P0306 Explained - Cylinder 6 Misfire (Simple Fix)

Рет қаралды 433,318

Күн бұрын

The FIXD wireless OBD2 scanner and free app for iPhone and Android translates your check engine light into plain English so you can rest easy. In this video, we explain what OBD2 code P0306 means and possible causes.
P0306 means that cylinder number 6 is experiencing misfires.
A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is what provides the energy to power the engine. A misfire from one or more cylinders can be caused by many reasons from a faulty ignition system, fuel system, or internal engine failure.
When P0306 occurs, it should be fixed immediately as long term driving with engine misfires could cause consequential damage to your engine. Many times, P0306 occurs when there are worn-out spark plugs, spark plug wires, or a faulty ignition coil.
Want to learn more? Check out our blog ➡️ www.fixdapp.com/blog/p0306
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0:00 P0306 - Cylinder 6 Misfire
0:45 What is a Misfire?
1:01 Four Stroke Combustion Cycle Explained
1:32 What Causes a Misfire?
1:37 Common Cause of P0306 - Vacuum Leak
1:59 Common Cause of P0306 - Fuel Leak or Congestion
2:23 Common Cause of P0306 - Ignition Coil or Spark Plug
3:37 Other Possible Causes of P0306
4:15 Happy Driving!
#FIXD #P0306 #checkenginelight

Пікірлер: 152

@chasemoon4774 5 жыл бұрын

Crystal clear, thanks so much for the help

@fixdapp 5 жыл бұрын

Glad to help!

@CONMAN-gx1qr Жыл бұрын

Never assume someone knows something when you're teaching them.

@TattedColoradoMama Жыл бұрын

🤣😂🤣😂

@RJSOONER24 2 жыл бұрын

Imagine explaining that a Cylinder 6 misfire cannot happen in a 4 Cylinder Engine.

@MajDuty 2 жыл бұрын

I have a P0306 on my 2000 Tacoma, and even though 'they' told me it was likely, spark plugs, wires or coils, or an injector - I think it is the mass airflow sensor. Why? Because it is an existing, known issue. Many years ago I had the MAF cleaned instead of replacing it and that fixed the issue for years but now I have this CEL and I wonder if it is the MAF and not actually plugs or wires or coils, or an injector? What do you all think?

@deebee9751 Жыл бұрын

Thank you bro for that diagram map of the location of the cylinders. It helps so much.

@ericmorales2535 2 жыл бұрын

Have a p306 and p0300 misfires detected in all cylinders, i replaced all 6 sparked plugs and one coil on my 6th cylinder and still showing codes, any suggestions. Also have a small vacum leak p0456 ...2011 mercedes c300...

@daviswright7906 5 жыл бұрын

Awesome video! My CEL just came on, and now I know what I need to fix. Thanks FIXD!

@fixdapp 5 жыл бұрын

You're very welcome Davis! Best of luck.

@jp2555 3 жыл бұрын

Thanks for the simple explanation 💯👍

@bilalmohamad3991 3 жыл бұрын

my car is Passat cc 4 cylinder and yet im getting the code error p0306 which means cylinder number 6 ? is that normal and what should I do since there's no cylinder number 6. please help

@isabellableu97 11 ай бұрын

Great, detailed explanation! Enjoyed, the happy animations!!! Thank, you Subscribed 😁

@shonfullerjr1762 4 жыл бұрын

I have a 4 cylinder, Mitsubishi galant 2006 and I got this code. What could that mean?

@alexrebmann1253 Жыл бұрын

Have p0306 code on my 3.6 chrysler 200. Cant swap plugs or coil. Have to take intake manifold to get to them. Once I swap I have to put manifold back on to test them. If swap does work have to take manifold off again to swap again.

