Detailed guide for SPN 157 FMI 10
Back to top ↑The engine rail must hold a certain pressure for injectors to work correctly. When it’s under capacity, the truck shows hesitation, especially uphill or in cold starts.
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Share ↓SPN 157 FMI 10Severity: Critical
SPN 157 FMI 10: Fuel rail pressure under capacity – injector enabling insufficient
Quick Answer
Fuel rail pressure under capacity – injector enabling insufficient
Code
SPN 157 FMI 10
Severity
Critical
Applies to
Check OEM application
Can I drive?
Driving suitability is not established by this code alone.
Common Symptoms
- Poor power at load
- Engine hesitates
- Hard start cold
Likely Causes
- Injector control valve issue
- Supply line restriction
- High pressure rail leak
Common Fixes
- Verify fueling system pressure
- Inspect injector controls
- Repair leaks & rail faults
Full technical sections↓
What does SPN 157 FMI 10 mean?
Back to top ↑Fuel rail pressure under capacity – injector enabling insufficient
Video walkthrough for SPN 157 FMI 10
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DD13 DD15 DD16 engines low fuel pressure diagnostic repair spn 157 fmi 10 fmi 16 spn 164 fmi15
Channel: Francisco Amaya • View in BigRigFaults Media • YouTube source
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