Question about 2005 Pontiac Sunfire

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Service lights come on when I step on the gas.

I have a 2002 pontiac sunfire with a 2.2L. Last winter I noticed that the Traction Control, Service Engine, and ABS lights come on when I take off. The lights remain off if I start the car and let it idle. It has no noticable missed in the engine. What could be the problem? The exact same is happening to me! No idea why:(

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These lights are indicating that a fault(s) exists in the systems that u have indicator lights for, they are warning lights, there are 100's of reasons (an eng miss is just one) for the check engine light to be on, and dozens for the traction control and ABS lights. U need to have the dealer or other shop test the systems for the system trouble codes that are stored in the memory of the control modules whenever these light come on, until the system is tested for these codes it would all be guess work and possible wasted money on parts that are not defective, have the test run and post the codes back on fixya

Posted on May 14, 2009


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reset your ecm by turning your ket to on position and turnning on a/c then disconnect positive battery terminal wait 30 sec then turn key off and replace battery cable , Good luck
If this don't work you may have some wires grounding out.

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ABS and TRAC lights are on

This could be and indicator that an abs sensor has gone bad or intermittently losing its signal. This may require replacement of a bearing hub asembly in which the abs sensor is incorporated into.The traction control uses the abs to control slipping when traction is limited. If the abs becomes disabled the traction control does as well.

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I have the exact same problem and it only happened when reversing. Sometimes the car shakes like its going to stall while im reversing. Took it to the repair shop paid 600 dollars and its not fixed!!!
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Abs light, trac light, service engine soon light 2001 Pontiac Grand Am

Sounds like you have a bad wheel speed sensor. You need to have it scanned. Since it's been sitting, it might just be a bad connection to one of the speed sensors.

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2002 Pontiac Sunfire

Bonnie, this is the traction control light, there is many reasons why this could be on. The easiest way to turn it off is to pull the emergency brake, this would usually disengage the traction control. This is not, however, a fix to your problem as to why it is on.

Jan 14, 2009 | 2002 Pontiac Sunfire

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