@julianjuarez5508 Жыл бұрын

What if all my cylinders are misfiring would would be there reason my vsa light comes on and my van doesn't wanna keep charge and start it lets me reverse but doesn't let me go forward they said it could be a sensor but idk what sensor

@johnvalle7756 3 жыл бұрын

Great tips 👍 really helped me out 👍

@Unsolvedone 7 ай бұрын

By far the most concise & informative I've yet to find.....thank you for class. ^_^

@marvinlecky8288 4 ай бұрын

Ok i am having that code on an a dodge 3500 promaster i hve changed the spark plugs coil and injector still same thing what could i look at next also i did a compression test all cylinders passed

@miguelmunoz5746 3 жыл бұрын

I replaced my distributor cap, rotor, spark plugs and wires last year and about 1 month ago i started getting cylinder 6 misfire should i check for the other things or check if those parts are faulty

@miguelmunoz5746 3 жыл бұрын

The thing that looks weird is the cylinder 6 plug wire is curved, could that have something to do with it ?

@burbman60 Жыл бұрын

On 5.4 triton a cam follower could pop out and cause misfire, you can go through all the things mentioned in this video and still have an engine that is stumbling. Take the valve covers off as a last possible diagnostic, poke around looking for parts out of position.

@hubert-williams3379 2 жыл бұрын

Ok Champ, I'm confused.. I have a 2003 ford Expedition.. 8 cylinder .. I changed all coils and plugs myself... coils were $35 ea.. plugs were $2....I made this purchase 5-6 yrs ago they are a little more now... If I had the dealer do the work I would be out $1000 plus.. I'm saying you are quoting parts list cost for which vehicles??

@yaraiverymooreburgos 3 жыл бұрын

amazing thanks

@okieaudits4115 5 жыл бұрын

In your graphics you show the cylinders being 1 2 3 on the left hand side and 45 and 6 on the right. I thought they went alternate from right to left.

@homer46303 5 жыл бұрын

Depends on the engine manufacturer with how they number the cylinders. I've seen both patterns.

@adesojiadeyeye423 5 жыл бұрын

@@homer46303 I have a 2012 Highlander V6, how is the arrangement of the cylinders? Thanks

@karleneyoung4721 8 ай бұрын

My 2006 ford f150 can drive perfectly until I am going to park when I’m driving slow or turning into a parking spot. Then it begins to shake and stall out. I just for this code yesterday when driving uphill. Anyone have any ideas as to what it could be? A friend told me could be mass air flow sensor

@Yung_DDG 2 жыл бұрын

Is there anyways it would be the spark plug lines?

@innovativethoughts 4 жыл бұрын

I have a Saturn l300 2005 I'm having a po306. I change the coil pack and spark plugs and wee k s later I got the po306 code. Could it perhaps be a fault inside my ECM?

@AbstractionVideography 3 жыл бұрын

Did you figure out what it was?

@innovativethoughts 3 жыл бұрын

@@AbstractionVideography no my car just been sitting.

@videoman1970 4 жыл бұрын

Thanks!

@osamabinpackinjr2813 2 жыл бұрын

Changed my coils and plugs and still got cylinder 6 misfire please help me I got a g35 2003 sedan

@LiLMelo202 Жыл бұрын

Thanks for this video! I also have the P0446 code on my 2000 Camaro (Purge Valve). Do you think replacing that will fix the P0306 code?

@aaronreyes6485 4 жыл бұрын

I have a 08 Nissan Altima .my car shut off suddenly while driving now don't turn on atval. I put daxsxanner on it and it gave me p0306. I don't understand it. Please help. Wat do u do and what does it ,mean

@asterix867 4 жыл бұрын

Have you found the problem ?

@alexcespa2288 4 жыл бұрын

i changed the spark plugs, coil packs, and injectors, any clue what can be causing the misfire? only happening in cylinder 6, no other cylinders

@TheCastedone 4 жыл бұрын

A short? Fuel related?

@danielallsep8118 3 жыл бұрын

Ecm

@1ncursio277 2 жыл бұрын

I have the same problem on my 1999 V6 Camaro, but when I changed the old sparkplug on cylinder 6, it had oil on it and such. Any thoughts?

