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A lot Posted by Ari [Email] ![]() ![]() In Reply to: What specifically activates the "check engine" dash, david, Tue, 27 Nov 2001 11:42:53 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Just off the top of my head, a bunch of things can trip the "Check Engine" light - Any sensor that is out of range - O2, AMM, MAP, engine temp, etc. Or, if that sensor is in-range but not giving a reasonable answer, like the AMM indicating idle when the throttle is full open. Beyond that, there are numerous internal workings of the ECU not open to us mere mortals that can trip the check engine light.
It would help to know what year and model you have (turbo, etc), and if you've got a US or non-US car - the 9000 had a range of engine controls in different years. No US cars had a carburetor, so there were no chokes in the US. I don't think any non-US markets were carbureted, but I don't know for sure.
Low RPM won't trip the check engine light - however, there may be some problem that shows up only at low RPM. What, specifically, is happening? How low RPM?
Without more info, I'm just guessing, but I'd say you might have a bad/misadjusted throttle position switch (depending on year/engine), or there is a vacuum leak you still haven't found. Low RPM is usually small throttle position and high vacuum. At high vacuum, vacuum leaks are more noticeable.
More info, please!
posted by 140.157....
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