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  1. #1
    Junior Member
    Join Date
    Sep 2010
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    2003 Honda Civic Hybrid overheating. Cannot find reason.

    On Sep-16 my hybrid started making grinding noises and went to half power.
    The temperature was high and the OBDII reader gave me P0335 [Crankshaft Position (CKP) sensor circuit, no signal]
    I bought a new TDC Sense and replaced it today as well as topping off my fluids.
    The coolant had gotten low.

    After a few miles of test driving,
    The check engine light came on and the car had the same symptoms.
    This time the OBDII reader came up with
    P1449 [Battery Module Overheating,Battery Cell Overheating, Battery Module Individual Voltage Input Deviation, Battery Module Deterioration, Battery Module Deviation]
    P1600 [TCM Internal Watchdog Operation]

    I doubt the battery would cause the noise.
    I'm leaning more towards to Transmission Control Module.
    What is the TCM and where is it located?

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  3. #2
    Junior Member
    Join Date
    Sep 2010
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    Alright, I've isolated it to

    Alright,
    I've isolated it to the the radiator fan.
    It seems that causes the overheating which causes all the other stuff.

    I tested all relays and fuses.
    They all work.
    I tested the fan motor.
    It works.
    I tested the voltage to the fan.
    it reads 0.

  4. #3
    Junior Member
    Join Date
    Sep 2010
    Posts
    0

    I got the fans working, And

    I got the fans working,
    And double checked all my fluids,
    But it still overheats.
    It didn't throw any OBDII codes this time,
    But I suspect that's because I got home before it did.
    Any ideas?

  5. #4
    Guest

    Have you checked the water

    Have you checked the water pump?

  6. #5
    Guest

    Hello i have a Honda civic

    Hello i have a Honda civic 2003 hybrid I have a problem check engine light came on and AMI i visited my local honda dealer. The dealer checkt the car
    and get the following DTC codes (p1600 and p1774) and I think he is too stupid.
    so if you please help me to know what is that problems so i can fix it.

  7. #6
    Guest

    Hace you checked the cooling

    Hace you checked the cooling fan for the battery? I hear mine go on once in a while and wonder if that may be your problem.

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