Check Engine Light Help - Maintenance and Repair Forum

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Check Engine Light Help
Saturday, July 23, 2005 8:20 AM
Woke up this morning got in my car and got the CEL on i got 60k miles and very well maintained cant seem to figure out whats wrong with it feels normal except from 1st-2nd im thinking maybe i need a transmission fluid change would this throw a CEL? I'm gonna goto the dealership to see whats throwing the code but i may not have time today to get in before they close anyone got any idea what it could be?

Re: Check Engine Light Help
Saturday, July 23, 2005 9:35 AM
Hmm. A CEL is an emissions issue. I would take it to autozone or advanced to get it scanned for free.. It could just be a bad o2 sensor or a bad cat. Let us know what you find.



Re: Check Engine Light Help
Saturday, July 23, 2005 10:57 AM
Mongoose thanks for the info on autozone, i had no idea they did free CEL checks for you i would of had to wait till thur for an appointment with the dealer and you were also right it was the o2 sensor they said its the one before the cat, where exactly is that located is that the one that goes into the intake or is it under the car by the cat?
Re: Check Engine Light Help
Saturday, July 23, 2005 12:06 PM
you have a 2.4, look by the firewall, look at the exhaust manifold/piping coming out of the engine, there will 3 screws holding a heat shield, take those off and you'll see your O2 sensor.
Re: Check Engine Light Help
Saturday, July 23, 2005 12:56 PM
If your O2 sensor was bad, your car would be running like crap.




“Facts are meaningless. You could use facts to prove anything that’s even remotely true."
Re: Check Engine Light Help
Saturday, July 23, 2005 8:33 PM
Lawnmowerracer wrote:If your O2 sensor was bad, your car would be running like crap.


This is somewhat true.

He would notice a decrease in gas mileage. And it may have a hesitation.

The computer can compensate for the bad O2 sensor and make it run close to normal though.




- 2004 Cavalier - 124k, owned since new



Re: Check Engine Light Help
Saturday, July 23, 2005 8:44 PM
Rob S wrote:
Lawnmowerracer wrote:If your O2 sensor was bad, your car would be running like crap.


This is somewhat true.

He would notice a decrease in gas mileage. And it may have a hesitation.

The computer can compensate for the bad O2 sensor and make it run close to normal though.


Usually, but it sometimes goes into limp mode.

If you throw a CEL, and your car is ok, It could be a faulty reading. That too happens.




“Facts are meaningless. You could use facts to prove anything that’s even remotely true."
Re: Check Engine Light Help
Saturday, July 23, 2005 9:05 PM
i have noticed its kinda sluggish fshifting from 1st-2nd today with the B&M shiftkit off hopefully thats due to the o2 sensor =\
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