OBD-II code · Powertrain (generic)
P0090 Fuel Pressure Regulator A Control Circuit/Open
Open circuit at fuel pressure regulator A. The actuator that controls rail pressure cannot be driven.
Is it safe to drive with P0090?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWiring break or unplugged connector
- PossibleRegulator solenoid open
- Less likelyPin pushed back out of connector body
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Pressure Regulator, Regulator Wiring
Related codes
- P2C02Fuel Pressure Regulator D Control Circuit/Open
- P008DFuel Cooler Pump Control Circuit Low
- P008EFuel Cooler Pump Control Circuit High
- P008FEngine Coolant Temperature/Fuel Temperature Correlation
- P0091Fuel Pressure Regulator A Control Circuit Low
- P0092Fuel Pressure Regulator A Control Circuit High
- P0093Fuel System Leak Detected - Large Leak
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.