Powertrain
generic / SAE
P2A38
O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 3
The control circuit for the wide-band oxygen sensor positive current pump on bank 1 sensor 3 is open. Pumping current cannot be applied for lambda regulation.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / 38
Possible causes
- Open in pump current wire high
- Internal open in pump cell medium
- Pin pushed back out of connector body low
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 150–700 €
- Estimated time: 0.5–3 h
- Component: oxygen sensor b1s3
- Component: wiring harness
- Component: ecm
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012