P0089
PowertrainFuel Systemmoderate severityFuel Pressure Regulator 1 Performance
What P0089 Means
The fuel pressure regulator is not maintaining the commanded fuel pressure.
Symptoms
- Check Engine Light
- Fluctuating idle
- Hesitation
- Poor fuel economy
Common Causes
- Faulty fuel pressure regulator
- Vacuum line issue
- Fuel pump weak
- Restricted fuel supply
Diagnostic Steps
- Monitor fuel pressure at idle and under load
- Test vacuum line to regulator
- Check fuel pump output
- Inspect fuel lines
Where to start: Replace fuel pressure regulator.
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