OBD-II code · Powertrain (generic, extended)
P20F0 SCR NOx Catalyst Over Temperature (Bank 2)
SCR NOx Catalyst Over Temperature (Bank 2): the component is overheating, typically from extended load or slip.
Is it safe to drive with P20F0?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyRunaway DPF regeneration upstream
- Less likelyTemperature sensor drift high
Symptoms
- Check engine light on
- Failed emissions inspection
- Possibly slightly increased fuel consumption
- Sulfur (rotten egg) smell from exhaust under load
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–8 h
- Emissions test
- Likely to fail
- Parts involved
- Scr Catalyst, Exhaust Temperature Sensor
Related codes
- P20EDReductant Heater "A" Control Stuck On
- P20EENOx Catalyst Efficiency Below Threshold (Bank 1)
- P20EFReductant Injection Valve Performance
- P20F1SCR NOx Pre-Catalyst Over Temperature (Bank 2)
- P20F2SCR NOx Catalyst Efficiency Below Threshold (Bank 2)
- P20F3SCR NOx Pre-Catalyst Efficiency Below Threshold (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.