Powertrain
generic / SAE
P0434
Heated Catalyst Temperature Below Threshold (Bank 2)
The heated catalyst on bank 2 has not reached its calibrated light-off temperature within the expected time after engine start. Heater element weak or insufficient supply.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 34
Possible causes
- Heater element ageing high
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: 200–2000 €
- Estimated time: 1–5 h
- Component: catalyst heater
- Component: catalytic converter
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012