VOLVO
ECM-P005322 - HO2S Heater Resistance (Bank 1, Sensor 1). General Signal Failures. Signal too high
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 (6)
- Volvo S80 (2007–)2007–2009Engine D5244T4, D5244T5 only
- Volvo V70 (2008–)2008–2009Engine D5244T4, D5244T5 only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The code concerns the calibration signal from the oxygen sensor on bank 1, sensor 1, and is set when that signal is too high. The engine control module uses the sensor to judge the fuel and air mixture, and the fault can only be checked when the sensor is calibrated, which a workshop does.
Possible causes
- Open circuit in the signal leads
- Contact resistance or oxidation in the signal lead
- Damaged oxygen sensor
What you can do
- 1With the ignition off, check the connections and wiring to the oxygen sensor for play, contact resistance and oxidation
- 2With a multimeter, check that the signal lead has no open circuit
- 3Check that the oxygen sensor is seated firmly and not damaged
- 4Have a workshop check the oxygen sensor during calibration if the fault remains after the wiring check
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- The engine control module uses the last measured value
General guidance for car owners. Diagnosis on the car can point to a different cause.