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Old 02-06-2009, 02:55 PM
ps2cho's Avatar
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Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,525
Check Engine light when car is off?

Is this normal? I got into the car this morning and the check engine light was on....This is without the key in the ignition. I drove it to work and the light went off as I started the car.

...Just got home and this time the light was on all the time I was driving. The diagnostic light bleeps 5 times which I hear means the O2 sensor...(I replaced it less than 10k miles ago??)

Should the light be on all the time even when the key is off?
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