Misfiring Engines With P0301 Code
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- เผยแพร่เมื่อ 4 ต.ค. 2024
- Scotty Kilmer, mechanic for the lat 46 years, shows how to figure out what's wrong with a car that's misfiring and has the check engine light on with code P0301 stored in memory. All you need is a brain and basic hand tools.
Things I used in this video:
1. OTC Scan Tool: amzn.to/2BIwPtc
2. Ratchet and socket set: amzn.to/2inoxOY
3. Mechanic’s Tool Set: amzn.to/2Bzmccg
4. Wrench Set: amzn.to/2kmBaOU
5. Shop Towels: amzn.to/2jGDfkA
6. Disposable Gloves: amzn.to/2zSRuxO
7. Common Sense
8. Full HD Camera: amzn.to/2AvoEk7
9. My computer for editing / uploading: amzn.to/2i2sKYz
10. Video editing software: amzn.to/2jv5Fhf
11. Thumbnail software: amzn.to/2k7tz6C
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Things I used in this video:
1. OTC Scan Tool: amzn.to/2BIwPtc
2. Ratchet and socket set: amzn.to/2inoxOY
3. Mechanic’s Tool Set: amzn.to/2Bzmccg
4. Wrench Set: amzn.to/2kmBaOU
5. Shop Towels: amzn.to/2jGDfkA
6. Disposable Gloves: amzn.to/2zSRuxO
7. Common Sense
8. Full HD Camera: amzn.to/2AvoEk7
9. My computer for editing / uploading: amzn.to/2i2sKYz
10. Video editing software: amzn.to/2jv5Fhf
11. Thumbnail software: amzn.to/2k7tz6C
🛠Check out my Garage to see what I use every day and highly recommend:
www.amazon.com/shop/scottykilmer
❗️Check out the Scotty store:
goo.gl/RwhRGU
👉Follow me on Instagram for the latest news, funnies, and exclusive info / pics:
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Scotty Kilmer
Hope your day is going good.
I wanted to ask if its fine to drive a 3.0 v6 with one of the sparkplug not working. Technically its not misfire. Its the whole time. Loss of power. Head gasket is good no smoke coming out. Is it fine to drive my car with 5 cylinders working and not one? Also could it be a lose wire or distributer?
Where's the link to 'common sense', lol!
All that unburned gas could wash the oil off your rings and get into your crank case. A master mech once told me that after getting a low compression reading... said the oil from misfire washed the seal off the rings.
I have a 2004 Honda civic lx . Went to auto zone they told me 4 cylinder misfired I changed all 4 spark plugs and still have 4 missfires help
I subbed.
I love you. Seriously I do. You *actually* tell people what to do and how to fix things (also what not to waste your time on). As a single mother on one (LIMITED) income and "intermediate" knowledge of auto mechanics...you help me tremendously!! THANK YOU!!!!
javier josefides Huh?
@javier josefides a female telling a male that sounds gay to you?
Hey Scotty, I just used the switching the coil method for my Mercedes C300. It worked perfectly because the problem did move to the other cylinder. Thank you for the knowledge you pass along.
Scotty I love your videos. I wish I could find a mechanic even close to you. My mom has been robbed by the stealership for fixes that cost half the cars so I appreciate you giving me the knowledge to try and help my family out on a very limited income.
LOL Ur cat wants to come out of the house! 3:04
I thought you said the cat wanted "in" the house, and of course then I saw it pawing at the from inside glass..hahahahahaha...
MrRangerZr1 Ha 😆 I didn't notice
MrRangerZr1 Lol!!! Good catch.
Hahahaha what a catch
Haha 😂
Hello Scotty, last weekend i had a warning ( check engine ) . I checked my engine with the ODBII and had a code P0300. I replaced all 4 sparkplugs and now my engine works great and have no warning signs. I did another check with my ODBII and have no faultcodes.
With the help of your video i saved a lot of money and my engine ofcourse. I made also a testdrive and everything is smooth...So Scotty thank you for your great tutorials. Gr.Marc from Belgium.
Learned so much more than just the spark plugs and ignition. Now I know when the engine is worn out and should just be replaced or trashed and shouldn’t put all that effort into an engine rebuild. Thank you Scotty!
I’m glad we’re on the same boat
WOW. Skip the chatter, right to the point! I like your style. Others would have needed 25 minutes to explain that.
