Turbo Fail

[Sime]

i don’t have an issue with mine, but if the turbo’s were to either fail or not be working optimally, besides performance issues, would the cars fail systems inform us there’s an issue?

 

[brancky3]

i don’t have an issue with mine, but if the turbo’s were to either fail or not be working optimally, besides performance issues, would the cars fail systems inform us there’s an issue?

Most likely you'll notice a very loud "dentist drill" sound or your car will smoke a lot.

 

[Sime]

Ok, put it this way, I’m kinda digging around at how well these modern cars know what they are doing, so if the turbo’s were say, stop completely, but of course air is still flowing in their pathway, are these cars smart enough to know something ain’t kosher if the actual turbo doesn’t itself have a failure indicator. Would the engine be smart enough to know the air management system is performing optimally?

 

[Ty Davis]

Ok, put it this way, I’m kinda digging around at how well these modern cars know what they are doing, so if the turbo’s were say, stop completely, but of course air is still flowing in their pathway, are these cars smart enough to know something ain’t kosher if the actual turbo doesn’t itself have a failure indicator. Would the engine be smart enough to know the air management system is performing optimally?

Yes. The ECU knows how much boost is supposed to be produced at any given moment.
If the turbos fail to make boost, you will get a check engine light with the associated code(s).

 

[Sime]

Cheer mate @Ty Davis

 

[Ty Davis]

Cheer mate @Ty Davis

Anytime!

 

[oddball]

We've seen folks post that when a charge hose popped off there were no codes or indications. We've also seen several posts about overboost codes.
So the ECU definitely notices if there's too much boost. Seems it's quite lenient on too little boost.

But, as stated, most turbo failures are quite obvious. Subtle failures aren't really turbo problems- like wastegate/BOV stuck open, hose disconnected, etc.

 

[robz32]

Yes. The ECU knows how much boost is supposed to be produced at any given moment.
If the turbos fail to make boost, you will get a check engine light with the associated code(s).

Negative.

After replacing my intercooler with the JT, on my way home, one of the couplers came undone on the charge side (hose clamp needed to be tightened more). The car kept running normally, aside from the obvious loss of power, there were no lights on the dash or CEL codes.

 

[Tonkabob]

Even over boost has no codes. You just lose all boost until the next restart.

 

[BlueBrick]

I don't know on the Stinger, but I can tell you when my Optima waste gate failed open I didn't get a CEL driving it over the course of a day, but it was obvious it wasn't making boost the first time I tried to get to highway speeds as the power was way down.

 

[bunkerman1]

Yes. The ECU knows how much boost is supposed to be produced at any given moment.
If the turbos fail to make boost, you will get a check engine light with the associated code(s).

I am getting zero boost and no check engine light.

 

[SRV]

I am getting zero boost and no check engine light.

You more than likely threw a code which requires an OBD reader to see it.

 

[Chad]

I have a 23 stinger GT awd with 4K on it and I have the same issue. Turbo is working fine and then I lose boost. The only way to fix it is to turn the engine off and restart it. This has happened twice and there was no check engine light. Any ideas?

 

[bfglitch]

2022+ are known to wind up going into overboost condition, especially in cold weather. When it happens it doesn't trigger a check engine light. The only way to know is to hook up a proper code reader to the OBDII port. When it happens to me it comes up as a "Pending code". My guess is if it happens during multiple drive cycles it eventually trips a code. Problem is it doesn't seem to happen often enough to trip a code. It's happened to me about 2 or 3 times so far since winter set in. For me, it usually seems to happen when the car is producing full boost and changing from either 2nd to 3rd, or 3rd to 4th.

I'd say if we bugged Kia to do something about it, they just might actually take it seriously. But then again, it's Kia and they seem to have an excuse for everything.

 

[5tinger]

Yes it would illuminate the check engine light & throw code P0299 indicating underboost condition.

 

[Chad]

Yes it would illuminate the check engine light & throw code P0299 indicating underboost condition.

It has happened 2 times now with no lights whatsoever. That’s why my dealer say they can’t diagnose it without a code. It’s very frustrating.

 

[bfglitch]

Yes it would illuminate the check engine light & throw code P0299 indicating underboost condition.

Actually the code is P0234 overboost, not P0299 underboost. At least that's what I get as a pending code when I plug in my reader.

It has happened 2 times now with no lights whatsoever. That’s why my dealer say they can’t diagnose it without a code. It’s very frustrating.

Basically you'll practically need to go straight to the dealer after it happens. I'm not sure how long the code is stored as "Pending" after you've turned the engine off and back on. The question is, is Kia just assuming they can't read a code because the check engine light isn't on? Like I mentioned, I was able to read a "Pending code" when I plugged my OBDII reader in and checked it. Granted after it happened, I turned the car off, back on and got home, then read the codes. I didn't go on any other drives after. I would imagine if you've driven two or three times after it happened that it would clear the pending code on its own.

I'm assuming it doesn't turn on the check engine light and instead puts it as a pending code because the system is waiting to see if it's something that happens during multiple drive cycles in a row. Meaning if it were to overboost every single time you drove the car I would believe it would then cause it to trip the check engine light.

 

[Chad]

Actually the code is P0234 overboost, not P0299 underboost. At least that's what I get as a pending code when I plug in my reader.


Basically you'll practically need to go straight to the dealer after it happens. I'm not sure how long the code is stored as "Pending" after you've turned the engine off and back on. The question is, is Kia just assuming they can't read a code because the check engine light isn't on? Like I mentioned, I was able to read a "Pending code" when I plugged my OBDII reader in and checked it. Granted after it happened, I turned the car off, back on and got home, then read the codes. I didn't go on any other drives after. I would imagine if you've driven two or three times after it happened that it would clear the pending code on its own.

I'm assuming it doesn't turn on the check engine light and instead puts it as a pending code because the system is waiting to see if it's something that happens during multiple drive cycles in a row. Meaning if it were to overboost every single time you drove the car I would believe it would then cause it to trip the check engine light.

That makes sense! I just bought a reader so I’m going to plug it in and see what I get once it happens again. Do you know what causes this and is there a fix for it? I know that people are saying something about the cold. I had a 2018 Stinger prior to this one and never had that happen. I hope this doesn’t keep happening as it’s pretty cold here for a few months Thanks for the info

 

[bfglitch]

That makes sense! I just bought a reader so I’m going to plug it in and see what I get once it happens again. Do you know what causes this and is there a fix for it? I know that people are saying something about the cold. I had a 2018 Stinger prior to this one and never had that happen. I hope this doesn’t keep happening as it’s pretty cold here for a few months Thanks for the info

As far as I know there aren't any "official" fixes for the issue. I've read some mention about the wastegate being a possible issue. The only actual "fix" I've read is to put a tune on the car which obviously you won't be able to keep on it if you bring it to Kia to attempt any warranty repair.

I'm almost tempted to make an attempt to purposely trip the overboost condition multiple times over consecutive drive cycles to force it to trip a code. But then I'd have to hope Kia's techs are actually skilled enough to do something about it instead of reset the code, give it a test drive and say "It looks like it's good now". Also, I really don't want their techs driving my car hard enough to cause the overboost condition.

 

[SRV]

That makes sense! I just bought a reader so I’m going to plug it in and see what I get once it happens again. Do you know what causes this and is there a fix for it? I know that people are saying something about the cold. I had a 2018 Stinger prior to this one and never had that happen. I hope this doesn’t keep happening as it’s pretty cold here for a few months Thanks for the info

You never mentioned how you're driving the car when it goes into limp mode.

Also, is the oil completely up to temperature?