Thread: No check engine light

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  1. #1 No check engine light 
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    Hi all
    Interesting happens:
    Had many problems with the car. So i go with my aeroforce clock to check the codes.
    I have no check engine light!!!!
    But these are the codes:
    P0300
    P0336
    P1133
    P1361
    P1362
    P1573
    ​This is very much and I don't know how to fix it.
    Maybe time to let the car go...
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  2. #2 Re: No check engine light 
    GrandPrix Junkie
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    Does the check engine light come on when you turn the key on but not start the car? It should illuminate until the car starts and then if no codes present will go out.

    Anyways, based on your codes, here you go:

    P0300- random/multiple misfires

    P0336- CRANKshaft position sensor (the one behind the balancer)

    P1133- upstream O2 sensor fault (the one in the top of the rear manifold)

    P1361- IGNITION CONTROL (IC) CIRCUIT NOT TOGGLING

    Ignition Control Module (ICM) sends signals that PCM requires
    for fuel control and spark advance calculations. At start of engine
    crank, ICM controls spark advance (by-pass mode). When second 3X
    signal is recognized by PCM, it applies 5 volts to by-pass circuit,
    commanding ICM to switch Ignition Control (IC) of spark advance to PCM
    (IC mode). A short in IC circuit, or an open or short ground in bypass
    circuit will set DTC 1361.

    Symptoms
    You likely won't notice any drivability problems.

    Causes

    PCM monitors IC pulses during crank while by-pass mode spark
    advance is commanded.

    Solutions

    Possible short in IC circuit.
    Check for faulty connections or damaged harness to ICM
    Replace ICM


    P1362- BY-PASS CIRCUIT SHORTED

    Ignition Control Module (ICM) sends signals that the PCM
    requires for fuel control and spark advance calculations. At the start
    of engine crank, the ICM control spark advance (by-*** mode). When the
    second 3X reference pulse is recognized by the PCM, PCM applies 5
    volts to by-pass circuit, commanding ICM to switch spark advance to
    PCM control (IC mode).
    If PCM detects a short to voltage in by-pass circuit, DTC will
    set.

    NOTE: A short to ground in the IC circuit or by-pass circuit will cause
    both DTCs P1361 and P1362 to set. Engine will start and run in by-pass
    mode timing.

    Symptoms
    You likely won't notice any drivability problems.

    Causes

    PCM detects a short to voltage in by-pass circuit.

    Solutions

    Locate and repair short in by-pass circuit.
    Replace IC control module.


    P1573- EBTCM/PCM SERIAL DATA CIRCUIT

    Powertrain Control Module (PCM) uses serial data line to
    communicate with various components and systems within vehicle. If PCM
    does not receive data from Electronic Brake and Traction Control
    Module (EBTCM) DTC P1573 will set.

    Symptoms
    You likely won't notice any drivability problems.

    Causes

    PCM has detected a PCM/EBTCM communication error for
    0.5 second.


    Solutions

    Check for faulty connection at EBTCM. (Electronic Brake and
    Traction Control Module)
    Replace EBTCM.



    Do you have the ground that comes from the crank sensor/cam sensor connected to the underside stud of the ICM? Should be a single black wire with a large ring terminal on it sandwiched between the 2 nuts that hold the ICM to the head. If it's there, then I would start by swapping an ICM in, clear codes and see what you get. A lot of those codes could be caused by the ICM.

    Check your harness over by the brakes/ABS system and make sure everything is tight/connected. Also, there should be a ground attached to one of the studs on the transmission to engine bolt. Want to say its around the 10-11'o clock position if looking from the drivers side fender.
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  3. #3 Re: No check engine light 
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    Hi FordMan77
    Thanks for you detailed List of the codes!
    Thats a real solution I can take a look.
    But why I have no Engine light when I'm driving?????
    Last edited by kappa67; 08-11-2024 at 02:48 PM.
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  4. #4 Re: No check engine light 
    GrandPrix Junkie
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    Does the check engine light come on (along with all the other normal warning lights) when you turn the key to "on" but not start the car? It should illuminate until the car starts and then if no codes present will go out.
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  5. #5 Re: No check engine light 
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    Yes it comes on. And then goes away why? There are many codes
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  6. #6 Re: No check engine light 
    Solving problems BrandonHall10's Avatar
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    Not every code "set" will force the MIL to light.

    The only thing(s) certain set a MIL are directly or indirectly related to emissions.

    The main purpose of the MIL is to tattle on you to the air police.
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  7. #7 Re: No check engine light 
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    Ok..but then I think the best thing would be to show the codes (if some) in a gauge or whatever.
    Then you can be sure no codes are on.
    Is there something?
    ​Now I have an aeroforce gauge for this...
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  8. #8 Re: No check engine light 
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    I changed the upstream O2 sensor but got the code P1133 anyway.
    ​What could this be??
    All the other codes are gone.
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  9. #9 Re: No check engine light 
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    I found this which should be helpful.
    DTC P1133 or P1153

    '01 Grand Prix GTP Special Edition
    Trying to stay pretty close to stock now. Just a few bolt-ons for fun.
    Trying to keep it alive, pretty, and fun.
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