Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

Catalytic Converter Plugs Up, Loss Of Power

2002 Pontiac Grand Prix

This problem may be covered under warranty. Ask your Pontiac dealer.

9.0

really awful
Typical Repair Cost:
$875.00
Average Mileage:
97,368 miles
Total Complaints:
6 complaints

Most Common Solutions:

  1. not sure (4 reports)
  2. replace catalytic converter (2 reports)
2002 Pontiac Grand Prix exhaust system problems

exhaust system problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2002 Pontiac Grand Prix:

Unsubscribe any time. We don't sell/share your email.

2002 Pontiac Grand Prix Owner Comments

problem #6

Jun 012011

Grand Prix GT 3.8L

  • Automatic transmission
  • 138,557 miles

A D V E R T I S E M E N T S

AFTER I GOT THE EXPENSIVE INTAKE PROBLEM TAKEN CARE OF $1500.00 DOLLARS LATER NOW THE CONVERTER IS SHOT. WHAT AN AWFUL DESIGN IF I WOULD OF KNOW ABOUT THIS DESIGN I WOULD OF BOUGHT A FORD! WHY IS THERE NOT A RECALL ON THE INTAKE PROBLEM THATS THE STEM OF ALL THE ON GOING PROBLEMS RIGHT NOW.

- , New Prauge, MN, USA

problem #5

Feb 102010

Grand Prix GT 3.8L V6

  • Automatic transmission
  • 121,000 miles

The check engine light came on a couple of days ago and was told it was the converter. I'm having a more major problem fixed - intake gaskets, so not sure what this will cost later.

- , Columbia, MO, USA

problem #4

Aug 152009

Grand Prix GT 3.8L V6

  • Automatic transmission
  • 90,000 miles

after having the catalytic converter replaced at my local firestone store, 7mos later ive got a service engine soon light on again....take it back they tell me its because i now have a leaking head gasket!! BUT after doing a pressure test for twenty min. with engine running (cool) not even close to running hot not one bit of leak off of pressure. no loss of coolant, engine runs fine. the code for the lite is for the cat converter. firestone replaced the converter but says since haedgasket is leaking they will not warranty it again!! also no oil in coolant or coolant in my oil!! WHAT THE F....any advise???

- , Belleville, IL, USA

problem #3

Feb 152007

Grand Prix 3.2L

  • Automatic transmission
  • 70,000 miles

A D V E R T I S E M E N T S

We noticed our car started losing power. We pushed on the gas, and it would take forever for it to get up to speed. We also started getting very poor gas mileage (13 mpg). We took it in to the dealership and were lucky enough to have this under warranty. If I remember correctly, the warranty is for up to 80,000 miles. It is a VERY expensive fix otherwise.

- , Seattle, WA, USA

problem #2

Oct 152008

Grand Prix GT V6

  • Automatic transmission
  • 105,000 miles

My 2002 Pontiac Grand Prix GT gradually started losing power, then BOOM I had no power as of October 2008. When accelerating the car jerks and shifts but doesn't stall (knock on wood). At one point it almost overheated and the service engine soon light came on as well. All the while, my low coolant light has been on for months and it's not the sensor its something else. After reading on this and seeing another person has this problem, I've concluded it could be the catalytic converter.

This will be the last GM product I purchase if this problem is not resolved by year's end. I had a Tahoe and had a similar problem but turns out it was the fuel pump. When these vehicles lose power, that's the end. :-(

- , Boston, MA, USA

problem #1

May 022007

(reported on)

Grand Prix GT 3.8L V6

  • Automatic transmission
  • 59,652 miles

car had no power. The computer comes up ok plug converter comes up ok put it was a piece falls down when you step on the gas it flips up and plugs.

- , Hamilton, Ontario, Canada

Not what you are looking for?