@anomalouswoof2554 11 ай бұрын

The valves in your 4-stroke piston animation are operating in the wrong direction. Open is down. The valves open down into the combustion chamber.

@TechieTard 7 ай бұрын

Yeah, do you want that piston slamming into the valve.

@twi11iams78 3 жыл бұрын

What if Codes P0171 and P0306 show together? That's what I'm getting in my 2003 Ford Expedition Eddie Bauer model 5.4L

@moose303 3 жыл бұрын

Probably the head gasket

@miguelceballos220 4 жыл бұрын

P0306 on 2013 ford f150 3.7 came in replaced 6 cylinder coil and all spark plugs worked for a few days then came on again and engine sputters pretty bad now?

@miguelceballos220 4 жыл бұрын

123 passenger bank then 456 driver right from front to rear?

@truckerlizzie8095 4 жыл бұрын

Have this same problem, changed the coil and plug, it came back worse this time and I was told that it could be what this guy said in the video.

@theleader5439 3 жыл бұрын

Had the same problem Ford ranger. It’s the cylinder heads

@ricardorocha6113 2 жыл бұрын

I got a p0306 cylinder 6 misfire detected code & suggested parts valve springs & valve cover Any advice ? ima check the simple stuff before I go off buy the 4 valves springs & labor for cylinder 6

@Apphus144 6 күн бұрын

Any update?👀

@michaelfedyk1841 4 жыл бұрын

I have a 2016 f150 3.5 non EcoBoost , I have misfire on 6 cylinder. The codes are both p0206 & p0306 , I switched coils with number 5 & 6 And still have misfire ?

@Chillingworth 3 жыл бұрын

Ever fix it? I'm in a similar situation wondering what kind of money I'm going to have to spend

@michaelfedyk1841 3 жыл бұрын

@@Chillingworth The problem with my f150 was , A rat ate through the wiring on harness @ number 6 injector . I had to splice the wires together.

@pkpkpk17 5 жыл бұрын

If it is the spark plugs, wouldn't it be better to replace all of them? As they have similar lifespan?

@fixdapp 5 жыл бұрын

Good question PK! Yes, we think it's better to go ahead and replace all of them if you're getting to a place where one is worn down enough to trigger a code. (i.e. a 50,000-mile mark) There is a method to our explanation though. For the sake of clarity, we want people to understand the individual spark plug is related to a specific cylinder. Also on the off chance this is happening in a new car - we want them to understand it could be a single faulty spark plug. Not engine failure. Cheers!

@0021596754 3 жыл бұрын

Mines doing the same thing

@bilalrafiq7682 Жыл бұрын

Hey I have changed spark plugs, ignition coils and also injectors I’m still having the same issue. Cylinder 6 misfire what could be the problem can you help me plz. My wife accidentally put the diesel in it. So I drained cleaned the lines and changed everything mention above plz help me

@SharksFC3 Жыл бұрын

Did you ever get it fixed? My truck is having the same problem. We replaced the spark plugs, spark plug wires and one coil and it still is shaking and shifting hard.

@robmccaughey8351 4 жыл бұрын

Great video thank you! What do you think it is If the situation only occurs after the engine is warm?

@kevinavelar2297 3 жыл бұрын

I got the same problem with my charger, start shaking after is warm😞

@robmccaughey8351 3 жыл бұрын

@@kevinavelar2297 Took it for a long drive a few times and eventually the problem went away.

@mr-toyota 2 жыл бұрын

@@robmccaughey8351 check valve cover for leaks

@user-mf6sj8le5n Жыл бұрын

@@mr-toyota شكرا جزيلا❤

@mainoffender1 3 жыл бұрын

If the problem is a spark issue, will black smoke come out of the tail pipe when the engine is revved?

@mainoffender1 3 жыл бұрын

How long do fuel injectors last? Mine are original with 219,000.

