VOLVO
ECM-P005396 - HO2S Heater Resistance (Bank 1, Sensor 1). Component Failures. Component internal failure
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 finds that the front oxygen sensor on bank 1, sensor 1, has not reached normal operating temperature. The code is an internal component fault, so the fault sits in the sensor or in its connections.
Possible causes
- Contact resistance and oxidation in the connectors
- Damaged front heated oxygen sensor
What you can do
- 1Look at the oxygen sensor connector for contact resistance and oxidation, and correct what you find
- 2Read the fault code with a diagnostic tool before and after the repair and note whether it is active
- 3Make sure the fuses are intact. Their location is on the fuse chart or in the instruction manual
- 4With a multimeter, check that the wiring to the sensor has no open circuit and no short to ground
- 5If the connector gave no result, a new oxygen sensor is the next step
Symptoms you may notice1
- The malfunction indicator lamp lights up
General guidance for car owners. Diagnosis on the car can point to a different cause.