Powertrain
generic / SAE
P0432
Main Catalyst Efficiency Below Threshold (Bank 2)
Generic main catalyst efficiency code on bank 2 — used by some manufacturers in addition to or instead of P0420. Indicates the same root cause — degraded oxygen storage in the main catalyst.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 32
Possible causes
- Catalyst aged or contaminated high
- Oxygen sensor drift 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: hard
- DIY: shop recommended
- Estimated cost: 600–2500 €
- Estimated time: 1.5–5 h
- Component: catalytic converter
- Component: oxygen sensor upstream
- Component: oxygen sensor downstream
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012