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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