Powertrain
generic / SAE
P22AF
O2 Sensor Reference Voltage Performance (Bank 1 Sensor 2)
O2 sensor reference voltage on bank 1 sensor 2 is in range but plausibility check fails — drift or instability.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / AF
Possible causes
- Reference voltage drift high
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–2.5 h
- Component: oxygen sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012