Code result
P21FF
Fuel Control System B Too Rich at Higher Load
Moderate severity
What it means
The secondary fuel control loop B reports a rich condition at higher load on bank 2. Rich at high load typically points to a stuck-closed return on the fuel pressure regulator or over-delivering injectors.
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
Injectors over-deliver on bank 2
highOne of the most commonly reported causes for this code — check this first.
Related help
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