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
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References
sae:J2012