What are truck check engine codes spn 157 mean?
SPN: 157. FMI: 1/18. Lamp: Amber. REASON: The ECM has detected that fuel pressure is lower than commanded pressure. EFFECT: Possibly hard to start or low power.
How do you lower fuel rail pressure?
If the pressure in the rail is above the target value, the pulse width command to the fuel quantity valve will decrease to reduce the amount of fuel allowed into the rail. Since the injectors are running and spraying fuel into the cylinders to drive the engine, the pressure in the rail will decrease.
What’s the Check Engine code on a Cummins truck?
Discussion in ‘ Heavy Duty Diesel Truck Mechanics Forum ‘ started by Trucker28098, Jan 21, 2019 . I got a 2013 Peterbilt with a Cummins isx 15. For the last two weeks I’ve been getting a check engine light with code spn 157 FMI18 Fuel rail pressure, code reads fuel rail pressure valid but below average.
Can a Cummins ISX15 crank no start no codes?
1 07-29-2019, 01:46 AM (This post was last modified: 07-31-2019, 05:35 PM by Jas00500 .) Working on a isx15 cm2350 in a pro star. Looked at it quickly few days ago did not get too far yet. Truck cranks but no start and no fault codes in insite. Check rail Pressure was OK open fuel line at rail have fuel. Check engine speed was ok.
What are the faults of a Cummins Engine?
Incorrect amount of fuel in the nozzle in the One of the first three cylinders. Oil filters need to be replaced. Critical power loss. Loss of data in the engine control unit. Incorrect amount of fuel in the nozzle in one of the cylinders from the 4th to the 6th. Oil pressure sensor chain after oil filter-short circuit.
What’s the problem with my Cummins check engine light?
Truck sat for two weeks over holidays and I replaced both fuel filters and the fuel rail pressure sensor. Didn’t fix the problem so took the truck to an engine shop, they troubleshooted for 5 hrs and can’t find the problem, said all fuel pressures check out and couldn’t find the cause.