Question about Pontiac Sunfire

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Computer diagnostic connection

My daughter has a 2003 Sunfire. On her way home from work last night the TC light came on and she was unable to go faster than 20mph. What might cause this?

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A defective throttle body.

Posted on Mar 21, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2003 sunfire wiring

I have a 2003 subnfire and my battery drain every night.
found out that my radio the monsoon 8 speaker system with the amp was the cause it even cause Dash lights to work and not to work. pulled stereo and amp no problem now. solved problem

Posted on Feb 11, 2009

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SOURCE: fuel gauge and speedo not working

usually its the negitive terminal you disconnect for about 30 secs. tyr that. if that doesnt do it, its possible you shorted something out.

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SOURCE: 2000 Sunfire TC & Engine Light won't go off!

You have an engine code. When engine code sets it disable the traction control & tc light comes on. Go to auto zone they will check for codes for free. Your can buy your part & install your self if simple. If you need special tool they have loaners

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SOURCE: When I get in start my 2002 Jaguar X type there

Possible but not probable, Restricted converters will usually set a cat cod and check engine light will come on. I dont see a gearbox light on fault light on instrument panel

Posted on Mar 13, 2010

Testimonial: "The check engine light was coming on,thats why the diagnostic check.That's how I found the cat convert prob. Then the G B F lite started coming on. "

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I had that problem, and I thought it was the ground as well, but it turns out the splice in the wire harness sits at the absolute lowest level the bundle could, and it collects water. I opened mine up, and it was completely corroded. It appears there was a recall on this, but if you got yours used, as I did, you wouldn't have been notified.
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