Question about 1994 Jaguar XJ6

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95 XJ6 CHECK ENGINE LIGHT STAYS ON

WE CHECKED THE ECU FOR CODES AND SAYS NO CODES SO i REPLACED THE ECU HOPING THE OLD ONE WAS NOT ABLE TO PULL CODES HOWEVER THE NEW ECU DIDN'T HELP THE LIGHT IS STILL ON AND THERE ARE NO CODES. I THOUGHT IT BLINKED BRIEFLY WHEN I CHANGED THE ECU AND THEN STAYED ON BUT IM NOT SURE NOW. IT'S CONFUSING ME

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  • mightburs Dec 22, 2008

    I have a snap on same one I use on other jags merc bmw's and volvo's it just doesn't dedect any faults but the light is consistantly on?????

  • mightburs Mar 16, 2009

    Thanks, I'll try it again. I thought last time I disconnected the battery the light still came on immediatery. It's almost like when you turn the key on and all the lights go into test mode untill you crank that the check engine light stays stuck in test mode. Does this make any sense?

  • Anonymous Apr 19, 2009

    I'm currently having the same issue in my 1989 Honda CRX. I checked for codes and there are none. However, when I start the car the check light comes on within 5 seconds. Again, this only happens when the car is running. It's becoming really frustrating because there are no codes to show for the malfunction. Once the light comes on, it stays on until the car is shut down and restarted again. Bummer!

  • yadayada
    yadayada May 11, 2010

    u need to take this to a shop, u have a hard fault in the system, this can be a shorted sensor or a defective ECM (electronic control unit)

  • yadayada
    yadayada May 11, 2010

    Are U sure the scanner has the right testing protocol for your car? take it to a shop that has better test gear with live data capabilities

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I had this issue with a 95 once, (cant read the code but light stays on) I reset the code and about a week later the code came back on and I was able to read it.

Posted on Mar 11, 2009

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Need to find obd in 1990 honda accord


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Fig. 8: On Accords, the service connector is located under the dash on the passenger side 86804049.gif
Fig. 9: The service connector on Preludes is located behind the center console 86804050.gif
  1. Use a jumper wire to connect the two terminals of the service connector together.
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    Fig. 11: Fault code chart for 1994-95 Accords (four cylinder) 86804052.gif
    Fig. 12: Fault code chart for 1992-95 Preludes 86804053.gif

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