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You don't mention the make, model (and engine) or year of the vehicle, but I'd start by seeing what codes are being thrown.
Borrow a friends OBD2 reader and check for any trouble codes which will greatly help in zeroing in on what the cause could be.
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May 28th, 2009 09:26 AM #1
Low RPM idle, then engine light turns on.. what could it be?
Hey everyone, just a quick problem I have been trying to figure out.
Once in a while when I am idleing, the rpms shoot down to under 1000 rpm and then the yellow check engine light turns on. Nothing seems to be wrong once I am driving be the light stays on. Sometimes, it does not happen at all.
Also, when I fill up my car with gas, the light comes on and when I drive for a while it turns off. What should be checked here?
Cheers!
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May 28th, 2009 09:38 AM #2 Reply With Quote
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May 28th, 2009 09:47 AM #3
This happened on my Civic awhile back and it was an oxygen sensor in the exhaust manifold.
The problem was not intermittent, though. It idled rough all the time, and the light stayed on. Reply With Quote
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May 28th, 2009 10:22 AM #4
Either the MAF sensor or the connection to the MAF sensor.
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May 28th, 2009 10:26 AM #5
Partially clogged cat converter.
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May 28th, 2009 10:44 AM #6
EGR valve possibly?
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May 28th, 2009 10:51 AM #7Sr. Member
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I'm guessing MAF (Mass Air Flow Sensor)
Pull the code and see wht it is._______________
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May 28th, 2009 11:08 AM #8
As many have suggested, the code reader will tell you which of the above it is. You can buy these fairly cheaply these days at Princess Auto.
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May 28th, 2009 11:10 AM #9Deal Addict
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Originally Posted by phomp
Does it jerk? It sounds like misfiring. Usually that's what happens when there is a misfire. If possible, you can check the spark plugs yourself._______________
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May 28th, 2009 11:27 AM #10
I'm starting to think it is the gas cap... I will check that real quick.
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