Need Major Help [Archive] - Forum


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10-16-2004, 08:59 AM

The car is a 2003 GAGT with 76555 miles on it, yesterday i noticed that the idle on it was rough, bouncing from about 600-1500 RPM's at times so i took it to Autozone because the sevice engine soon light was on too. The codes being Thrown are "T0131" (twice) and "P0300", the guy at autozone said that this meant O2 sensors at low voltage-(T0131) and the other meant, mutiple cylinders misfiring-(P0300), why would i have these problems, i baby the car and it is very well taken care of, any ideas please help

10-16-2004, 09:02 AM
you're having the problems with your car because of a bad misfires...

could be anything, have to rip it apart and look to see whats going on

10-16-2004, 09:34 AM
wow....03 with 70500 i guess warranty is out of the queston

10-16-2004, 10:36 AM
yeah warranty is long time out of the question

10-16-2004, 10:52 AM
Have you changed your spark plugs or ignition wires? You may need an upstream O2 sensor.

10-16-2004, 01:38 PM
wow did you drive this car night and day bro?

10-16-2004, 04:40 PM
I had the same problem with the random misfire but only on the three cylinders that face the front of the car. My SES light would come on every two days. Now I don't get the random misfire, I'm getting bank one rich. Any suggestions?

10-18-2004, 08:05 AM
Do your plugs and wires first, and check for vaccume leaks.

10-18-2004, 03:46 PM
sad to say I work at autozone and i came across the same codes on various GM model cars. I would first check to see if the coil pack has no rust or any other corrosion on them (this happens when the engine gets washed alot) the coil pack is where the spark plug wires connect to, nearest to the firewall. then i would replace the spark plugs, i wouldnt worry about the 02 sensors because the senor would pick up the abnormality of fuel being burned from the misfires, it happens all the time. I strongly believe your spark plugs are your culprits (I think I spelled it right) goodluck and let us know if you find out what it is