DTC code
P0091
Fuel Pressure Regulator Control Circuit Low
Technical guide
Symptoms
- Hard start
- rough idle
- fuel system fault
Probable causes
- Fuel pressure regulator 1 control circuit low
- wiring short to ground
- failed FPR solenoid
Diagnostic steps
- Check FPR wiring for short.
- Test solenoid resistance.
- Replace FPR solenoid.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0091
Nothing confirmed yet for this code. No guess is offered on purpose.
Open a case