If I had a shot for every time Scotty said "flat worn out" I'd be flat worn out
Scotty, when I see these videos I appreciate even more my Honda and Toyota..
carlo mango
I agree, Toyotas are the best.
I hate that P0301 code....with a passion...
Why?
@@BurningAlexandriaanything could make it happen could be vacuum, spark, air or some random sensor causing a random misfire it's a pain to diagnose
I feel ur pain.
Me to
I fixed my problem. Spark plugs & 2 new coils.
Thank you Scotty. Ive been working on my Mother In-Laws car today, a 2011 Chevrolet HHR. You just help me figure out what's wrong. I watch your channel religiously!!!
Scotty is the grandfather of mechanics! I’ve been getting help from him since I got my first vehicle 10 years ago
I am so grateful for you scotty!! I’ve watched so many of your videos and continue to learn from you!!
I got a 2001 pathfinder for free because of the p301 code it turned out to be a $150 fuel injector. Its got 255K on it now and it runs like a champ. I've always had good luck with chevy pickups and ford pick ups,a always run them to 300K no problems but now I see that japanese cars can run to 300k even when you abuse them and don't take care of them. In Iraq our unit had these beater land cruisers we used to drive around to the gym or dining facility, never changed the oil on them, I bet they haven't been maintained for years in that 130 degree heat but they ran decent unlike the 2011 ford f150 that blew its engine our last night in country. My LT had us leave it in a field with the keys in it.
If the Audi was pre-2009, it's most likely carbon build up. The FSI engine is the most carbon build up prone engine ever. It was VW/Audi's first turbo 4 with DI. The engine wouldn't be wearing out, those are solid engines. But as you said, it did lose quite a bit of compression.
Fixed my Mazda CX5 with a Battery and spark plugs swap. Thanks Scotty!, 2015 226,000 and still starts right up and runs smooth
this guys great always on point and extremely helpful, thanks scotty
Your channel is without a doubt one of the very best.
Keep it up Scotty 😊
Thank you for this video I swapped the bad coil number 3 and swapped it to number 1 cylinder drove it for a while and it gave me p0301 which was cylinder 1 swapped the coil and misfire code was gone thank again for the advice
THANK YOU
Fixed my own engine today for $4!!!
Bless you bless you bless you
Wha did you do for 4 bucks?
anyone else notice the cat at 3:06?
lol
Lol Let me out!
Guy Garic yes i gat it kkkkkkkkkkkkkkkkkkkk
😂
Guess them Piston Rings are Shot. Changed my oil and transmission fluid & Trans Rear main seal on my Firebird on Sunday and listened to your Sat Live show while doing it, sure is a pleasure to have you under the car with me Scotty :) Modovates me to get the job done
It could also be the head couldnt it? Like maybe the valve stem seals leaking?
Oldie but goodie! Just had this problem on my 2003 Nissan Sentra 1.8L. P0301 even after I did this time proven Scotty Method. I guess I'm running it till the wheels fall out. Thanks Scotty!
I really like your videos. I bet you'd be fun to drink a few beers with lol. I rarely need any advice with auto repair, though I have learned a few tricks from you that I just never had thought about before. I just like to watch your videos. Keep up the good work!
I fixed this problem on my 2003 A4 last night it was fuel injectors. I changed out all 4 and the problem went away instantly. I had already tried the plugs, coils,and was about to do the PRV and PCV valves. I think oil leaking out of the dipstick tube got into the injector wells and over time seeped into the injector housing of cylinders 2 and 3. Watching Spectre in the theatre made me rush to get this job done so I can go driving at high speeds again. Thank you Daniel Craig!
Always loved your videos, very short and very explicit. By the way, you forgot to walk the dog 3:05
Hi Scotty. This video helps me a lot, I mean, after all research on TH-cam and internet, I came to conclusion that my Nissan Pathfinder 1999 with more then 212 k miles on it, actually getting to the end. The last step left for me to check is compression test. I did almost everything to fix missfire on cylinder nomber 3 with code PO303 and also PO300 as wll which is one of the worst codes one can get. ? Spent good amount of money to replace O2 sensor, EGR valve, spark plugs, wires, brand new fuel enjector for no, 3 ., also I replaced both valve cover gaskets which is pain in a butt expecially driver side undr the plenum. . I've had some confidens in myself and I beleived if I do all that I may fix it, . After all that I did test the car and nothing has changed. The car still shaking when on stop and cant drive up hill more then 35- 40 mph. So I will do compression test and if it's too low, I will sell to junk yard.
