Powertrain
generic / SAE
P013A
O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 2
Post-cat O2 sensor on bank 1 responds too slowly when mixture transitions from rich to lean. Sensor aging or contamination.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 3A
Possible causes
- Sensor aged high
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–300 €
- Estimated time: 0.3–1.5 h
- Component: oxygen sensor b1s2
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012