What this code means

The DME detected that the actual fuel rail pressure deviates significantly from the commanded fuel rail pressure. The high-pressure fuel system is not maintaining the target pressure requested by the DME.

Symptoms

• Check Engine Light
• Loss of power
• Engine hesitation
• Hard starting
• Rough running at various RPMs

Common causes

• Failing high-pressure fuel pump
• Clogged fuel filter
• Leaking fuel injectors
• Fuel pressure regulator failure
• Low-pressure fuel pump weak

Diagnostic steps

1. Monitor commanded vs actual fuel rail pressure with scan tool
2. Test low-pressure fuel pump output
3. Inspect fuel filter condition
4. Check for fuel injector leaks
5. Test high-pressure pump output

Repair notes

Replace the failing fuel system component causing the pressure deviation.

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