Scotty, If the air cleaner is not properly sealed you'll get crud on the plugs. Not necessarily "worn out" !!!
Thank you for your video it saved me thousands! Your tricks worked like a charm.
Thanks Scotty! Confirmed my suspicions about expensive imports. Your videos are awesome Bro!
What suspicions? Do you know what's the mileage of this car?
I searched misfire on your channel and it seems you do a new one of these every year lol. Which is helpful, since I plan to look at a 2000 Crown Victoria with 240k miles tomorrow that misfires but only when it's warm and accelerating. Not sure on the code yet, but thanks for these videos!
hahaha in the back left window at 3:04.
lol.. but damn that was a hard detail to notice !
Nice cat photo bomb.
i literally came to the comments just to see if anyone else noticed it! lol
Jason Byers lmao
Got an exquisite 2004 Nissan Sentra 1.8L Turd, P0301 and Pending P0300. Swapped ECU, Coil Packs, new injectors, PVC valve, New Variable Cam Timing Solenoid, new MAF. Found I have a clogged exhaust (seperated manifold from engine block) Idles now but still P0301. Piston head wet with fuel, spark plug unfowled.
How old's the Audi? It looks so new from what I see. Shame the engine is bad.
The b6 chassis (I know it's one because it's what I drive right now) lasted from 2002-06
If it is the turbo then you can bank on it being driven hard and fast....imo.
My friend had a similar problem with his 99 civic. Did a full tune up still misfired. Come to find out the fuel injector for that cylinder wasn't firing. The plug looked fouled up, which later was determined from running too rich due to bad injector
Loved the fact he was str8 up about it and got to the point quick 👍👍👍👍👍👍👍👍
Is it the direct injection the problem causing wear because the intake ports are clogged with EGR/blowby crap ?
before the gas goes to the intake, there is a Oil/water separator, right? I am not sure if catch can works, I think it is a scam
No,only on diesel fuel system.
"catch can" are for gas engines only.
They work if well designed but there are not from factory on cars.
That's why i think it caused wear on this engine.
I believe the trouble is that the gas is injected directly into the combustion chamber, thus making the intake valves and the piston in the compression cycle work only with air around them. Though it may look rough, gas for a part plays the role of coolant and lubricant in an engine. That's why you got to choose wisely your gas and not just take the cheapest, for your valve's sake
Ok.
i agree,same problems on diesel engines : the intake valves are full of blowby /egr deposits.
but here the loss of compression is not only caused by leaking valves no ?
cylinders/pistons wear ?
too much heat ?
What wore out ?
michaelovitch
piston rings ? because of compressing air without fuel ? diesel fuel is greasy and may be sticking to the cylinder walls, but not gasoline ?
Good tips Scotty but you missed a few possible causes. I pulled a spark plug from a friend's car that was getting the P0301 code and the spark plug looked good.
1. It could be a bad ignition coil as you said.
2. It could be a bad fuel injector or bad electrical connection to the injector.
3. It could be a bad intake manifold gasket.
4. It could be a bad spark plug wire.
I worked on other issues (P0410 code & trunk lock) on his car and haven't got around to this problem yet.
I checked for everything as far as coils. Didn't check plugs, but saw a pebble in the cylinder. i sprayed the heck out of that cylinder with compressed air. The amount of debris was unbelievable. The misfire is gone.
If you check one of his other vids about misfires, he mentions most if not all of these possible causes.
hey scotty when ever i drive my brothers car and come to a complete stop the car vibrates and the rpm go up and down slightly
the car is a 2007 mazda 3 2.0
+Kevin Yaretz do my video "finding engine vacuum leaks with a cigar" and also "how to fix a car that idles poorlY"
Hi Scotty,
You see on a lot of these Consumer Reports most reliable car brands that Subaru is on the list.
Do you find this to be the case? Or is subaru still having oil burning, coolant and headgasket issues?