@flyhightexas494 Жыл бұрын

Rule of thumb, it's virtually never one of the simple problems😅

@slipster 2 жыл бұрын

Same swap can be done with the fuel injectors to test as well see if the misfire moves to the other cylinder.

@stuartgray5877 Жыл бұрын

Except you must disassemble the entire top of the engine to get to the injectors so not a simple test.

@omegarex909 4 жыл бұрын

Thanks 👍🏽

@fixdapp 4 жыл бұрын

Any time!

@dean2swagg73 6 күн бұрын

i changed the o2 sensor, spark plug and ignition coil after i changed everything i manually cleared the code and it goes away for about 90 miles and then the light comes back on

@joshygoboom3470 3 жыл бұрын

Best straight to the point video ever thanks

@fixdapp 3 жыл бұрын

Thank you so much for the kind words, Josh!

@Angelswrld203 4 жыл бұрын

What if this doesn’t work and even fuel injector is changed

@bbgirljane2538 2 жыл бұрын

Hi, I got the 6th coil and spark plug fixed and it still pops up. When I clear the code, it runs fine and doesn’t lose power.

@ericmorales2535 2 жыл бұрын

What kind of car did you perform this on

@robk.9862 4 жыл бұрын

Your spark plug is upside down in your graphic. Just FYI.

@leonjones1991 2 жыл бұрын

"Don't have any friends " Damn I felt that 😪

@williamappelhans2919 2 жыл бұрын

Real Friends, the older you get , it seems they go away in so many different ways

@DTUFINOPhotography 2 жыл бұрын

I just recently changed my ignition coils 2 weeks ago and out of the blue today i got a P0306... i will change that spark plug. those were changed in January as well.

@TonyP0425 Жыл бұрын

What was the problem after? I had the same problem I replaced ignition coil and spark plug

@abdullahcheema7061 Жыл бұрын

@@TonyP0425 i have the same issue

@JedRom 4 жыл бұрын

Coils are usually from 60 to 260 depending on the vehicle. Mine for my truck was 56.99 for single coil

@Ryan-bd5ot 3 жыл бұрын

I got mine 35/ pop at rock auto. 15 5.3 V8

@Apphus144 6 күн бұрын

Silverado?

@Austinsumner19 4 ай бұрын

My truck will some times trow a cylinder 6 misfire butt it doesn’t seem like it’s actually misfiring

@travislee5986 3 жыл бұрын

after 2 months of nightmare trying 2 fix this code and 100$ in unnecessary parts, finally found that dirt under the coil packs on the metal plate was triggering my misfires. when in doubt switch coil packs and see if the code jumps cylinders.

@travislee5986 3 жыл бұрын

also, get your parts on ebay, much cheaper!

@2015_Rubicnn 5 жыл бұрын

Try just swapping on a pentastar V6. The intake hangs over driver side valve cover.

@txtpqb 3 жыл бұрын

had same issues, this code of cyl. 6 misfire and bank 2 too lean. Engine running running rough and shaking at various speeds on the road, and idle. Mechanic ran the codes and replaced the #6 spark plug and coil. Runs perfectly now and power restored. I wouldn't think one cylinder misfiring on a V-8 would shake the engine like that. Oh well, problem solved.

@1422dantheman 2 жыл бұрын

What kind of truck do you own ?

@lilstuart1584 2 жыл бұрын

literally have the same problem right now, changed both spark plugs and coil but still have the issue pls help someone help idk wtf im gonna do on my 5.7 hemi

@matth9359 2 жыл бұрын

@@lilstuart1584 bring for a real diagnosis?

@caesarsantiago4994 Жыл бұрын

@@lilstuart1584 did u ever find the problem?

@ramboafghan8656 11 ай бұрын

I got 2000 gmc sierra v6 with po306 code and check engine light is on and flashes regularly. Changed plugs, wires, distributor with cap and rotor, cleaned the MAF, replaced pcv valve, and poured Seafoam in my gas tank. Cleared the truck's computer for an hour and still getting the code. I guess next step is taking it to go get a compression test. If compression is good, then maybe replace the fuel injectors.

