P0088
Fuel Rail/System Pressure - Too High
1999-2000 BMW 323i E46 2.5L I6 🇨🇦
High SeverityPowertrain
Description
The fuel rail pressure is higher than the PCM commanded value.
Symptoms
- Check Engine Light
- Hard starting
- Rich running
- Injector damage risk
- Black exhaust smoke
Common Causes
- Faulty fuel pressure regulator
- Restricted fuel return line
- Stuck fuel pressure relief valve
Diagnostic Steps
- Monitor fuel pressure with scan tool
- Test fuel pressure regulator
- Check return line for restriction
- Inspect relief valve
Repair Notes
Replace fuel pressure regulator or clear fuel return restriction.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0088 on Other Vehicles
Common Questions
What does code P0088 mean on a 1999-2000 BMW 323i E46?
P0088 stands for "Fuel Rail/System Pressure - Too High". The fuel rail pressure is higher than the PCM commanded value.
What are the symptoms of P0088 on a BMW 323i E46?
Common symptoms of P0088 include: Check Engine Light, Hard starting, Rich running, Injector damage risk, Black exhaust smoke.
What causes P0088 on a 1999-2000 BMW 323i E46?
Common causes of P0088 include: Faulty fuel pressure regulator, Restricted fuel return line, Stuck fuel pressure relief valve.