VOLVO
ECM-P032714 - Knock Sensor 1 Circuit Low (Bank1). General Electrical Failures. Circuit short to ground or open
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–)
Show models by year and engine (20)
- Volvo S60 (2011–)2011Engine B4164T, B4164T3, B4204T6, B4204T7 only
- Volvo S60 (2011–)2012–2014Engine B4164T, B4164T2, B4164T3, B4204T7 only
- Volvo S60 (2011–)2015Engine B4164T, B4164T2, B4164T3 only
- Volvo S80 (2007–)2010Engine B4204T6 only
- Volvo S80 (2007–)2011Engine B4164T, B4204T6, B4204T7 only
- Volvo S80 (2007–)2012–2014Engine B4164T, B4164T2, B4204T6, B4204T7 only
- Volvo S80 (2007–)2015Engine B4164T only
- Volvo V40 (2013–)2013Engine B4164T, B4164T3 only
- Volvo V40 (2013–)2014–2015Engine B4164T, B4164T3, B4164T4 only
- Volvo V40 Cross Country (2013–)2013–2015Engine B4164T only
- Volvo V60 (2011–)2011Engine B4164T, B4164T3, B4204T6, B4204T7 only
- Volvo V60 (2011–)2012–2014Engine B4164T, B4164T2, B4164T3, B4204T7 only
- Volvo V60 (2011–)2015Engine B4164T, B4164T2, B4164T3 only
- Volvo V70 (2008–)2010Engine B4204T6 only
- Volvo V70 (2008–)2011Engine B4164T, B4204T6, B4204T7 only
- Volvo V70 (2008–)2012–2014Engine B4164T, B4164T2, B4204T7 only
- Volvo V70 (2008–)2015Engine B4164T, B4164T2 only
- Volvo XC60 (2009–)2010Engine B4204T6 only
- Volvo XC60 (2009–)2011–2012Engine B4204T6, B4204T7 only
- Volvo XC60 (2009–)2013–2015Engine B4204T7 only
What does this fault code mean?
The signal from the left knock sensor is too low, which can be caused by the cable being short-circuited to ground or by a break (open circuit). The engine control module (ECM) compares the signal with its limit values and sets the fault code when the signal lies outside them.
Possible causes
- Signal cable short-circuited to ground
- Contact resistance in the knock sensor connections
- Break in the signal cable
- Short circuit between the knock sensors' signal cables
- Damaged knock sensor
What you can do
- 1Clear the fault code and drive the car; check whether it returns
- 2Measure the cable from the control module to the left knock sensor: it should be unbroken, and with a multimeter it should have no contact with ground (the body)
- 3Check the earth wire and the connectors in the harness for contact resistance and oxidation
- 4If you have a diagnostic tool: read the knock signal in live data with the engine running and see whether the value is missing or stays at a constant low level
- 5Have a workshop with diagnostic equipment check and repair the wiring to the knock sensor
Symptoms you may notice1
- Poor performance and lack of power while driving
What the fault can affect2
- Ignition timing is retarded as a safety measure
- Boost pressure is reduced
General guidance for car owners. Diagnosis on the car can point to a different cause.