@richardthenryvideos 4 жыл бұрын

I just bought a coil at Oreilley for 40 bucks. Unsure why his price was so darn high

@axidhaus Жыл бұрын

Rent

@DanielHamilton382 4 жыл бұрын

Warped cylinder's or oblong cyliners can also cause this code #McCuistonAutomotive #AvingerTx

@renedenet8995 4 жыл бұрын

How do you clear the codes

@richardmendez5333 Жыл бұрын

Disconnect neg. Battery line

@johnbrooks6257 3 жыл бұрын

The Mopar coil packs for my 2017 grand cherokee costed me $600. Thats not counting the NGK's.

@Wesley-vy3hy 4 жыл бұрын

Ha in-line 6 all the coils are in one piece gotta replace the whole thing

@josh19128 4 жыл бұрын

I have a P306 code also on my Audi Q7 4.2. I replaced all spark plugs and coils and cleared the engine light. The code came back on for the same cylinder 6 misfire after putting about 55 miles on it. It would actually be the second time I’ve replaced the spark and coil on cylinder #6, thinking that the parts may have been defective. PLEASE HELP!!!!

@dr.jonchatman1443 4 жыл бұрын

Injectors now. Or vaccuum leak

@omargurrero 4 жыл бұрын

Have you fixed your Audi yet? I did the same and the check engine came back on. Gonna check for air leaks and fuel injectors now

@djpoland5518 2 жыл бұрын

What car do u have?

@howardbeach8701 Жыл бұрын

UGH!!! Been dealing with cylinder 6 issues for more than 6 months! I HATE JEEP! And I HATE Jeep dealerships! I have a new coil pack, new plugs, wires, and catalytic converter. Turned out, my #6 and #4 misfire codes was not fixed by replacing my Coil Pack, Spark Plugs, and Wires. Took it back to my mechanics several times. Weren't able to fix the problem. Jeep told me a couple of months ago it was my catalytic converter. My mechanics also told me that. I replaced the cat. Took it to Jeep in State College, Pennsylvania (I live in Chicago) recently, after it didn't want to start, after driving 11 hrs. Hmm. One of the worst Jeep dealerships in the US. 🤬They said one of my sparkplug wires was "loose". Took it in for in-depth diagnostic. Said my coil, plugs, wires, air intake, and everything on that long list of possible issues in the 6 & 4, passed - except they "thought" it "may" be the Fuel Injectors. I'm out of ideas, options, and $$$$. This is one of the 2 worst vehicles I've ever owned. Since day-one when I bought it brand new! It's been in the shop constantly! Can't buy another car at this time. At one time, I even complained to a notorious mob boss about Jeep, whose CEO lived about 12 minutes away from the Don. Shortly afterward, Sergio Marchionne died of "unknown causes" supposedly. But my worthless $54k Rubicon is still worthless.

@beaviskornholio2754 Жыл бұрын

Have you tried pine hollow auto. They are located in state college also

@TroyStevensStelzerPaintingInc 10 ай бұрын

I can't imagine replacing the plugs, wires & coils but not replacing the fuel injectors for #4 & #6, or at least testing them. Replacing the cat? They were just being nasty there.

@sideways8films488 5 жыл бұрын

Just got this code on my truck that had 32k miles on it. Would this be covered usually on factory warranty?

@beaviskornholio2754 Жыл бұрын

If it's less than 3 years then it's covered

@4evervigilant8 2 жыл бұрын

Awesome. My bully found the code

@jasondecluebass1012 2 ай бұрын

Can you drive it.

@jamesreed450 3 жыл бұрын

What if it more than 1 cylinder I have 3 in my Lincoln ls v6

@jordan3rdcoast307 3 жыл бұрын

Your prices are a little high unless you’re talking factory parts...

