Comanchie Mike Posted October 12, 2012 Posted October 12, 2012 I have an 88 Comanchie, auto, 4.0 Litre and the Emission Maint. Light came on the dash. Does any one know how to shut this off ? I Run a Thrush straight threw exhaust, no cat. or oxy sensor!!!! Any and all help would be appreciated. Thank You :doh:
Garvin Posted October 12, 2012 Posted October 12, 2012 The maintenance light makes no difference if you have an O2 or not, it's just a timer. All you have to do is find the box under the dash and yank it and the light will go out. The other option is to pull the bulb from the dash.
Zebvance Posted October 12, 2012 Posted October 12, 2012 I was told that it turns on when its time to replace your o2 sensor. How would you reset it if that's the case?
Eagle Posted October 12, 2012 Posted October 12, 2012 The maintenance light makes no difference if you have an O2 or not, it's just a timer. All you have to do is find the box under the dash and yank it and the light will go out. The other option is to pull the bulb from the dash. This is correct. Just unplug it. It isn't a Check Engine light, it's nothing but a reminder to replace the O2 sensor. The factory says to replace the light/timer and that it isn't serviceable, but people have figured out how to reset it if you wish to retain it. To the OP -- how does your engine run with no oxygen sensor? And by that, I don't mean "does it run well or badly." I don't think the system will function with no oxygen sensor. (Or does it default to open loop mode and you're just running a rich mix all the time?)
Garvin Posted October 12, 2012 Posted October 12, 2012 The ECU only reads the O2 sensor in closed loop so you are right, it will default to open loop and run rich.
87MJTIM Posted October 12, 2012 Posted October 12, 2012 I have an 88 Comanchie, auto, 4.0 Litre and the Emission Maint. Light came on the dash. Does any one know how to shut this off ? Try one inch of black electrical tape. Cover over the offending light. Problem solved. :laughin:
ComancheKid45 Posted October 13, 2012 Posted October 13, 2012 http://comancheclub.com/topic/35531-comanchie-mike/ :dunno: didnt get your answer here?
Eagle Posted October 13, 2012 Posted October 13, 2012 Since this question was already asked and answered a few days ago, we can close this thread.
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