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Thread: Ecu Codes and How to check them

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    shepherd79's Avatar
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    Apr 2002
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    01 Civic lx auto; 03 Accord EX
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    Falling Waters, WV USA
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    Ecu Codes and How to check them

    How to check your ECU codes:
    1. move driver seat all the way forward.
    2. locate the box on the floor.
    3. locate the small plastic window and pop it open.
    4. turn the ignition on.
    5. count how many times the light blinks.
    6. refer to the table below.

    ECU CODES for 86-89 accord and 85-89 prelude

    Ok I think we finally got this fixed now.. These are the correct codes..

    00 LED FLASH(s) ECU

    01 LED FLASH(s) 85-98 Accord
    Oxygen Sensor "A" (Primary)
    defective circuit or unplugged / defective sensor

    02 LED FLASH(s) 85-89 Accord
    Oxygen Sensor "B"
    defective circuit or unplugged / defective sensor

    03 LED FLASH(s) 85-98 Accord
    MAP Sensor (Manifold Absolute Pressure)
    defective circuit or unplugged / defective sensor

    04 LED FLASH(s) Crank Angle

    05 LED FLASH(s) 85-98 * Accord
    MAP Sensor (Manifold Absolute Pressure)
    mechanical problem / disconnected piping
    * exc. 94-95

    06 LED FLASH(s) 85-98 Accord
    ECT Sensor (Engine Coolant Temperature)
    defective circuit or unplugged / defective sensor

    07 LED FLASH(s) 85-98 Accord
    TP Sensor (Throttle Position)
    defective circuit or unplugged / defective sensor

    08 LED FLASH(s) 85-98 Accord
    TDC Sensor (Top Dead Center)
    defective circuit or unplugged / defective sensor

    09* LED FLASH(s) 85-98** Accord
    CYP Sensor (Cylinder)
    defective circuit or unplugged / defective sensor
    * not a valid code for any throttle body injection Hondas
    ** not a valid code for V-6 engines

    10 LED FLASH(s) 85-98 Accord
    IAT Sensor (Intake Air Temperature)
    defective circuit or unplugged / defective sensor

    12 LED FLASH(s) 85-98 Accord
    EGR Lift Sensor (Exhaust Gas Recirculation)
    defective circuit or unplugged / defective sensor

    13 LED FLASH(s) 85-98 Accord
    BARO Sensor (Atmospheric Pressure)
    defective circuit or unplugged / defective sensor

    14 LED FLASH(s) 88-98 Accord
    IAC Valve (Idle Air Control)
    defective circuit or unplugged / defective sensor
    IAC VALVE HELP

    15 LED FLASH(s) Ignition output signal

    16 LED FLASH(s) fuel injector

    17 LED FLASH(s) 88-98 Accord
    VSS (Vehicle Speed Sensor)
    defective circuit or unplugged / defective sensor
    Last edited by A20A1; 08-15-2005 at 06:00 PM.
    Alex.



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