Powertrain
generic / SAE
P2C63
O2 Sensor Pumping Current Trim Circuit Low Bank 1 Sensor 3
The wide-band oxygen sensor on bank 1 sensor 3 reports a pumping current trim circuit low condition. Lambda regulation accuracy is impaired.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberC / 63
Possible causes
- Trim wire shorted to ground high
- Internal short in pump cell trim medium
- Connector pins corroded - high contact resistance 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