Common Problems With A Cummins ISX ECM And How To Prevent Them

  • Common Problems With A Cummins ISX ECM And How To Prevent Them

    Common Problems With A Cummins ISX ECM And How To Prevent Them

    The Cummins ISX ECM is one of the most important components of a Cummins ISX engine, and for it to run smoothly it has to be in good condition. However, old or new ECMs can be damaged by the environment, engine heat, shaking, and moisture. These are the 4 main problems you will come across and what you can do to beat them.

    4 Common Cummins ISX ECM Problems


    Factors such as weather and environment play a role in the proper functionality of the ECM’s electronic components. Try to keep your vehicle in a garage or under cover. Additionally, if you are going to experience flooding try to take the right precautions to preserve your truck.

    Failure of Components

    The semiconductors used in an ECM are the same as those employed in other electronic devices like phones and tablets but may have a shorter lifespan compared to what one would expect. ECMs are assessed for long-term performance through hourly testing. They were designed knowing they would eventually wear out under certain conditions.


    Heat is a big problem for most car / diesel parts. Under the hood of an operating vehicle can reach temperatures of 175 and 200 degrees celsius (347 – 392 fahrenheit). Too much heat will melt the ECMs components. Keep an eye on your engines temperature and avoid bringing on unnecessary amounts of heat to your vehicle.


    Moisture, such as rain water, can cause deterioration of the metal components and circuit boards in your ECM. To protect against buildup we strongly recommend using specialized sealant. It’s always a good idea to try and prevent any leaks in your vehicle as well. Keep these steps in mind for avoiding oil leaks.

    Repair Or Replace A Cummins ISX ECM?

    An ECM damaged by power surges, intense heat, lightning strikes, short-circuiting, or water damage will most likely need to be replaced. To find out if your ECM requires replacement or refurbishment, our mechanics can help determine the best course of action.

    If you’re trying to figure out whats wrong with your ECM we’d be happy to help! Let us do your diagnostic. We also have over 20 years of experience in Cummins ISX ECM repair.

    Comments (1)

    • Lonzo davidson

      When it gets wet outside my truck looses throttle response and engine light come on I replaced pdf throttle pedal and did a overlay to the ecm from the gas pedal and it still does this only when wet and cannot clear the codes out to 0 it stays at one cause one is active till it dries up. Then when it gets dry works fine can this be a bad ecm? I had a short once before with the taillights and it did cause a short in the Pdc but that was replaced.