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Pontiac Repair/Pontiac Grand Prix 2006


Hi,I have a 2006 Pontiac Grand Prix. Two months ago my check engine light turned on, I then to it to the mechanic and they told me it was the catalytic converter. They changed it. Then it turned on again and they told me now it was the exhaust pipe.And the ecibor. after they changed a few days later the chek engine light turned on again! I took it them again and they changed the exhaust manifold gasket. Then they changed the sensors. And then again the check engine light turned on again two days later.Can you help me know what it is?

Hi Pedro;

do you know what codes is setting? same as when this all started a p0420? first off if an aftermarket converter was put on this that is more then likely the issue and nothing else. if it had an orignal equipment (new) not used converter and it keeps setting the same code they need to look outside the box as to a cause but 99% of the time a cat. converter codes is cause by just that the converter. if afermarket sensor were put in this same thing they cause issues. No afetrmarket parts for any fuel injection/fuel related parts should ever be used. good luck ;-)

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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