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: 129,172 (65,000–230,000)
8 model years affected: 1994, 2001, 2002, 2004, more2005, 2006, 2007, 2008
30 people reported this problem
Viewing 1 - 12 of 12 comments
straight pipe
loss of power and not as it should be I believe it's the Catalectic converter.
Lost of power going up hills. $700.00 to fix
car just quit and catalytic converter got red hot and smoked filled car
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
had no power exausth manifold get red hot , replaced catiliatic converted ran great