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: 124,539 (65,000–215,000)
7 model years affected: 1994, 2001, 2002, 2004, more2005, 2006, 2008
26 people reported this problem
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Viewing 1 - 9 of 9 comments
I HAD MY BOYFRIEND KNOCK OUT THE COMBS IN THE CATALYTIC CONVERTER
loss of power and not as it should be I believe it's the Catalectic converter.
straight pipe
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
Lost of power going up hills. $700.00 to fix
had no power exausth manifold get red hot , replaced catiliatic converted ran great