Bad catalytic converters, 80,000 warrranty will cover.

[lordshin808]

So my CEL have been going on and off the last week, and sometimes it sounds like marbles rattling around when I'm idling at the stop light. I read that it might be bad catalytic converters, so I took the car to the dealership for diagnosis.

They have confirmed both catalytic converters are bad and will cover all repair expenses. I am so relieved. Luckily I brought it in now cause I'm at 79,200 miles. If it failed after 80,000 miles, I would have been SOL.

Mine's a 2007 4.8i. Just putting this information out there, just in case others are in my shoes.

[ard]

Sweet.

There is a reason cats fail at such low miles... do you tend to get black specs around the exhausts?

A

[lordshin808]

Originally Posted by ard

Sweet.

There is a reason cats fail at such low miles... do you tend to get black specs around the exhausts?

A

now that you mentioned it, I do see black specs around the exhausts. What does that mean?

[ard]

A rich running car can run rich for years, and place a load of unburned hydrocarbons on the CAT. Over time this can cause failure.

While all modern cars have a DME/OBD that monitors certain parameters, there are odd situations where these dont work properly. Like a bad thermostat where the engine always runs cool and hte car never hits closed loop control- or if it does, it does to only after an hour...

99+ percent of car owners look no further than "no CEL and seat of the pants feels good", so these things can exist for years.

[PMen]

Just got my 2012 diesel back from dealer. CEL indicated a bad cat. Service advisor said it was the third one he'd seen. Turns out there may have been a bad lot from supplier. Pleased the warranty was there. Expensive parts.

[ard]

Originally Posted by PMen

Just got my 2012 diesel back from dealer. CEL indicated a bad cat. Service advisor said it was the third one he'd seen. Turns out there may have been a bad lot from supplier. Pleased the warranty was there. Expensive parts.

Huh.

Huge recalls in 2010/11 cars over this. NOX sensors, etc...reporgramming....

My 10 had the same CEL code, replaced the SCR cat, same issue returned..then they replaced sensors...then they replaced software. Then I lemoned it.

I dearly HOPE it is a bad lot. That would be a best case scenario, IMO

A

[lordshin808]

Originally Posted by PMen

Just got my 2012 diesel back from dealer. CEL indicated a bad cat. Service advisor said it was the third one he'd seen. Turns out there may have been a bad lot from supplier. Pleased the warranty was there. Expensive parts.

I got mine back after few days ago. Parts alone shows approx. $2700. I don't know how much labor would have cost, but I'm just glad everything was covered by the 8/80,000 warranty.