Grand Prix

Loss of Engine Power Due to Plugged Catalytic Converter on Pontiac Grand Prix

Problem Description and Possible Solution

The catalytic converter may become plugged resulting in loss of engine power. General Motors has extended the catalytic convertor warranty on some models to 10 years or 120,000 miles. Please contact your local GM dealer to see if your vehicle is included.

Problem Data
RepairPal Verified
Average mileage: 134,066 (65,000–230,000)
8 model years affected: 1994, 2001, 2002, 2004, more2005, 2006, 2007, 2008
39 people reported this problem
Viewing 1 - 15 of 15 comments
straight pipe
loss of power and not as it should be I believe it's the Catalectic converter.
can't figure out the real problem . i changed coils,sparkplugs,air filter,and comb out converter car still will not stay running i need and answer
car just quit and catalytic converter got red hot and smoked filled car
Check engine lite on had vehicle scanned and code came back faulty converter
Lost of power going up hills. $700.00 to fix
car not enough engine power,running rough,cutting out. giving more throttle makes it worse along with bad muffler. has been diagnosed with bad converter and fuel burning
had no power exausth manifold get red hot , replaced catiliatic converted ran great
My car won't pick up no speed. It shifts out on time and correct but it won't speed up.
The Catalytic converter may be faulty. I have lack of engine power and makes a whistling noise upon hard acceleration. The engine light is on due to the catalytic converter.
Loss of power causing the transmission to not shift out of first gear. Car is in the shop right now and I am currently being told it is a plugged Catalytic converter. Shop is trying to charge me $800 to fix it.
Had to have the entire exhaust system replaced it has a plugged catalytic convertor.
Put on an aftermarket catalytic, had to replace a few months later with a GM converter $800