Text only | Text with Images

BCM Community

Bus Discussion => Bus Topics ( click here for quick start! ) => Topic started by: rgrimard on April 17, 2020, 12:37:37 PM

Title: Cat 3176 engine codes 72,73,74 wont start ecm? speed sensor?
Post by: rgrimard on April 17, 2020, 12:37:37 PM
Hello,
I have a MCI 102c3 with a Cat 3176 that all of a sudden won't start (only for a second with either) and flashes 72,73,74. All the injectors are faulty... so it is probably an ECM issue. However, has anyone seen a faulty speed sensor cause this? Just trying to avoid yanking the ECM (not the easiest unit to get to in a bus) if at all possible.
Thank you,
Ray
Title: Re: Cat 3176 engine codes 72,73,74 wont start ecm? speed sensor?
Post by: chessie4905 on April 17, 2020, 05:11:41 PM
I would inspect all the wiring grounds and connectors for the injectors first.
Title: Re: Cat 3176 engine codes 72,73,74 wont start ecm? speed sensor?
Post by: luvrbus on April 18, 2020, 05:35:39 AM
Sounds like the ECM is bad bummer
Text only | Text with Images