P0091

Serious, act now

Fuel Pressure Regulator Control Circuit Low

What this code means

The electrical circuit controlling the fuel pressure regulator (fuel metering valve) shows low voltage - a wiring or valve fault.

Common symptoms

Hard starting or no start
Limp mode with power loss
Engine stalling

Most common causes

Faulty fuel metering/regulator valve
Shorted or broken wiring
Failing high-pressure pump (diesels)

Can you keep driving?

On common-rail diesels this often ends in a no-start - have it diagnosed promptly.

Do not guess in the dark

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Find a repair shop

Run a shop? The OBD decoder, VIN tools and parts catalog are built into the Motoro dashboard. See Motoro for workshops

Descriptions are for guidance only. Accurate diagnosis requires a workshop inspection.