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help ..Engine check light turns on

Discussion in 'Civic and CRX - EF' started by 91 civic dX Hatch, Dec 13, 2006.

  1. 91 civic dX Hatch

    91 civic dX Hatch New Member

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    i have a 91 civivc dx 5 speed 140k on it .. it runs great ..just that about 2 days ago the engine check light turned on when i was on the highway but it seemed like the engine is runns fine. after i got home i turned off the car and started it back up right way and the engine checkk light was gone ... untill i dove it again for another 15-20 minute it turn back on ... i keeps comeing on after i drive for 15-20 minute or if i accelerate fast after i start my car every time ..Can someone tell what it could be ? header sencer ?maybe somethings wrong after the engne gets hot ?
     
  2. lswhitecivic

    lswhitecivic Senior Member

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    After a google search...heres some directions for an EF civic.

    To determine if your ECU has an error code:

    1. Locate the ECU under the carpet in the passenger foot well.
    2. Find the red LED in the center of the ECU.
    3. Turn the ignition to ON. The red LED should flash once when this happens to indicate that the ECU has power.
    4. If there are no further flashes then there are no error codes.
    5. If there are further flashes then there are one or more error codes.

    To get the number of the stored error code you need to count the number of long flashes and the number of short flashes. The long flashes will occur before the short ones. A long flash represents 10, and a short flash indicates 1. So if the flashes look like _ _ - - (where _ is a long flash and - is a short one) then the error code is 22.

    If there are multiple error codes, then there will be a noticeable pause before the next code starts.

    Once you have the code go to the reference section and look up the error code in the Honda ECU Error code list.
     
  3. brownkobe8

    brownkobe8 New Member

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    well i had the same problem just cruisin around my check engine light was goin out and then stop at a store restart the car and engine was off then after a while it comes back on
    i was recievin one flash on my ECU and i replace my 02 sensor and then the problem was gone
    but ya where the passenger side on the front just peel the carpet and read the blinking red light to read them its if you get 3 short blinks its throwing 3 code but if you get 3 long blinks its throwing 30 code
    Heres all the code list





    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
    36 traction control found on JDM ecu's
    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
    71 random misfire cylinder 1
    72 random misfire cylinder 2
    73 random misfire cylinder 3
    74 random misfire cylinder 4
    80 Exhaust Gas Recirculation insufficient flow detected
    86 ECT Sensor (Engine Coolant Temperature) circuit range / performance problem
    90 Evaporative Emission Control System leak detected in the fuel tank area
    91 Fuel Tank Pressure Sensor low input
    92 Evaporative Emission Control System insufficient purge flow
     
  4. 91 civic dX Hatch

    91 civic dX Hatch New Member

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    when you say "long flash" do u mean a flash and then a long pause then a flash again
     
  5. lswhitecivic

    lswhitecivic Senior Member

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    A long pause means that its starting over, meaning if your only getting a long blink and then a long pause its code 10 which is your Intake Air Temp Sensor. A short blink will just like flicker on and off, a long flash will be on for like a whole second and then go out. So if its a short blink followed by a long pause, its a code 1 for your oxygen sensor.
     
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