Code result
P20C9
Reductant Control Module Requested MIL Illumination
Moderate severity
What it means
The dedicated reductant/SCR control module has requested that the master PCM illuminate the malfunction indicator lamp — a generic forward of an internal SCR fault. Read the SCR module subcodes for the actual cause.
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
Internal SCR module fault — read subcodes
highOne of the most commonly reported causes for this code — check this first.
Related help
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