Powertrain
generic / SAE
P2A06
O2 Sensor Circuit Range/Performance Bank 1 Sensor 4
The fourth oxygen sensor on bank 1, where present, returns implausible values during long-term plausibility evaluation. Used on multi-stage aftertreatment systems.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / 06
Possible causes
- Sensor aging high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping low
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–500 €
- Estimated time: 0.5–1.5 h
- Component: oxygen sensor
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012