Is the catalytic converter covered by a 8-year/80000 mile emissions warranty?

 

Nope. Doesn't come under warranty as I have 137000 miles to it.

 

Never tried it, but much cheaper than $1000!

 

Check engine light has gone off all of a sudden. Don't know when it would come back.

 

at 137000 miles I'm inclined to believe a failed converter is no fluke. I'd be concerned with what caused it.

I'd also want a second opinion, or if you can get a waveform of the oxygen sensors.

 

Cats typically dont die on their own.. something killed the cat.

Front ox sensor is used for fuel trim as exhaust leaves exhaust port.. exhaust flow through catalyst honeycomb and past the post cat ox (efficiency monitor)..

If the front and rear ox sensor waveform mirror each other, be the same as no honeycomb, thus cat is dead.. PCM via ox inputs determined cat is weak/dead.

137,000 mile,,, have the plugs been changed at all ? Iridium common replacement is 100,000.. we have them on our schedule for replacement at 90,000 service interval... misfire is common way to kill a cat.

You can drive pretty much all you want, but the PCM will know the cat is dead, and if you have SMOG for vehicle registration, you going to fail, as READINESS TEST will not complete when system looks to see if that sytem is operating proper.. plus inspector will see the presence of codes in the "number of DTC" line.. code will always be there until it is manually erased, and come back after logic says bum cat.

Non fatal codes will illuminate MIL, then MIL go out after so many key cycle, but code still stored until erased manually.

 

I was told that both the O2 sensors were reading the same values. Also Tech told that there are no leaks and everything else like plugs all seem to be fine. The reason the they state that the Cat is out is because of the age. But now the check engine light is off, It turned off automatically. Fingers crossed to see when it comes back.

 

I was told that both the O2 sensors were reading the same values.
Honey comb is dead, same as removing the brick, sensors have identical pre & post cat values,, needs cat

The reason the they state that the Cat is out is because of the age.
Could be, any misfire issues in past history ? Misfire left unattended will kill a cat, and lead to melt down which clog exhaust tract and engine cant breath

But now the check engine light is off, It turned off automatically. Fingers crossed to see when it comes back.
Scan it, code still there if nobody went in and erased the code from memory... light go off after "X" key cycles because it not a catastropihic code, probably come back on after logic determine cat is bum again.

It didn't magically repair itself

 

When a cat conv gets clogged, you will notice a change in performance. A loss of power going uphill is one good clue.

 

Hi,

I was told I have the same code. What did you land up doing if anything to get your car fixed?

 

I am still driving without changing the CAT. The CEL never came back on and waiting for the day to pop up in the dash. But I was inquiring few places for an estimate to replace the CAT. Everywhere I was getting the estimate of 1000$ + and also in few shops they were not sure if the CEL will go off if they change the CAT as they were not sure from the original Issue was coming from. They were not able to isolate the Issue which caused the Bad Cat. Next time I will need to take my car to a Hyundai Dealer if it comes up.

 

So this is final update for my car.Took it to the Hyundai service center and had the check engine light diagnosed for P0420 as it came back again.Also I was having a rough idling.

They have changed the following according to the Invoice.

1. Gasket - Exhaust Pipe.
2. Spark Plugs.
3. Oil Seal.
4. Gasket - Rocker Cover.
5. V-Ribbed Belt.
6. Gasket Engine Oil Plug.
7. Cap-sealing.
8. Engine Oil.
9. Filter Assy - Engine oil.
10. Sealant - Silicone.
11. Replaced Front Crank Seal.

The Serpentine belt was replaced as I was having a squeal during morning starts.

I am due to change my CAT on Monday as they got the wrong part shipped.

I was told that the first CAT was the one which failed and there was also a oil leak which is now fixed. Drive is feeling a lot smoother now and hopefully completely good once I change the CAT too.

I decided to go with Hyundai because every local shop I was asking were Ok to change the CAT but they did not guarantee me if my CEL would go off. So I wanted a safe bet.

 

WOW! That must have added up to a lot of money. I guess you plan to keep the car for a while. Good Luck! I also have a 2007 with 74000 miles. I am looking at the 2014s or maybe the 2015s just to avoid those big buck repairs.

WCW

 

Curious as to how this panned out for you? have the same code here....emissions due end of June. By what you listed above, they basically changed the oil and plugs, the belt and rocker cover gasket.....none of those would cause the code.

 

Hey I've got the same problem on my 2014 Tucson it only has 44,572 miles on it can a cat go bad in 44,572 miles? I cleared the code but it came back in 3 or 4 days. I'm at the dealer with it now!

 

P0420 Code CEL on


Had the car at the dealer they said there was a software upgrade due so they installed the upgrade, the CEL cleared but the code came back the very next day!

 

Dipsticks obviously cant follow directions....


Description:

This bulletin provides information related to the Engine Control Module (ECM) software update to prevent an increase in the catalyst temperature which may result in illumination of the malfunction indicator light with the following DTC(s):

 P0171 - System too Lean - Bank 1.

 P0420 - Catalytic Converter System, Bank 1 - Efficiency Below Threshold.

In rare cases, there can be a reduction in engine power if the catalyst is restricted.

IMPORTANT :

 If DTC P0420 is present, replace the exhaust manifold catalyst in addition to performing the ECM update. Print GDS DTC screen with VIN information and attach to the RO.

 DO NOT replace catalyst for DTC P0171 only. The claim may be subject to chargeback.

 

I have the p0420 code I had all 02 sensors changed and 1 converter changed!!! Should I get manifold exhaust converter changed to clear code p0420

 

OK, so I hope this provides some insight for you guys.

I was getting P0171 - System too lean bank one, for quite awhile it kept throwing me in limp mode, I chalked it up the the NSPP and unplugged it. The error codes went away. This was about a year and a half ago.

I then noticed there was slight surging at idle when sitting at a red light in the summer, shrugged it off as the compressor working too hard and changed plugs just to be safe.

I got the P0420 code twice about 9 months ago, it went away on its own both time so I shrugged it off and paid no attention.

So about a week ago I took the car our with a driving club here and did some spirited driving in the back roads of az, when I got back home i noticed a horrid rattling sound coming from rear center of the motor, sounded like someone tossed some screws in a blender.

Took it to a few different shops to ensure it wasn't the flex plate or torque converter and the second shop pointed to the rear cat.

Put it on the rack and turned it on and sure enough my rear cat sounds like a blender. It has completely failed o2 sensors have mirrored readings on up and down stream.

Ordered the Walker rear cat and 4 new sensors today from rock Auto and will update once it's installed. I might do a quick guide on how to replace it, the only difficult part seems to be getting access to the rear exhaust manifold screws.


2006 V6 172,000 miles at Cat failure.

 

I'm getting this on my Accent with 160k on it. It comes and goes. I decided to replace the rear O2.

Heated it up with some MAP gas and it broke loose easy enough but it took out the treads too. AutoZone has a O2 m18 x 1.50 thread chaser for $15.....

Great Neck/Oxygen sensor thread chaser

Part Number: 25255