Code result
P018F
Fuel System Over Pressure Relief Valve Frequent Activation
High severity
What it means
The mechanical pressure relief valve has activated repeatedly within a short window — pressure regulation is failing more than once.
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 intermittently sticking
highOne of the most commonly reported causes for this code — check this first.
Related help
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