Accent MC (2006-11) :: 2007 - Misfiring Codes P0300 And P0302
Dec 9, 2015
My girlfriends 2007 accent as thrown codes p0300 and p0302.
After reading everything I could find, I had coil pack on my list of possible problem items.
The car sat in the driveway yesterday and when she went to start it today, she couldn't get it to.
I got it to start when I got home by giving it some gas while turning the key, but I don't want to drive it anywhere.
The hard start is leading me to believe it's the coil pack.
I was going to start with changing the pcv, spark plugs, and run fuel injector cleaner through it because those are the cheap possibilities...but now may add in a new coil pack.
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i have a 01 passat with a v6 in it on 4 motion and im having an issue with soem mis-firing
i pulled the codes. P0300 P0301 P0302 and P0303 which are all saying that there are missfires in cylander 1,2 and 3 and random miss fires.
im also getting a P0340 which is cam sensor A or the right hand bank. problem is i just replaced the cam sensor and when the motor got warm, the code came back. I was told by the previous owner that the car needed a Coolant Temp Sensor....can this be the cause of my mis-fire issue? hear me out.... it only happens when the car is warm so im thinking that the car is warm but the ecu thinks its cold cause its not getting a good signal from the CTS. thus its either advancing the timing as if the motor is cold and cuasing a miss fire or something along those lines. any thoughts?
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I have a 2011 GTI (purchased new in 2010) with a stage 1 APR tune and a carbonio stage 1 intake. 71K miles on the car, tune has been on it from nearly the beginning, no issues. I have religiously filled with 93 octane gas -- like, always. The other day I was filling up an empty tank in NJ -- land of mandatory attendants -- and I accidentally said "premium" instead of "super." (I normally self-serve in PA). Before I realized what had happened, I had a full tank of 91 in the car.
I run the 93 octane program on my APR, and I couldn't remember how to switch, so I've been running around the last few days that way, seemingly with no issues. I'm not even sure what's supposed to happen if you burn 91 while in the 93 program.
Anyway, yesterday I happened to go full-throttle in 1st or 2nd gear, and I ran into a little stumble. Strange, but I figured maybe this was the result of my refueling mistake. So, I got out my APR manual and figured out how to switch programs down to the 91 program, which I then did. Took the car out again, and was still able to get it to stumble, eventually with a blinking, then solid CEL. A quick VCDS check showed a "Random/Multiple Cylinder Misfire Detected" -- P0300 and "Cylinder 2 Misfire Detected - MIL" -- P0302.
Now at 71K miles, I've never replaced the coils or the plugs, although I have had 2 intake manifolds replaced under warranty. I'm kind of figuring the octane and tune are not really causing this and it's probably just in need of some coils/plugs. what is "supposed" to happen if you run 91 octane on the 93 program? I haven't tired backing down to stock yet, but I could certainly do that and see what happens.
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The car doesn't seem to run that rough.
Replaced coil pack and spark plug wires with parts from O'reilly auto
16684 - Random/multiple cylinder misfire detected
P0300 - 35 -10 - Intermittent
16686 - Cylinder 2
P0302 - 35 - 10 - misfire detected - intermittent
16687 - Cylinder 3
P0303 - 35 - 10 - misfire detected - intermittent
I have searched and browsed multiple websites and threads to no avail. They all seem to be dead ends.
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I have a 2010 model Hyundai Accent showing error codes P0301, P0302. It has a 1.6L engine. I know little about cars, what is going on and how to fix it.
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I have a 2000 Toyota Avalon XLS with 134k miles, engine is a v6 (3.0). It has a rough idle and a steady misfire. You can drive it sometimes and it will run perfect and you can drive it sometimes and it will misfire. I am getting codes P1150, P0300,P0302, P0304,P0306. Driving me nuts.
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My car is misfiring, codes p0171 and p0300 come up on the code reader. It idles rough and has very little power. I have checked my exhaust , it is not plugged. When I unplug coil #2 while idling there is no change as to the engine performance so I switched the coils around with no difference when coil is unplugged on cylinder #2. I have changed the plugs, there is power to the coil, all plugs are firing and when removed plugs 2 and 3 are wet with fuel indicating I am getting fuel and fire. I have replaced the cam sensor with no change.
