Loss of Engine Power Due to Plugged Catalytic Converter on Buick Century

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.

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Average mileage: 123,230 (78,000–225,000)
5 model years affected: 1999, 2000, 2001, 2002, more2003
18 people reported this problem
7 people shared problem details
2001 Buick Century145,000
My car was losing power and couldn't hardly get up to speed, took it into my mechanic, and $275 later the car is good as new again! It actually got to the point that if I was going up a hill the car would start screeching as the exhaust would start pushing its was through things it wasn't supposed to.
2 people like thisFlag inappropiate
2001 Buick Century85,000
Catalytic Converter plugged,had to replace to pass emissions. Also intake manifold leaking along with head gaskets. Total cost-$1200.00
2 people like thisFlag inappropiate
2003 Buick Century78,000
I PAID $1800 TO GOOD YEAR REPAIR FOR A LIST OF THINGS A COMPUTOR SUGGESTED AFTER ONE WEEK AND A RENTAL CAR THEY DIAGNOSED THE CATALYTIC CONV. THEN THE LIGHT CAME ON AGAIN,AND THEY SAID IT WAS THE SENSORS I PAID another 300. after 2months aht light came on again.now what?
2 people like thisFlag inappropiate
2001 Buick Century88,000
Loss of engine power that gradually was getting worse. Problem climbing hill's was worse than on level. Had the catalytic converter relace. Engine power is back to normal. I was not aware the the warranty was extended by GM to 10years or 120,000 miles.
1 person likes thisFlag inappropiate
2001 Buick Century109,000
Plugged catalytic converter
1 person likes thisFlag inappropiate
2001 Buick Century225,000
Erratic power loss. Took vehicle to parts store where OBD codes were read indicating a catalytic converter failure. Found a new CC on Amazon.com for abt. $90.00, found a muffler shop that would remove the old CC and weld in the new one for $40.00. Total cost, $120-ish.
No power going up hill. Might b the catalytic converter, might b plugged. changed the tail pipe. still not driving right
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