I’d classify a fuel injector as part of the powertrain. But the folks who wrote the warranty language might not agree. p0266 does suggest a fuel system problem. Suggest to tell us more about your car. Is it a hybrid, plug in hybrid? If conventional engine, which engine do you have? Ask your shop if a fuel system gasoline treatment, product you add to the gas tank, might be a good place to start.
To determine if it’s covered, you need to have the dealer determine what the problem is. Then they will discuss it with Hyundai corporate and they will determine if it’s covered. If it’s covered, you will not be charged a diagnostic fee. If you delay, it will go out of warrant an it definitely won’t be covered.
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Fuel injectors are covered by the emissions warranty for 5 years/60,000 miles. A warranty booklet should have been included with your owner’s manual.
For PZEV certified vehicles registered in California and other select states, the fuel injectors are covered for 15 years/150,000 miles.
Why ask google when the dealer is a phone call away, just have your VIN ready… Or maybe even take a drive down there…
Nevada also posted it for you…
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+1
Some of their responses are now written by A.I., and they might not be valid. I read recently that a teenager asked Google what he should do if he is being abused by his parents, and–supposedly–Google’s A.I. response suggested killing them.
We also had a new poster say that the responses given by experts here were wrong because his AI source didn’t agree with them. He wondered why he should return if we can’t give him a simple answer that agrees with his AI source. I did not post a response to him, but I wondered why he came here in the first place if he had an AI response that he trusted above all others.
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The Hyundai dealer says I need a new fuel injector, $2100 - installed. They recommend replacing all four $3100, installed. My mechanic will do this for $580 (for 1) or $1200 (for 4). The reason that I was given (from the dealer) for installing all four is "it’s a matter of time before the others will start going and every time they’re installed the labor cost is about $1400. Any thoughts about 1 vs 4?
I’d go for a 2nd opinion elsewhere . . . it sounds like “my mechanic” didn’t even provide a definitive diagnosis. It sounds like all he provided is an educated guess, imo
Replacing all 4 injectors seems a little drastic, imo
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I thought this was solved by a new plug and coil? But I guess not. I’m confused. But anyway…
Whether I would do all four injectors or not depends on how much work it is to get to them. If it’s a ton of work - which apparently it is - then I’d go with all four. The labor charges will be the bulk of the cost.
But, as @db4690 said I’d want to make sure that’s the actual problem. I’d also ask someone to do a fuel injector cleaning service first to see if that does any good.
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The plug and coil took care of the 1st issue and was fixed over a year ago, this is a new issue…
I had all 4 fuel injectors replaced. This solved the problem and my gas mileage also increased. Today (7 months later) I now have the following code:
P0302 $7E8 Generic Cylinder 2 Misfire Detected
I’m hoping it’s just a bad plug or coil but I’m wondering why it’s Cylinder 2 again. Coincidence?
So we don’t have to read through all the post again, where did you buy the spark plug(s?) and coil from??
Have you carefully inspected ALL the wiring associated for #2 . . . the wiring, connectors and terminals for the injector and coil
Was a compression test ever performed?
Has anybody attempted to rule out that the pcm isn’t somehow the actual problem? This would be a little more uncommon, but sometimes it does happen
And as @davesmopar already asked . . . where have these parts been coming from and what brand are they?
I didn’t buy these myself. My mechanic replaced them.
Sounds like you need to see the mechanic again.
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As Mr Volvo said, contact your mechanic to find out if the coil is a AutoZone or Amazon/eBay and or was the OEM plugs, NOT OEM type, but OEM plugs were installed… But if you are having a mechanic do all your work then you might as well just take it back to them…
Did you have all 4 plugs replaced, and did you go with 1 or all 4 coils??
If you are doing any of this yourself, then swap 2 coils to see if the misfire follows the coil or stays the same, if it stays the same then swap plugs to see if the misfire follows, if the misfire follows one of them then replace said part… To doble check, you can swap with a different one just to make sure the 1st swap wasn’t a fluke… Just write down what/where parts you swapped around..
If the misfire doesn’t follow either the spark plug or ignition coil, then follow up with a dry/wet compression test… Hint, easier to do the compression test while the spark plugs are already out while swapping the plugs around…
Let us know the results and we will take it from there…
I’m sure most all this has already been mentioned… lol
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Pull the plugs and inspect them. If #2 doesn’t look like the rest and is wet or otherwise polluted, it may be a problem with that cylinder…
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Latest news. The problem happened again. This time on a weekend when I couldn’t use my usual mechanic. I decided to do some research and the research made me think that I should have a thorough diagnosis from the dealership. I asked them to do this. They said the charge was $240 for a diagnosis (waved if they do the repair). They ended telling me that there was a misfire in cylinder 2. I already knew this. I told them this when I came in. They said the problem was that there were “after market” spark plugs and coils installed and this is what’s causing the problem. I had asked them to do a “thorough diagnosis” and they said that once they saw it was misfire with after market parts, there was nothing to do but change all 4 spark plugs and all 4 coils for a cost of $2000 plus tax. They said, if this didn’t work, only then could they look deeper. I did not have them do the work and I am disputing the diagnosis fee. (Also, they added on a shop fee, which might have been in the legalese of the paperwork, but wasn’t verbally mentioned.)
As a temporary measure, I changed the spark plug myself in cylinder 2. This was the first time that I actually did any work on this problem myself. At the moment, the problem has gone away. When I changed the spark plug, I felt there was oil on it. I’m not an expert on oily substances. Maybe this was dielectric grease. But, it seemed to me that it could have been oil.
In case it helps to know this, at one point my mechanic swapped the coils from cylinder to 2 and cylinder 4. After that, cylinder 4 had the problem. Except for that one instance, it’s always cylinder 2 that has the problem, including this last time.
One side question. I was advised to use higher octane gas. When I did this, my gas mileage did seem to improve a little. When I did some research, it appeared to me that higher octane gas isn’t helpful for my particular and that I’m just throwing away money by buying it.
I am very interested in hearing everyone’s thoughts about this.
You owe the dealer the charges. You could buy the correct parts from the dealer and have them installed but then whoever installs them does not have to warranty the parts. Frankly this almost sounds like you need a different shop or tradein time.
I’m not saying that I disagree, but I’m wondering about your reasoning. I asked them to do a thorough diagnosis and all they told me was that they would first try this one thing (and charge me $2000 for it) and then if it didn’t work, then they would look further. Again, I’m not trying to be disagreeable, but why do I have to pay if I asked them to do something - and they agreed - but then didn’t do it?