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I have a 2007 Hyundai Accent GLS. I just got it from a used car dealership (local) and it runs perfectly. It had a misfire code when i first got it, for all cylinders plus the p0300. It went away when i started the engine again, and didnt come back til a month later (Now). now it wont go away.
I went to advance auto and had them use their OBD2 reader for a trouble code and i got p0300, p0301, p0303, p0304. No other codes present.
I am not feeling anything bad, and from what I am told, a misfire feels like a hard shift. This is of course after getting the plugs and wires changes as well as an oil change. Standard preventative maintenance.
The mechanic used OEM parts got from local parts shop. i think the OEM plugs are the copper ones. I would have preferred iridium as they arent that much more expensive but I don't want to pay for another plug change.
The only symptoms I can think of, is that according to google, I should get around 380 miles to a full tank (11.9 capacity, 32 mpg city). I am only getting 280 from full tank to gas light.
I have also gone through a lot of oil. I checked the dipstick and it was below the low line, so i bought a quart of high mileage oil (same exact brand and type of oil that i gave to the mechanic to use) and it went to just above the full line. This was at around 1500 miles after oil change.
After visiting multiple sites about misfires, i found a few things that caught my attention. One is a site called auto service professional, which talks about the OCV for the MC accent. A lot of sites also recommend gaping the plugs at .035.
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This has been an ongoing issue with our 2006. We purchased the car about a year ago and have put on just over 8,000 miles. Rebuilt the battery pack and replaced the 12v battery. This is my wife's car and I have a 2005, so I have done some diagnostics, tuneup, and even swapped some parts between the two cars trying to narrow down the issues.
Only recently have codes been recorded. The car is has a noticeable misfire at low RPM. Here is what has happened up until now:
11/29/15 - replaced spark plugs - #1 was fouled so I swapped coils between cylinders 1 and 4
2/25/16 - replaced 12v battery with new battery
4/1/16 - P0300, P0301 codes were first recorded and reset to see if they came back
4/10/16 - swapped Integration Relay with my 2005 (part # 82641-47010). My 2005 ran poorly after the swap, so I put a used one in my 2005.
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I'm lost. Got P0171 and P0302 ... 2006 4.2 V6 5-speed 220K ... Got bad miss ...
Compression check was good.
Replaced plugs.
Replaced wires.
Replaced coil pack.
Cleaned MAF
Miss remains. What do I do next?
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I have a 2001 Passat 1.8 Turbo engine trim is AUG. My car is acting funny since yesterday. When i start my car it idles rough and CEL start flashing but as soon as i drive at like 10-15 MPH speed it becomes smooth and CEL stops blinking. I took my car to autozone and have it scanned got P0340 P0300 P0301 and P0302. It means random misfire and misfire in cylinder 1 and 2. I am not getting the misfire code for cylinder 3AND 4.
I swap coil boot 1,2 with 3 and 4. But misfire didn't move with cylinder. So i waited whole night reset CEL and swap coil 1 with 4 and 2 with 3. Have i scanned again not i am getting P0300 = random misfire and P0302 = misfire in cylinder 2. I didn't get P0301 this time.
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Kia rio 2006 130461 today I went and got gas right when I pulled out light began to flash and car shaking went to auto zone codes p0302 and p0326. I had knock senor changed 2 months ago . What could be the problem the guy said I just need a tune up . Is this true ? Is my car safe to drive car not shaking now and no changes in function of my car. There no way I can any one to look at it for couple begin tomorrow sunday.
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I recently got a problem with my 2006 LX V6 with 65k mils on it. The car had a few times a rough Idle so I hooked up my OBDII scammer ant got two failure codes:
P0300 miss fire
P0276 problem with Injector #6
Which one is the cylinder #6. I took of the engine cover and checked the connectors to the valves in the front row. I assume cylinder number 6 is in the back row and hard to get access.
