Code result
P20F1
SCR NOx Pre-Catalyst Over Temperature
Moderate severity
What it means
SCR NOx Pre-Catalyst Over Temperature (Bank 2): the component is overheating, typically from extended load or slip.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Runaway regeneration upstream
highOne of the most commonly reported causes for this code — check this first.
Related help
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