I have an '01 Subaru Legacy and the engine has been fantastic. Owned it 10 years now
Glycerin fluid film it or krown spray it so it doesnt rust out
The video was useful and you have a wonderful and funny style, thank you 👏🏻. I have a question - can the type of oil in the engine be the reason for spoiling the engine?
can an oil leak cause misfire?
ive noticed my 03 passat has serious oil leaks....
yes, espeicially head gasket leaks will
Scotty Kilmer Thanks
SCOTTY, when I replace my spark plug, the old one, have brow stuff round the 5/8 lug.
Thanks once again Scotty, got an Audi A3 that misfiring and wasn't best looked after. Was going to do some ither work on it but after watching this will just keep changing out the sparks until its done
There seems to be a lot of unnecessary Audi bashing here. These cars are complex and require diligent maintenance. There were obvious signs of neglect in this car: the "Service!" warning was on and spark plugs were filthy.
Since the first owner would have had their service done under warranty at the dealership, I wonder if the second or third owner actually did proper maintenance. A competent mechanic would have alerted them to the "gunk" on the spark plugs had they been replaced every 3 years according to the manufacturer. More importantly, how frequently was the oil & filter changed and/or topped up?
P.S. The the engine has 152k miles...hopefully the timing belt was already changed!
I agree my audi diesel has 234k!
yeah bmw's have tons of problems with the chains
vismortis
yes Audi's use timing belts. they're a pain in the ass to get to b/c you have to dismantle the entire front end of the car. it's one of the worst designs ever. so if you're ever doing a timing belt service on an Audi, replace any and all wear & tear items in there. bc if it's not bad at that time it will go bad eventually and then you'll have to take everything apart all over again.
scotty kilmer is the best.... about to fix my tahoe 96 cylinder 6 misfire thanks to all of kilmers misfire videos
Carbon buildup on the intake valves due to direct fuel injection may be the problem on this one...
supposed to be...a carbon on valves and within the intake manifold.
Common problem with fsi engines especially if they are used in town
do you think having the dealer do a chemical decarb or using bg44k can help?
Can help a little but is far more efficient to clean it manually, specially the back of the valves (is not that expensive). Extreme cases need a total rebuild to clean everything and that is VERY expensive.
Perhaps some sea foam could help a little
This is by far the best video information I've heard on this subject. Great job
0:20
an audi in its natural environment
U aint lying lol
Story of my life
Try a Volvo sometime.
Looooooooooool
B6 s4 here
Scotty i'm an audi and VW technician and that compression shows the valves has a lot of carbon build up on the valves specially on cylinder number 1. It's and easy fix. Remove intake manifold and do a carbon clean. The engine sounds fine.
Idk why I'm watching this like ima pop the hood np. I don't know wtf im doing here?!. Lol I guess my car just likes to dance why would I stop that ..keep pushing!!!
sunshine you look fine!
Glad I found your videos. I'm having so many car issues with this dumb misfire code.
Worn out engine at 150.000 miles.
German myth busted.
Like Scotty said, changing the old is a good thing. Also, the older German engines were better quality and made to last. my mercedes 190E 2.6 has 215,000 miles and runs like a champ, and I can pull a plug and it'll be so shiny you'll see your reflection lol
Well it all depends if the person took care of the car properly or not, Sometimes people who guy those Luxury German cars or Luxury cars in genral forget that regular maintenance greatly improves your car's life span.
HyralProductions I bet that you are not driving a post 2000 german car.
If you would, your 318i would have shat itself a long time ago.
Modern cars are disposable. You buy it. Drive it until the warranty expires and sell it to next poor soul. Even though materials are stronger and more wear resistant then ever, the engineering is intentionally flawed or better said geared towards costs and efficiency rather then longevity.
Nothing would outlast a 70's merc engine. Just look at the very appraised BMW 2 litre diesel, fitted to most of their cars since 07.
They moved the timing chain towards the back of the block and it fails quite often.
Tyrone Ross except alot of cars in the late 60s, 70s, and early 80s were crap.
Also with new cars now, not all of them are throw aways, it depends if someone's willing enough to keep the car after 5 years or not.
I had a '96 Mercedes C200 that had 228,000 miles on it before it finally died from ECU failure. Up to the point it conked out it drove like a car with less then half the miles on the clock.
The Man
The Legend
Scotty Kilmer 🔧
Japanese cars, they last forever.
Uh.... DEFINITELY NOT lmao
Lol
Nissan is my biggest trauma ever!!! Beautiful and fancy, but fragile as hell!
