Does anyone know what could cause the CEL to come on but go out once the revs drop back to idle?
Happens every now and then but does not log any codes. So I don't know what it is.
Check Engine Light
Started by MrSober88, Jul 26 2013 01:59 PM
8 replies to this topic
#1
MrSober88
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Posted 26 July 2013 - 01:59 PM
#2
TSG
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Posted 26 July 2013 - 02:32 PM
Sounds like a dodgy knock sensor if it goes when the car settles.
#3
MrSober88
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Posted 26 July 2013 - 03:19 PM
Oh I found something about this on here I think. My exhaust might be causing it, I noticed today I may not have screwed the downpipe into the block. It had a hanger but doesn't seem to have a bolt in it.
As it doesn't happen everytime, only every now and then. I will bolt it down and see if it goes away.
Cheers.
#4
Guest_KONG_*
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Posted 26 July 2013 - 10:59 PM
Mine was doing a similar thing and eventually the light stayed on. Turned out to be the rear O2 sensor.
Good luck man.
#5
allpaw4
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Posted 27 July 2013 - 10:43 PM
Depending on your ECU, it takes 3 faults to log a code. Must happen in a single trip. Otherwise is just brings up the light for as long as the fault is there. Some faults will log codes after its there for a certain period of time, but it depends on the sensor.
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#6
MrSober88
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Posted 28 July 2013 - 06:04 PM
Yeah it just doesn't happen all the time, So cant pin point what I do at the time it comes on. But will go out as soon as the revs drop to idle.
Still have not worked it out lol, but car doesnt run bad when its on..
#7
RX25SE
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Posted 28 July 2013 - 08:27 PM
Extract codes?
If I told you I was a compulsive liar, would you believe me?
#8
MrSober88
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Posted 29 July 2013 - 12:44 PM
None get logged, I have checked and no codes come up when I connect the to plugs.
Maybe I need to go for a longer drive and get it to come up 3 times lol.
#9
mr/miss rex
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Posted 09 August 2013 - 04:34 PM
Sounds like a knock sensor
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