+- Rawze.com: Rawze's ISX Technical Discussion and more (http://rawze.com/forums)
+-- Forum: Big Truck Technical Discussion... (/forumdisplay.php?fid=1)
+--- Forum: ISX Related Help (/forumdisplay.php?fid=68)
+--- Thread: Isx Cm871 gas pedal limp mode for couple seconds while driving (/showthread.php?tid=10013)
Pages: 1 2
Isx Cm871 gas pedal limp mode for couple seconds while driving - Biamarckmm12 - 03-12-2025
Short story my truck is prostar 2009 it goes to limp mode for a couple secs while driving if I let go the pedal and press it againg it will accelerate but it keeps doing it some times ... we hooked up a computer to read codes it only show ecm power lost... we check all the batteries the are only 7 months old cables and everything looks good change all the grounds and it keeps doing it ... my mechanic suspects it's the ECM going bad ... I try the tap test but nothing happens ... any help please... thanks
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - tree98 - 03-12-2025
Maybe your throttle position sensor is on the fritz. Monitor it with insite and see if you can catch it acting up.
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - Biamarckmm12 - 03-12-2025
(03-12-2025 )tree98 Wrote: Maybe your throttle position sensor is on the fritz. Monitor it with insite and see if you can catch it acting up.forgot to mention i did change the whole pedal with the sensor it's still doing it
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - tree98 - 03-12-2025
Do any lights come on in the dash when this happens?
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - Biamarckmm12 - 03-12-2025
(03-12-2025 )tree98 Wrote: Do any lights come on in the dash when this happens?
The yellow arrow .. and gives a code
SPN 3513 FMI 5 sensor supply voltage 5
SPN 3597 FMI 2 ECU power output supply voltage [/code][/php]
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - tree98 - 03-12-2025
What is the actual code shown using insite??
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - Biamarckmm12 - 03-12-2025
(03-12-2025 )tree98 Wrote: Do any lights come on in the dash when this happens?
The yellow arrow .. and gives a code
SPN 3513 FMI 5 sensor supply voltage 5
SPN 3597 FMI 2 ECU power output supply voltage [/code][/php]
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - tree98 - 03-12-2025
Do you have cummins insite?
RE: Isx Cm871 gas pedal limp mode for couple seconds while driving - hhow55 - 03-12-2025
Your ecm maybe going bad. Sounds like a problem with the direct link that runs directly from the ecm to the batteries.
Best Wishes