Check Engine light

[Biggb]

Check engine light just came on while I’m away on Vacation brought it to dealer they state truck needs all 4 O2 sensors and two Catalytic Converters . Shouldn’t this be covered under MaxCare lifetime warranty? Truck is 2014 Laramie 2500 CC 4x4

 

[jws123]

No way in hell all that is bad at once your being taken for a ride go somewhere else how many miles on it? i have 210k on my 2011 orig cats orig 02 sensors.

 

[Tach_tech]

No way in hell all that is bad at once your being taken for a ride go somewhere else how many miles on it? i have 210k on my 2011 orig cats orig 02 sensors.

The issue is probably just the cat. They’re likely recommending new sensors as it’s a good practice to replace them when a cat goes, especially if they’re the original sensors.

 

[GTyankee]

If it were me, i would consider going to somewhere where they use a Heat Gun to determine what is wrong
computer figures out which O2 sensor goes bad
An infrared sensor tells you the same thing

 

[Biggb]

JWS 123 73,000 miles .i have full lifetime warranty coverage , but dealer said he has to get authorization from Chrysler first .

 

[Burla]

Ask the price for the o2 sensors, I'd say around 100 for the part and an hour labor, any more you can do that yourself. You don't know why the cat failed, having good o2 sensors is just a good idea considering the cat went bad. Price those cats at an exhaust shop if you have to pay for it. If you got to pay, let us know the damage.

This is also something I would want redundant CEL's before I shelled the money out, might just be bad gas.

 

[62Blazer]

I would definitely question the diagnosis and maybe get a second opinion. From my experience just because it's a dealership doesn't mean the garage techs are any good. No offense to anybody who might be a dealership mechanic as there are good ones, but I've had some of the worst experiences on car repairs at a dealer and refuse to go to them unless it's a warranty job.

As stated above if the truck was running fine and the only issue was the light coming on I find it hard to believe that both cats went bad. I can understand replacing all of the O2 sensors if the cats were bad, but again question both cats going bad at the same time and not causing any obvious drivability issues or previous lights........not saying it couldn't happen, but seems a little unusual.

As far as the comment above about the computer just telling you which O2 sensor is bad...to expand on that most O2 related codes don't specifically say the sensor is bad. Rather they say that the reading from the sensor is being flagged as out of the normal range. Many of these codes will state that the reading is lean or rich. It could be the sensor is reading bad, or also simply that the engine is actually running lean and the O2 is telling you something is wrong. The computer also can't tell you the actual sensor is bad or if the wiring and/or connectors have an issue. From my experience less than half of the time you get an O2 sensor related code it is because the sensor itself is bad, rather there is something else going on causing the sensor to read data out of spec. However I can't count how many times that any O2 code pops up and the first thing people do is go pay for a new sensor and put it in, and over half the time the code comes right back.

 

[indept]

Check engine light just came on while I’m away on Vacation brought it to dealer they state truck needs all 4 O2 sensors and two Catalytic Converters . Shouldn’t this be covered under MaxCare lifetime warranty? Truck is 2014 Laramie 2500 CC 4x4

The O2 sensors are covered in the maxcare, the cats are not.

 

[indept]

The issue is probably just the cat. They’re likely recommending new sensors as it’s a good practice to replace them when a cat goes, especially if they’re the original sensors.

Have you seen cats fail at 73000 miles? I would be questioning the diagnosis.

 

[Tach_tech]

Have you seen cats fail at 73000 miles? I would be questioning the diagnosis.

Cat failures aren’t super common but I have seen them even on vehicles with under 50k miles.

A failed cat is a fairly simple thing to diagnose, assuming there’s no other issues. Monitoring the o2 sensors and if downstream mirrors upstream, the cats likely toast. Can also use a temp gun. Usually you’ll get a P0420 or P0430. In my career I don’t think I’ve ever seen a vehicle with a P0420/430 and it not been a failed cat.

 

[indept]

Check engine light just came on while I’m away on Vacation brought it to dealer they state truck needs all 4 O2 sensors and two Catalytic Converters . Shouldn’t this be covered under MaxCare lifetime warranty? Truck is 2014 Laramie 2500 CC 4x4

As far as the cats, that should be covered under the federal emissions warranty, 8 years / 80,000 miles.see link ( it's not just for california, it just mentions they have their own).
https://m.smogtips.com/federal-emissions-warranty-california.cfm

Also found this:
Under federal law, the catalytic converter and engine-control module are covered for eight years or 80,000 miles. Some other emissions parts carry shorter federal warranties, usually two years or 24,000 miles.

Maybe @Tach_tech can chime in on this warranty. He may have seen it used.

 

[indept]

So what happened Biggb? The cats should be free and the O2 sensors may also be covered under the 8yr/80k warranty but worst case if they're not, you will only pay any deductible under your maxcare for them.