Detailed guide for SPN 157 FMI 15
Back to top ↑This usually means the engine could not reach commanded rail pressure. The ECM flags it when injector enable doesn’t happen properly.
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Share ↓SPN 157 FMI 15Severity: Critical
SPN 157 FMI 15: Fuel rail pressure not reached – injection enabling failed
Quick Answer
Fuel rail pressure not reached – injection enabling failed
Code
SPN 157 FMI 15
Severity
Critical
Applies to
Check OEM application
Can I drive?
Driving suitability is not established by this code alone.
Common Symptoms
- Loss of power
- Fueling error flags
- Injection timing issues
Likely Causes
- Valve control failure
- Rail restriction
- Pump issues
Common Fixes
- Check control valves and sensors
- Confirm pump operation
- Replace bad components
Full technical sections↓
What does SPN 157 FMI 15 mean?
Back to top ↑Fuel rail pressure not reached – injection enabling failed
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