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Thread: Heater Check Engine Code

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    Sergeant Major BuiltMFG's Avatar
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    Default Heater Check Engine Code

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    I'm trying to get my junk emissions tested so all of the paperwork is finalized so I can get plates from the DMV. There is a code for the air intake heater that is being thrown and that's all that is holding me back. Just curious if anybody else has had this experience and where to look/start.


    2002 1078 A1

    E
    Last edited by BuiltMFG; 02-27-2017 at 14:46.

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    What model and year truck?

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    Sergeant Major BuiltMFG's Avatar
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    Sorry, 2002 1078 A1

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    Quote Originally Posted by BuiltMFG View Post
    Sorry, 2002 1078 A1
    I think you mean the intake heater. It is supposed to be activated with the ether switch. Specifically what is the code?
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    I didnt know there was a sensor for the heater. Maybe on the power board somehow it can see a lack of power to it. I would identify and check the breaker and relay that power the heater. If you have the green pcb power board they can develop bad solder joints and cause issues.

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    4 Star General snowtrac nome's Avatar
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    I don't believe the a- 1 had the intake heater it should have had an eather system as long as the code doesn't set a cel I would think it should be ok the 3126 was a pretty basic engine with no real emissions package just an electronic control system. it should be able to be fixed by havein some one with cat et de activating the grid heater function in the ecm.

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    I don't have the exact code the CAT mechanic pulled but the verbiage was "Air intake heater low voltage out of range."

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    Quote Originally Posted by BuiltMFG View Post
    I don't have the exact code the CAT mechanic pulled but the verbiage was "Air intake heater low voltage out of range."
    Check the heater circuit and the heater connection.
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    2006 M1078A1
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    here's my suggestion take the serial number off the engine run to the cat dealer see if it was equipped with such a thing if it is fix it. if not they can deactivate the function in the ecm with cat e-t. One thing to remember if it has the intake heater you do not want to add a starting fluid injection system to it. also if the need arises to use starting fluid you need to disable the preheater first or life is going to get very exiting fast

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    Sergeant Major BuiltMFG's Avatar
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    Quote Originally Posted by snowtrac nome View Post
    I don't believe the a- 1 had the intake heater it should have had an eather system as long as the code doesn't set a cel I would think it should be ok the 3126 was a pretty basic engine with no real emissions package just an electronic control system. it should be able to be fixed by havein some one with cat et de activating the grid heater function in the ecm.
    So doing some searching on SS once I realized I have an eather system as well. So are you suggesting the code thrown is asking for something that isn't there at all?

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