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99 civic check engine light

Discussion in 'General Tech and Maintenance' started by davyd11, Jul 8, 2004.

  1. davyd11

    davyd11 Junior Member

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    i may be a retart but cannot find connector to jumper so i can tell what is wrong with car. 99 honda civic dx; check engine light just came on
     
  2. swanny

    swanny Senior Member

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    It's pretty easy.
    Although your car is OBD2b and is best checked with an OBD2 diagnostic "scan tool" you can check the codes yourself easily and even see what they mean.

    Look on your passenger side under dash area near where your ECU is located. You should look and feel around for a two-prong plug that will more than likely be green or blue or even brown.

    Take a piece of wire or a bent paper clip and touch one side each of your wire or paperclip to each of the pins on that plug. This will complete the "loop" and allow you to check your codes.

    Turn your key into the "on" position just before the car actually cranks, and count the flashing check engine lights.

    Long flashes mean 10, while short flashes mean 1. So if you had 2 long blinks quicly follwed by 3 short flashes you'd have a code 23. You may se more than one code, so be sure to count the flashes until you see the same code repeated again to be sure you got all the codes.

    The codes are as follows:

    Code Meaning
    1 O2A - Oxygen sensor #1
    2 O2B - Oxygen sensor #2
    3 MAP - manifold absolute pressure sensor
    4 CKP - crank position sensor
    5 MAP - manifold absolute pressure sensor
    6 ECT - water temperature sensor
    7 TPS - throttle position sensor
    8 TDC - top dead centre sensor
    9 CYP - cylinder sensor
    10 IAT - intake air temperature sensor
    12 EGR - exhaust gas recirculation lift valve
    13 BARO - atmospheric pressure sensor
    14 IAC (EACV) - idle air control valve
    15 Ignition output signal
    16 Fuel injectors
    17 VSS - speed sensor
    19 Automatic transmission lockup control valve
    20 Electrical load detector
    21 VTEC spool solenoid valve
    22 VTEC pressure valve
    23 Knock sensor
    30 Automatic transmission A signal
    31 Automatic transmission B signal
    41 Primary oxygen sensor heater
    43 Fuel supply system
    45 Fuel system too rich or lean
    48 LAF - lean air fuel sensor
    54 CKF - crank fluctuation sensor
    58 TDC sensor #2
    61 Primary oxygen sensor
    63 Secondary oxygen sensor
    65 Secondary oxygen sensor heater

    Also there are more in the 70's I *think* and they mean random misfires, which usually means you need spark plugs and/or wires or a general tune-up.
     
  3. malone68

    malone68 Junior Member

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    "Look on your passenger side under dash area near where your ECU is located. You should look and feel around for a two-prong plug that will more than likely be green or blue or even brown."

    Does the plug resemble a over sized phone jack with 2 outlets (with one of the outlets occupied by a plug) ? I found a green plug, like I just described, and a flat brown one. Thanks
     
  4. pissedoffsol

    pissedoffsol RETIRED

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    most cars it's brown, and simply has 2 plugs in it.... but it doesn't look like a phone jack at all...
     
  5. malone68

    malone68 Junior Member

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    Thanks pissedoff. You are the king!
     
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