VOLVO
ECM-P014400 - O2 Sensor Circuit High Voltage (Bank 1 Sensor 3). General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (15)
- Volvo S60 (2011–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9 only
- Volvo S80 (2007–)2010Engine B6324S2 only
- Volvo S80 (2007–)2011–2013Engine B6324S4 only
- Volvo S80 (2007–)2014–2015Engine B4204T11, B4204T12, B4204T15, B6324S4 only
- Volvo V40 (2013–)2015Engine B4204T11 only
- Volvo V40 Cross Country (2013–)2015Engine B4204T11 only
- Volvo V60 (2011–)2014–2015Engine B4204T11, B4204T12, B4204T15, B4204T9 only
- Volvo V70 (2008–)2010Engine B6324S2 only
- Volvo V70 (2008–)2014–2015Engine B4204T11 only
- Volvo XC60 (2009–)2010Engine B6324S2 only
- Volvo XC60 (2009–)2011–2013Engine B6324S4 only
- Volvo XC60 (2009–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, B6324S4 only
- Volvo XC70 (2008–)2010Engine B6324S2 only
- Volvo XC70 (2008–)2011–2013Engine B6324S4 only
- Volvo XC70 (2008–)2014–2015Engine B4204T11, B6324S4 only
What does this fault code mean?
Although the code is named for a high voltage, it concerns the voltage from the oxygen sensor in bank 1, sensor 3, which must at some point drop below a certain value. The check is made when the sensor heater is active and the car has had a longer fuel cut-off while driving. The code can only be set on cars with three oxygen sensors, and only once the test has started and the conditions are met.
Possible causes
- Signal wire shorted to supply voltage
- Contact resistance and oxidation in the connections
- Damaged rear oxygen sensor, sensor 3
What you can do
- 1Read the code, clear it and road test the car to see whether it comes back
- 2Check the connector to the sensor for contact resistance and oxidation; do not use rust solvent spray or grease
- 3Use a multimeter to check that the signal wire has no contact with battery voltage
- 4If the connector and wire are intact, replace the rear oxygen sensor
Symptoms you may notice1
- Check engine light (MIL) on
What the fault can affect1
- Control with the rear oxygen sensor is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.