VOLVO
ECM-P015700 - O2 Circuit Low Voltage (Bank 2, Sensor 2). General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (13)
- Volvo S80 (2007–)2007–2010Engine B6324S, B8444S only
- Volvo S80 (2007–)2011Engine B6324S5, B8444S only
- Volvo S80 (2007–)2012–2015Engine B6324S5 only
- Volvo V70 (2008–)2008–2010Engine B6324S only
- Volvo V70 (2008–)2011–2014Engine B6324S5 only
- Volvo XC60 (2009–)2010Engine B6324S only
- Volvo XC60 (2009–)2011–2015Engine B6324S5 only
- Volvo XC70 (2008–)2008–2010Engine B6324S only
- Volvo XC70 (2008–)2011–2015Engine B6324S5 only
- Volvo XC90 (2003–)2005–2006Engine B8444S only
- Volvo XC90 (2003–)2007–2010Engine B6324S, B8444S only
- Volvo XC90 (2003–)2011Engine B6324S5, B8444S only
- Volvo XC90 (2003–)2012–2014Engine B6324S5 only
What does this fault code mean?
The engine control module (ECM) monitors the rear oxygen sensor in bank 2, sensor 2, by checking its signal. The code is set if the limit values are not reached after a certain time, even though the sensor heater has reached its values. The code therefore concerns a low voltage in the signal from the rear sensor.
Possible causes
- Signal wire shorted to ground
- Open circuit in the signal wire
- Damaged rear oxygen sensor
What you can do
- 1Read the code, clear it and road test the car to see whether it comes back
- 2Use a multimeter to check that the signal wire to the rear sensor has no open circuit and is not shorted to ground
- 3Check the connector to the sensor for contact resistance and oxidation; do not use rust solvent spray or grease
- 4If the fault remains, try a new 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.