Powertrain
generic / SAE
P200E
Catalyst System Over Temperature (Bank 1)
A temperature sensor in the exhaust catalyst on bank 1 reports a value above the safe operating limit. Sustained over-temperature can sinter the precious-metal washcoat and destroy conversion efficiency.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 0E
Possible causes
- Persistent misfire dumps unburned fuel into the cat high
- Sustained rich mixture from leaking injector or fuel pressure regulator medium
- Catalyst temperature sensor drifts high low
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–3000 €
- Estimated time: 1–6 h
- Component: catalytic converter
- Component: exhaust temperature sensor
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012