@JetBomb-xx6ye 3 жыл бұрын

Looks like that spark plug on that diagram is on the wrong way, but not sure 🤔 lol

@jonathanguzman6751 3 жыл бұрын

Can I still drive the vehicle?

@twi11iams78 3 жыл бұрын

I read not to drive because it can cause major damage to the engine. Here is the link where I read it on. P0306 Code: How To Fix Cylinder 6 Misfire Detected Problem obd2pros.com/dtc-codes/p0306/

@RucciTx 9 ай бұрын

I used 89 full grade gas in my Honda that only requires 87, my car runs way better but I believe it’s triggering the air fuel mixture

@TheNYgolfer 3 жыл бұрын

I think you have the prices for parts and the prices for labor backwards.lol

@vendetta1306 2 жыл бұрын

I have a common rail Cummins, rip

@scarface11385 5 жыл бұрын

I have the p0306 so that means I should just change only the number 6

@scarface11385 5 жыл бұрын

? Should I change it all in cylinder 6 , coil , spark , and injector

@Avalanchefannumbaone 4 жыл бұрын

Pull the plugs first, if they don't look good replace them all(unless your going the cheap route then just replace the #6 plug) and go from there. If it is still misfires then try swapping the coils like in this video (If the misfire moves to the cylinder you swapped the coil from you know that you have a bad coil and need to replace that coil. you dont have to replace them all but its not a bad idea.)and if it still misfires in the same cylinder after that swap a plug wire and replace the injector. If none of that fixes it (or moves the misfire) then you have an internal problem (Valves, Lifters, ETC.)

@Marius696969 4 жыл бұрын

Doesn't work on all vehicles. I can't switch my coil pack around because it's a bar. I've got an inline straight 6, all 6 spark plugs are in one side and my coil pack is a bar that runs across them. That being said though I replaced my coil pack and plugs and im still having problems so I think I know what it is.

@anthonyaguirre837 2 жыл бұрын

Did you ever find out what it was

@Marius696969 2 жыл бұрын

@@anthonyaguirre837 nope. Never figured it out. Replaced the coil pack, replaced the fuel injectors, replaced the spark plugs, even added a heat shield. Nothing worked. Ended up having to get rid of the vehicle and bought a newer truck.

@bsalbergable 3 ай бұрын

Where do you get your "parts alone" prices? 😂

@motorcitywestauto4674 2 жыл бұрын

Depends on if your keeping or selling. I got a set of 6 coils for a 3.6 for $85 with plugs. I wouldn't buy that cheap crap if I was keeping it, but as long as it runs good during the test drive.....

@bigboss-tl2xr Жыл бұрын

That's the kind of crap that a TOTALLY UNTRUSTWORTHY person would do. Good thing I won't be buying anything from YOU!

@FranciscoQ777 4 жыл бұрын

Well made funny

@josephrhoades5142 5 ай бұрын

remember the mechanic saying he thought you might have a leak in hose

@jesuachavez4520 3 жыл бұрын

en espanol carajo

@thedbcooperforum Жыл бұрын

Pssible simple fix is what the tittle should say..

@csixtythree Жыл бұрын

worst case scenario ?

@jessymode 3 жыл бұрын

isnt the car smart enough to tell you exactly what the issue is with a really good code reader?

@dingaonhockey 2 жыл бұрын

My E150 van is dumb as shit. Miracle it holds together on the highway

@paxcrunner 11 ай бұрын

Thank you for this. So many other crappy videos

@dantestellato7300 2 жыл бұрын

bruh fr forgot compression

@NuclearBullet16 6 ай бұрын

Error code 404

@michaelbauer8283 3 жыл бұрын

What kind of bullshit is this lol

@bradoliver9475 3 жыл бұрын

Over explain much?

@tacvborebel777 4 жыл бұрын

Too much time explaining unnecessary shit. Get to the point

@boddenproduction8773 3 жыл бұрын

too many bad tips

@matth9359 Ай бұрын

Fixd tool is garbage from a snake oil company. Topdon top scan is $45 and does way more.