Code result
P21FB
Fuel Control System B Too Rich at Idle
Moderate severity
What it means
The secondary fuel control loop B reports a rich condition at idle on bank 2. Idle rich often means injectors that leak at low duty cycle.
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 leak on bank 2
highOne of the most commonly reported causes for this code — check this first.
Related help
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