P0090: Fuel Pressure Regulator 1 Control Circuit Open
Severity: high
What it means: There's an electrical problem (open circuit) in the fuel pressure regulator control circuit.
Safe to drive? Use caution. The engine may stall or lose power.
Common symptoms
- Check-engine light
- Hard start or stalling
- Loss of power
Likely causes, ranked
- Wiring or connector faultDIY
- Faulty fuel pressure regulator or high-pressure pump control valveShop
- Engine computer fault (rare)Shop
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What it means: There's an electrical problem (open circuit) in the fuel pressure regulator control circuit.
Severity: High. Safe to drive? Use caution. The engine may stall or lose power.
DIY or shop?
Wiring checks first. Diesel and direct-injection parts are usually shop work.
Before you replace parts
- Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
- Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
- Clear the code only after a repair, then confirm it stays off after a few drives.
- Check your VIN for recalls and service bulletins.
Safety / mechanic note
Verify with a mechanic. This code can involve stalling, engine damage or loss of power. If the check-engine light is flashing, or the car stalls or runs badly, stop driving and have it inspected.
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