Not really... get a Toyota instead
BMW forever
Scotty, you often point out German cars are too fancy for their own good. I wonder what do you think about Japanese turbo charged engines like those on Mazdaspeed and WRX, or even Evos.
Woah that Audi sounds like shit. They're not the most reliable cars but this one was flat out poorly maintained. It boggles my mind how people can be so clueless about cars, I bet the owner just wanted a fancy badge but didn't want to maintain the car. There's a big difference between being able to buy a car and being able to maintain it.
haha, @ 3:06 the cat is wanting out! look over Scotty's right shoulder...awsome videos btw... I watch them all the time!! what year/model is that Audi?
Scotty you are a wizard! :D
If you like my car help, be sure to watch my live car talk show every Saturday morning at 10 AM CST on TH-cam. I answer your car questions LIVE there. Just check it out at How To Ask A Live Mechanic Car Questions Free On TH-cam . And remember, every TUESDAY I upload a new video, so don’t miss them.
Scotty Kilmer Scotty have a 2001 Audi A4 Quattro
turbo 1.8 L and I have already replaced the housing for the ignition coil connectors. I am not sure if the ignition coils are damaged but when I replaced all the pins and the housing all the wires were either damaged or broken. Soon I will need new wires for the system to work properly but like you said I will start with the spark plugs first. It is running real rough and got this when I went to my local auto zone:
P0300 random/multiple misfire detected
P0302 Cyl 2 misfire detected
P0171 fuel system too lean cyl bank 1
P0011 ?A? Camshaft position timing over-advanced bank 1
P0301 cyl misfire detected
The first connector had all wires broken and I spliced them together but seems like it didn't work, what is best to do?
Juan Higareda I might be a little late but. You might have faulty wires to your computer or bad crank shaft sensor. But it could be a bad timing belt.
Watched it again, awesome explanation thank you!
Oh look it's an Audi.... not a surprise. You buy expensive stuff, you get crap in return.
My ass
You get crap if don't care about your car...If you do a proper service once a year and oil change at every 8000 or at least 10000 km, any car will run fine for a longer period. In my mind the only problem with these german cars is the owners.
Gabriel Ionescu but sometimes a car really is just crap
austen cody not audi
My audi has 235000 miles. no problems. Japanese cars are bland and american cars are made with poor quality products.
i had the same code this morning on my Challenger and thankfully it was just a loose fuel injector connector!
smh... buy a toyota or lexus. engines last forever
My lexus is 250 and just broke down due to this problem ...😂
Can you please talk about DEFECTIVE VCM/ECO in Honda vehicles and the suggestion that we muzzle them? Thank you for sharing your mechanical knowledge with us.
Lmao. German cars. No wonder ive seen LSx swaps done on BMWs.
Wow this really helps with my understanding of my code! I’ve been trying to fix this for a while ! Sadly it still doesn’t drive ! My car for some reason threw that code , then it stopped accelerating while in D ,3 , 2, 1 . It goes in reverse perfectly good though 😅
Bad maintenance
love your vids, Scotty. 101st Airborne Infantry Vet here as well, brother! (1-506 Snipers)
Wow. this is another reason i only buy Japanese.
The only time I would by German was when I was stationed there because every other type, especially 4x4s and pick ups were impossible to find parts for.
I had this issue in my mustang. Happened after I bought new "performance" coil packs and Bosch spark plugs. Had 3 of the 8 cylinders with this code. Went back to the stock coil packs and autolite spark plugs and never had this problem since.
Best car videos around TH-cam, but you gotta love the cat in the back behind Scotty's left shoulder at 3:06 scratching the window profusely🤣🤣🤣 cracked me up.!!!
That audi is still better quality then your american made cars. The reason the engine is worn out is just because it wasnt maintained good enough.
Audis are crap garbage chords I buy and sell cars and every time I come across the Audi they got engine problems so you mean to tell me that every single person that I came across who owns a busted Audi was the owner responsible
Scotty, you are the man, right to the point.
What other issues might cause a misfire on Cylinder #1. My son has a 1997 Kia Sportage and we've replaced all the coils, plugs and wire and no matter what we do, after a short drive it comes back with the check engine light and P0301 on C1. Compression test on the engine came it right on spec. Also replaced all the fuel injectors.
bad computer circuit, blowing head gasket, worn valves, or leaking intake manifold gasket
Would a bad EGR or Fuel Pressure Reg cause the same type issue?
