P0090moderate severityPowertrain
Fuel Pressure Regulator 1 Control Circuit
on 1999 BMW 540iT E39 4.4L V8 · RWD
What this code means
The PCM detected a malfunction in the fuel pressure regulator control circuit.
Symptoms
- Check Engine Light
- Unstable fuel pressure
- Poor running
Common causes
- Faulty regulator solenoid
- Wiring damage
- PCM failure
Diagnostic steps
- Test solenoid resistance
- Check wiring
- Test PCM output
Repair notes
Replace regulator or repair wiring.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1