Check Engine Light / Oxygen Sensor / Manifold

[RyanD]

I have a 2009 Genesis 4.3 Titanium with Tech Package. I just hit 1,000 miles. Took it in and Hyundai is stating there was a machining problem when the oxygen sensor was cross threaded into the exhaust manifold and both needed replacement. They might as well have been speaking Portugese... They said I was the first one (on 2.27.2009) to have this problem. Anyone know if there will be any long term effects or things to watch out for after this service is complete? Think they are blowing exhaust up my tailpipe?

ughh.

Ryan

 

[Mark_888]

I have a 2009 Genesis 4.3 Titanium with Tech Package. I just hit 1,000 miles. Took it in and Hyundai is stating there was a machining problem when the oxygen sensor was cross threaded into the exhaust manifold and both needed replacement. They might as well have been speaking Portugese... They said I was the first one (on 2.27.2009) to have this problem. Anyone know if there will be any long term effects or things to watch out for after this service is complete? Think they are blowing exhaust up my tailpipe?

ughh.

Ryan

I assume you have the 4.6 V8. I don't recall anyone else posting about the same problem. It means that when the O2 sensor was screwed into the exhaust manifold at the factory, it was cross-threaded (not screwed in straight) and the threads are damaged on both the sensor (male threads) and the manifold (female threads).

Assuming they put the new exhaust manifold on correctly (not rocket science) you should not have any residual problems.

 

[RyanD]

Thanks for the reply. And roger that on the V8. Good to hear this not something that will be a nagging problem.
Ryan

 

[moose66]

I have a 2009 Genesis 4.3 Titanium with Tech Package. I just hit 1,000 miles. Took it in and Hyundai is stating there was a machining problem when the oxygen sensor was cross threaded into the exhaust manifold and both needed replacement. They might as well have been speaking Portugese... They said I was the first one (on 2.27.2009) to have this problem. Anyone know if there will be any long term effects or things to watch out for after this service is complete? Think they are blowing exhaust up my tailpipe?

ughh.

Ryan

How did they determine there was an issue? Did you get a warning light on your dash? Or, did you experience some sort of problem while driving your vehicle? Interesting.

 

[moose66]

I guess the title of the thread does say "Check Engine Light . . ." That answers my question.

 

[Nabber]

I didn't realize the 4.6 had an O2 sensor in the exhaust manifold. Unless I'm mistaken, this allows for a direct reading of A/F ratios (averaged for the manifold if there is only one) and allows for adjustment for rich/lean conditions on the fly. Does anyone know if there is one per side or one per cylinder or maybe just one?

I'm gonna have to read more about the 4.6L I own!

 

[RyanD]

Nabber, I'll try and remember to ask tomorrow.

Moose66, yep that check engine light came on. I was hoping I had left the as cap unscrewed or something simple. Other than the light coming on I didn't seen any difference when I was driving.

 

[jpq1999]

My check engine light has been on for two weeks. I am finally able to bring it to the dealer on Monday. I'll post back the results

4.6 w/ tech

 

[wdiaz]

My check engine light has been on for two weeks. I am finally able to bring it to the dealer on Monday. I'll post back the results

4.6 w/ tech

What exacthly the Serv. Dept tell you about the check engine light?

 

[Turanacus]

the check engine light came on in my 4.6, 2000 miles, it was on for about 2 days and then it went away.

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[emdoller]

I have a 4.6 and my light just came on while driving to work. I will read out the code later today and let you know what it says. Bummer...

 

[emdoller]

Well I tried to read the code using my OBDII reader and it comes up with an error. I've never had an issue with any other car... is the genesis different standard?

 

[vega]

Well I tried to read the code using my OBDII reader and it comes up with an error. I've never had an issue with any other car... is the genesis different standard?

you need a OBDII scanner that is CAN compliant.

 

[shutterpro]

20,000 miles 4.6 v8. 09 model. Check engine light came on and I took straight to the dealer. It was the oxygen sensor.

 

[SterlingDave]

I was driving on vacation at the end of a long day with about 1/8 tank of gas left and the check engine light came on. I was in some little town north of OK City. I checked online the next morning for the nearest dealer (about 15 miles away) and called them. I described the problem and asked if I should bring it in or just drive on to Denver and have it checked there.

They recommended that I bring it in and have it checked immediately. I said OK and expected that they would find that the filler cap was not tight or something like that. Actually they found some "residue" around the neck where the cap fits and cleaned it off. Then they "reset" the check engine error. And pronounced it all OK. And no charge....under warranty.

The interesting part is that I asked if the check engine light should clear after retightening the filler cap. He said "not necessarily immediately". I said, "What?". He told me that the check engine procedure does its checking routine randomly. (Hey, that's what he said.) He further explained that if the routine found "all ok" it would reset the error and all would be ok.

Anywho....that's my story and I'm sticking to it. Some of you might want to verify the accuracy of his explanation.