Hey Scotty, I have a P0301 in my 2006 Chrysler Town and Country 3.8 liter V6. I replaced the coil pack, wires and spark plugs. Still gets the misfire. I held a big screwdriver against the fuel injector and I can hear the tick so it should be working... Any other thoughts on this?
I really like this man, Thanks for the video.
My problem is I tend to over-analyze the problem. I kept thinking it was the coil or the wires leading to the coil, because the wires harness plugs were so deteriorated. I had to re-pin them, but that didn't solve it. Guess what it was? The spark plug gap on cylinder 1 was .004" from some numb-nuts dropping it on the ground. Of course there was a misfire, there was no gap. Check your spark plugs! Much appreciated video Scotty!
I like the way you tell it like it is Scotty!
Gotta love how Scotty has opinions about every car maker and knows their flaws and on top of that subtly criticizes them in his videos.
been working on them 49 years now, so I know a bit about what's good and what's bad, just like santa claus
Hardly speak out on the interwebs, that being said you bring an awesome edge to diy channels. Keep it up brother!
Hey Scotty, i have a 2002 honda civic ex ,manual transmission. I developed misfire on all 4 cylinders.i change sparks plugs,coil packs and fuel strainer in the tank but the problem still persists..im not sure what else to do.
Okay Scotty, I have a 2009 Toyota Camry. The check engine light is not on and it is running great and smooth and everything. But the P0301 code still showed up even though there is no check engine light. What could it be and how can I fix it?. the check engine light was on and so was the VSC light and the car swerved off the road a little and engine stalled and lost power. But once I turn the car back on. Both of the lights were off and Never turned back on and the car ran good all of a sudden.
you remind me of Bubbles from Trailer Park Boys.
Great video, I don't even have an Audi.
I am getting P0301 and P0302. Swapped coils, plugs, and checked continuity of Ignition coil wiring to fuse box and still getting same reading..
Hi Scotty my didn't have no spark plug number one would that cause it to run rough idle should I go ahead and put one in or just leave it out
hey Scotty long time fan! first time comment. just bought a 2006 passat 2.0T with all kind of misfire codes. I will be replacing plugs tomorrow. my question is how many miles did that Audi have on it? I have 188k miles and am wondering about how long (estimated) the lifespan is typically on these motors.
140 thousand iles, you car is getting near its lifespan from my experience too
Scotty I like your common sense approach. Favorite car repair channel :0)
Hey Scotty: At the end of the video - Your Corvette sounds rough, is this how it really sounds ?
Hey scotty my 2010 prius check engine light came on and in read a misfire on cylinder 1. My mechanic replaced the cylinder and still doing the same. What do u suggest. Or what should I do ? My odometer reads 119,000 mi.
Love it. Thanks Scotty!
thanks I will have to check the fuel injector after I change the coils and spark plugs
i have read that in forums that it has valves issue and that correction is head job
Hey Scotty love ur videos I have 5 codes coming up for po 300,301,302,303,304. I know they r for sparks plugs and wires. I replace them all and I’m still getting that codes. My check engine light is blinking on and off when I’m driving what else can it be. I drive a 2005 Honda Civic ex can u tell me what ur could be and how much would it cost me to get it fixed thanks.
good info on the spark plug. I'll go check the #4
I checked and it's fouled up. I guess I'll drive it till it drops
i have a p0301 code but I have oil in 1 of my spark plugs, I'm guessing its my valve cover gasket but im not so sure, what do you think?
That was very informative thank you lots
Scotty im haveing exactly that. Multible missfire. Already changed the plugs. 2015 ford fusion. I am a mechanic but it doesnt hurt to get second opinion. Was checking videos and they recommend change 02 sensor. Have not done the leak check but my computer does show a code . So what do you think i should do first?
Would a bad pcm make a P0204 code on a 2001 Chrysler T&C 3.3L the injectors are fine. Wires and plugs and coil pack are fine. It's like its just not telling that one injector in particular to turn on and off. I already swapped places with another injector.
Can you do the same thing with the spark plug wires to see if it is one of the wires?
Scotty love your channel. I have KIA Spectra 2001. Should I use spark plugs IKH16 or IKH24?