VOLVO
ECM-P177200 - Throttle Position Sensor Circuit Low Input. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (13)
- Volvo S60 (2011–)2011–2014Engine B6304T4 only
- Volvo S60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo S80 (2007–)2007Engine B6324S, B8444S only
- Volvo S80 (2007–)2008–2009Engine B6304T2, B6324S, B8444S only
- Volvo V60 (2011–)2011–2014Engine B6304T4 only
- Volvo V60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo V70 (2008–)2008–2009Engine B6304T2, B6324S only
- Volvo XC60 (2009–)2009–2010Engine B6304T2 only
- Volvo XC60 (2009–)2011–2015Engine B6304T4 only
- Volvo XC70 (2008–)2008Engine B6324S only
- Volvo XC70 (2008–)2009Engine B6304T2, B6324S only
- Volvo XC90 (2003–)2005–2006, 2011Engine B8444S only
- Volvo XC90 (2003–)2007–2010Engine B6324S, B8444S only
What does this fault code mean?
The engine control module (ECM) compares the signals from the two position sensors on the throttle body. The fault code is set when one of the signals is unreasonably low. The control module then uses the other signal, and the cruise control is switched off while the fault is active.
Possible causes
- Contact resistance or oxidation in the connections
- Signal wires short-circuited to earth
- Open circuit on the signal wires
- Voltage supply short-circuited to earth
- Open circuit on the voltage supply
- Damaged throttle body
What you can do
- 1Check that the connectors to the throttle body are firmly seated and free from oxide
- 2Use a multimeter to check that the signal wires are not short-circuited to earth and have no break
- 3Use a multimeter to check that the voltage supply to the throttle body is not short-circuited to earth
- 4If the fault code returns: have a workshop replace the throttle body
Symptoms you may notice4
- Engine performance is reduced
- The engine performs poorly and lacks power, especially when pulling away from standstill
- The engine hesitates, surges or runs unevenly during acceleration, deceleration or steady speed
- The cruise control does not work at all
What the fault can affect2
- The other sensor's signal is used instead
- The cruise control is switched off while the fault is active
General guidance for car owners. Diagnosis on the car can point to a different cause.