Is a catalytic converter a common repair in the G6?

Tiny
IOWAG6
  • MEMBER
  • 2008 PONTIAC G6
  • 75,000 MILES
Manifold heat shield bolt broke off, manifold flange bolt broke off, converter brace bolt broke off, two manifold studs broke off, all was repaired under warranty, but will we continue to have problems, are we driving the car too hard, is this just a defect, or does this happen a lot? Does certain type of fuel burn too hot? E-85 for example?
Do you
have the same problem?
Yes
No
Friday, December 30th, 2011 AT 2:50 AM

7 Replies

Tiny
CARADIODOC
  • EXPERT
My guess is one part failed, then other rusty bolts were broken by the mechanic while trying to get them apart. That is very common and typical on any car, but in my experience from working at a very nice Chrysler dealership, bolts still can be removed easily on a four-year-old car. Chrysler covers things under warranty if they break in the process of performing other warranty repairs. GM is very customer-unfriendly, but I suspect they have the same policy. That is why you weren't asked to pay for any additional parts.

As far as quality of the product, GM vehicles aren't any better or worse than other brands, at least in most respects. Doesn't sound like you had anything out of the ordinary occur and there's no reason to worry. You can expect a lot of generator failures and expensive trips to the dealer to have computers repaired, but that too can happen with other cars.
Was this
answer
helpful?
Yes
No
Friday, December 30th, 2011 AT 3:03 AM
Tiny
BFULCH35
  • MEMBER
  • 2007 PONTIAC G6
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 62,000 MILES
What is a fair estimate for the replacement of a catalytic converter and 4 fuel injectors on my 2007 Pontiac G6. My mechanic wants to charge $1,172. That sounds pretty high to me. He claims the converter costs $460 and each fuel injector cost $87. I have found prices on the internet for far cheaper.
Also if my fuel injectors cause the catalytic converter to fail, would that void the warranty on the catalytic converter?

Thank you for your help
Was this
answer
helpful?
Yes
No
Sunday, September 27th, 2020 AT 6:19 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
GM does have a a lot of trouble with injectors, not only that they fail electrically, but that they are not flow-matched at the factory. If one flows more or less than the rest, an incorrect amount of unburned oxygen will show up in the exhaust. Based on the oxygen sensor's readings, more fuel will be commanded by the Engine Computer, but it increases flow equally among all of the cylinders, even those that don't need more. The best way to avoid this is to buy remanufactured injectors because you will get a matched set.

87 bucks is fairly reasonable for a GM injector. When your mechanic buys them and installs them, you will get a warranty for parts and labor to replace them. If you buy them, which is like bringing your own food to a restaurant, and one fails, you will be charged again for the diagnostic time and the time to replace it. You will also have to find and order the replacement again.

$700.00 - 800.00 repair bills every six months are pretty common on newer cars, but it does seem kind of early to have a catalytic converter failure. If the catalyst melted from too much raw fuel and the resulting overheating, the Check Engine light should have been flashing. Is there any chance the converter is still under the emissions system warranty?

Caradiodoc
Was this
answer
helpful?
Yes
No
Sunday, September 27th, 2020 AT 6:19 PM (Merged)
Tiny
LORA.CRAMER
  • MEMBER
  • 2007 PONTIAC G6
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 66,666 MILES
I was told after my SES light came on that I needed a new Bank 1 sensor; purchased and replaced the sensor. A few hours later, SES light came back on. My car is still sluggish and slow to accelerate. Took it back to get the code read - and said I needed a new catalyitic converter. I have 66K miles on the car.I found out it's covered by the dealership to get replaced (under 80K and/or 8 yrs old).

Is this a common problem? Does my cc really need replaced?
Was this
answer
helpful?
Yes
No
Sunday, September 27th, 2020 AT 6:19 PM (Merged)
Tiny
HMAC300
  • EXPERT
No it's not common but it does happen with the converter. It's mechanical so it can break. If the dealer will replace it then let them have at it as it won't cure itself.
Was this
answer
helpful?
Yes
No
Sunday, September 27th, 2020 AT 6:19 PM (Merged)
Tiny
LAURENB
  • MEMBER
  • 2006 PONTIAC G6
  • 116,000 MILES
I had a new engine put in and now I need a catalytic converter.I think they said rear converter if that means anything. I dont have the funds to spend at another repair shop, what are my options? The car is driving fine but I need an inspection asap
Was this
answer
helpful?
Yes
No
Sunday, September 27th, 2020 AT 6:20 PM (Merged)
Tiny
WRENCHER1
  • MEMBER
Your options are replace the converter or fail the inspection. You might want to check an exhaust specialty shop as they often have an aftermarket equivalent for a lot less money than OEM.
Was this
answer
helpful?
Yes
No
Sunday, September 27th, 2020 AT 6:20 PM (Merged)

Please login or register to post a reply.

Sponsored links