SPN 157 FMI 0 — Injector Metering Rail 1 Pressure - Data Valid But Above Normal Operating Range (XPI common rail fuel pressure too high)
What it means: Injector Metering Rail 1 Pressure - Data Valid But Above Normal Operating Range (XPI common rail fuel pressure too high).
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: 1) Check for a rail pressure sensor fault first with INSITE - a bad sensor reading can trigger false high-pressure logic without an actual overpressure event. 2) Run an INSITE actuator test on the fuel pump PCV to confirm it responds to command and is not mechanically stuck. 3) Do NOT crack any high-pressure fuel line to check - wait for a full pressure bleed-down (key off 60+ seconds) before any fuel system work
Don't risk it — look up listed providers near you and give them this SPN/FMI when you call.
Listed providers nearest Oklahoma City, OK
Closest first. Tell them SPN 157 FMI 0 and what the truck is doing. RoadService.app lists these providers and does not employ them or carry out the repair.
- 0.0 mi away — based in Oklahoma City, OK · (405) 551-3320
- 0.0 mi away — based in Oklahoma City, OK · (405) 682-1362
- 0.0 mi away — based in Oklahoma City, OK · (405) 632-6010
Applies to: Cummins Isx15 · Freightliner Cascadia · International ProStar (ISX15 2013-2019) · Kenworth T680 · Peterbilt 579
What SPN 157 FMI 0 means
Injector Metering Rail 1 Pressure - Data Valid But Above Normal Operating Range (XPI common rail fuel pressure too high).
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Rail pressure relief valve (PRV) stuck closed or failing to open at its set point
- Fuel pump pressure control valve (PCV) stuck in the closed/high-flow position
- ECM commanding excessive pressure due to a rail pressure sensor fault feeding bad feedback data
- a restriction downstream of the rail forcing pressure buildup
First moves (roadside)
- 1) Check for a rail pressure sensor fault first with INSITE - a bad sensor reading can trigger false high-pressure logic without an actual overpressure event. 2) Run an INSITE actuator test on the fuel pump PCV to confirm it responds to command and is not mechanically stuck. 3) Do NOT crack any high-pressure fuel line to check - wait for a full pressure bleed-down (key off 60+ seconds) before any fuel system work
FAQ
Injector Metering Rail 1 Pressure - Data Valid But Above Normal Operating Range (XPI common rail fuel pressure too high).
Serious — Power derate likely — plan to stop soon.
The most common cause is: Rail pressure relief valve (PRV) stuck closed or failing to open at its set point. Other possibilities include Fuel pump pressure control valve (PCV) stuck in the closed/high-flow position; ECM commanding excessive pressure due to a rail pressure sensor fault feeding bad feedback data; a restriction downstream of the rail forcing pressure buildup.
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Related codes
Codes that commonly appear alongside SPN 157 FMI 0, or share the same subsystem.
- Injector Metering Rail 1 Pressure - Data Valid But Below Normal Operating Range (XPI common rail fuel pressure too low) (SPN 157 FMI 1)
- Injection Rail Pressure — Below Normal (SPN 157 FMI 18)
- Fuel Delivery Pressure — Low (SPN 94 FMI 1)
- Injector #1 open circuit (SPN 651 FMI 5)
- Injector #2 open circuit (SPN 652 FMI 5)
- Injector #3 open circuit (SPN 653 FMI 5)
- Injector #4 open circuit (SPN 654 FMI 5)
- Injector #5 open circuit (SPN 655 FMI 5)
Same symptom: Fuel delivery
Other codes on the tank-to-injector path — pressure, filters, water and the pump.
- Fuel System Leak Detected - Large Leak (P0093) · Fuel System
- HP Fuel Rail Pressure Low During Power Enrichment (P1093) · Fuel System
- High-Pressure Fuel System Relief Valve Open (P2BAD) · Fuel System
- Injector #6 open circuit (SPN 656 FMI 5) · Fuel System
- Fuel Rail/System Pressure Too Low (P0087) · Fuel System
- Fuel Rail/System Pressure Too High (P0088) · Fuel System
Find a mechanic or related guides
General diagnostic guidance for heavy-duty diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack). Not a substitute for a scan-tool diagnosis on your specific truck.