Code result
P0001
Fuel Volume Regulator Control Circuit / Open
High severity
What it means
The ECU detects an open circuit in the control of fuel volume regulator A (often the metering valve on the high-pressure fuel pump). The actuator does not respond, so rail pressure cannot be controlled accurately.
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
Wiring break or unplugged connector
highOne of the most commonly reported causes for this code — check this first.
Regulator solenoid coil open
mediumA plausible cause — test and verify before replacing parts.
ECU output driver failed
lowLess common, but worth ruling out after the more likely causes.
Related help
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