Powertrain
generic / SAE
P23A1
O2 Sensor Exhaust Sample Error Bank 2 Sensor 2
O2 Sensor Exhaust Sample Error Bank 2 Sensor 2: the control module has detected this fault condition. (Code P23A1)
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / A1
Possible causes
- Sensing element or protective tube fouled 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: 120–350 €
- Estimated time: 0.6–1.5 h
- Component: oxygen sensor b2s2
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012