Powertrain
generic / SAE
P2099
Post Catalyst Fuel Trim System Too Rich (Bank 2)
Bank 2 counterpart of P2097. Post-catalyst trim on bank 2 has reached the rich limit — usually a depleted catalyst or a downstream sensor biased rich on the bank 2 side.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 99
Possible causes
- Bank 2 catalyst oxygen storage exhausted high
- Bank 2 downstream sensor biased rich medium
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–1500 €
- Estimated time: 0.5–4 h
- Component: oxygen sensor downstream
- Component: catalytic converter
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012