O2, the gear-shift position sensor is misadjusted
- 2Read the fault codes in all control modules before replacing anything
- 3Have a workshop check that the software in the transmission control module is right for the car, and reprogram the module with new software if needed
- 4Clear the fault code and road test the car to see whether it returns
- 5If the fault remains, have a workshop check the solenoids and the connectors for contact resistance and oxidation, and repair or replace whatever is faulty
Symptoms you may notice5
- The general orange warning lamp is lit
- The malfunction indicator lamp (MIL) is lit
- No lock-up function
- Gear shifts are harsh
- The gears slip abnormally
What the fault can affect2
- The Limp-home function in the control module is activated
- Emergency mode I starts in the transmission control module
General guidance for car owners. Diagnosis on the car can point to a different cause.