Powertrain
generic / SAE
P0090
Fuel Pressure Regulator A Control Circuit/Open
Open circuit at fuel pressure regulator A. The actuator that controls rail pressure cannot be driven.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 90
Possible causes
- Wiring break or unplugged connector high
- Regulator solenoid open medium
- Pin pushed back out of connector body low
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
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–600 €
- Estimated time: 0.5–3 h
- Component: fuel pressure regulator
- Component: regulator wiring
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012