Code result
P2C9F
Fuel Pressure Regulator D Exceeded Control Limits - Pressure Too High
High severity
What it means
Fuel pressure regulator D cannot maintain commanded pressure - actual rail pressure rises above the calibrated upper limit.
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
Regulator stuck closed
highOne of the most commonly reported causes for this code — check this first.
Fuel return path blocked
mediumA plausible cause — test and verify before replacing parts.
Related help
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