VOLVO
ECM-P014026 - O2 Circuit No Activity Detected (Bank 1, Sensor 2). General Signal Failures. Signal rate of change below threshold
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2011–), S80 (2007–), V70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S80 (2007–)2007–2008Engine B5254T6 only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8 only
- Volvo S80 (2007–)2010–2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10 only
- Volvo V70 (2008–)2008Engine B5254T6 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8 only
- Volvo V70 (2008–)2010–2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10 only
What does this fault code mean?
The engine control module (ECM) monitors the rear oxygen sensor by checking that the sensor has registered both rich and lean mixture. If it has not, the ECM changes the mixture. At fuel cut-off the sensor should show lean, and if the switch to lean takes too long the code is set.
Possible causes
- Leak in the exhaust system
- Damaged rear oxygen sensor
What you can do
- 1Read the code, clear it and road test the car to see whether it comes back
- 2Check the exhaust system for air leaks
- 3Check the connector to the rear sensor; do not use rust solvent spray or grease in it
- 4If no leak is found, try a new rear oxygen sensor, as a damaged sensor can also set the code
Symptoms you may notice1
- Check engine light (MIL) on
General guidance for car owners. Diagnosis on the car can point to a different cause.