Code result
P20F0
SCR NOx Catalyst Over Temperature
High severity
What it means
SCR NOx Catalyst Over Temperature (Bank 2): the component is overheating, typically from extended load or slip.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Runaway DPF regeneration upstream
highOne of the most commonly reported causes for this code — check this first.
Temperature sensor drift high
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P20F0 freeNo credit card required