VOLVO
TCM-0024 - Transmission input speed sensor. Faulty signal. Intermittent fault
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
10 modelsC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008), V70 XC (1998–2000), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (24)
- 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 S60 (2001–2009)2001–2002
- Volvo S60 (2001–2009)2003All transmissions except: M58
- Volvo S60 (2001–2009)2004–2009Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo S70 (1997–2000)1999–2000Transmission AW42 AWD, AW50-42 only
- Volvo S80 (1999–2006)1999–2004
- Volvo S80 (1999–2006)2005–2006All transmissions except: M56
- 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 (2000–2008)2000–2002
- Volvo V70 (2000–2008)2003All transmissions except: M58
- Volvo V70 (2000–2008)2004–2007Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo V70 (2000–2008)2008Transmission AW55-50/51SN only
- Volvo V70 XC (1998–2000)1999Engine B5254T only · Transmission AW42 AWD only
- Volvo V70 XC (1998–2000)2000Transmission AW42 AWD only
- Volvo V70 XC / XC70 (2001–2007)2001–2002
- Volvo V70 XC / XC70 (2001–2007)2003–2007Transmission AW50/51 AWD only
- Volvo XC90 (2003–)2003, 2015
- Volvo XC90 (2003–)2004All transmissions except: M66 AWD
- Volvo XC90 (2003–)2005–2006All transmissions except: M66 AWD, TF-80SC AWD
- Volvo XC90 (2003–)2007Transmission AW50/51 AWD, AW55-50/51SN only
- Volvo XC90 (2003–)2008–2014Transmission AW50/51 AWD only
What does this fault code mean?
The control module registers a faulty signal from the speed sensor on the transmission when the vehicle speed is above a certain level. The fault is intermittent, so it may have occurred on an earlier occasion without being active now.
Possible causes
- Contact resistance in the connections
- Open circuit or short to ground or supply voltage in the power supply
- Open circuit or short to ground or supply voltage in the signal wire
- Defective speed sensor
- Incorrect transmission fitted after a replacement
What you can do
- 1The fault is intermittent: check the connectors on the transmission and the control module for contact resistance and oxidation, and see whether the harness is chafed where it bends
- 2If you have a diagnostic tool: follow the transmission input and output speeds in live data as the car accelerates and check that the values track each other
- 3Clear the fault code and road test the car to see whether it returns
- 4If the transmission has been replaced, have a workshop check that the correct one is fitted, and that the sensor wires are intact
- 5If the fault remains, have a workshop check the wiring to the sensor and replace the sensor if needed
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
- No torque reduction during shifting
- No lock-up function
- The Emergency mode I program in the transmission control module is activated
General guidance for car owners. Diagnosis on the car can point to a different cause.