VOLVO
ECM-P005329 - HO2S Heater Resistance (Bank 1, Sensor 1). General Signal Failures. Signal signal invalid
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 code concerns the heater element control of the front oxygen sensor on bank 1, sensor 1, which has been missing for a certain time. The signal is then treated as invalid. The causes are contact resistance in the connectors or a damaged sensor.
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 oxidation and contact resistance, and correct what you find
- 2Rust solvent spray or grease does not belong in the oxygen sensor connector
- 3Read the fault code with a diagnostic tool and note whether it is active or only stored
- 4With a multimeter, check that the wiring to the sensor has no open circuit
- 5If the connector and wiring are intact but the fault remains, replace the front oxygen sensor
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.