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2009 Accent, 1.6L 154,xxx Cylinder two misfire. Engine was rebuilt due to timing belt. Twice. Second time I did it. Replaced plugs, coil packs, all gaskets, (everything new in the head) did a smoke test, compression test 180 psi across all four, used a noid light for coil packs (good) did it at the injectors 1,3,4 did good, but 2 came on then went off. Check resistance and it shows good, replaced injector anyway and the connecter. Still doesn't work. Checked powers and grounds at the rail, good. Good solid voltage. I hooked up a scan tool and tried to shut injector 2 off, no change in RPM or vibration. Scan tool worked for 1,3,4. Used another PCM, still misfire in two. Even jumped a wire from PCM control and 15A inj fuse for the 12V constant (bypassed the harness) and still doesn't work. Also have knock sensor code, just two codes.
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My 07 3.3 SF is throwing P0154 and P0300 codes. Autozone said the P0154 is Bank 2 pre-cat O2 sensor. But exactly which one? The P0300 is random misfire. Could they be related?
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I have a 2010 accent GL manual sedan. It has 104,962 KM on it, the warranty expired December 18, 2015. Since February this car has become a frustrating money pit. Being in the dealership constantly for repairs, then within a week something else 'happens' and back it goes. Spent almost $5000 in 4 months on repairs. Decided that's enough and will do majority of repairs myself.
Yesterday while drive on the highway I had a sudden loss of power and a check engine light came on. My scanner which has become a standard item in my glove box indicated a misfire on cylinder 2 - P0302. I limped the car home, in 3rd gear I was having a hard time staying above 2000rpm at 60km/h. at lights I had to use hand brake so I could keep my foot on accelerator, revs were dropping below 300.
Today I replaced all the plugs (all 4 were still in good or better condition, #2 showed signs of a slightly rich burn and #3 a slightly lean burn), replaced all coil boots (no cracks, no burns, and still pliable), removed and cleaned all the injectors. Error code P0302 persists.
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Check engine light came on. Codes are P0300, P0302, P0304. Plugs were previously changed. Plugs look good. Changed both coils. Light still one. Injectors also previously cleaned. What else should we check for? Valves hanging? Anything else to check for?
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So I bought my accent used a couple months ago. It is a 2007 SE 3dr 5spd manual. It ran nice during my test drive and the price was right so I bought it.
Now I'm wondering if there is any way to find out the service history on the car...at least the major one's (30k, 60k)?
I ask because recently the engine was idling a little rough and it threw a P0302 code so I changed the spark plugs and holy-cruddy-deposits-batman those things were black. Gapped the new ones and popped them in and its a noticeable difference. My CEL keeps coming on and throwing a P0496 code as well, virtually once every tank of gas. Its not the gas cap so my next step there is to check the PCSV and hoses.
With these little problems, it makes me wonder about any larger issues. I know the timing belt on these things is supposed to be replaced at 60k. Additionally I would be willing to bet that my ECM software is out of date. Would Hyundai have records for any of the big maintenance milestones since they are required for warranty work?
How much does it cost to have a dealer check your ECM software and update it if needed?
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Had the CEL come on twice in the last few days. The first time, a restart of the car took it away. The second time, it came on and stayed over multiple start ups.
With Torque Pro and a bluetooth OBDII dongle I read: P0300 - Powertrain, Random/Multiple Cylinder Misfire Detected
From the Internet:
Possible causes
- Faulty spark plug (s)
- Faulty ignition coil (s)
- Clogged or faulty fuel injector (s)
- Intake air leak
- Fuel injectors harness is open or shorted
- Fuel Injectors circuit poor electrical connection
- Ignition coils harness is open or shorted
- Ignition coils circuit poor electrical connection
- Insufficient cylinders compression
- Incorrect fuel pressure
I wish it wasn't so broad... But, as the car is about to hit 60,000 miles, I plan to replace the spark plugs (NGK), engine air filter, cabin air filter. Just had the timing belt done last week. I will check all of the intake couplings for tightness.
For others who use Torque, what other settings could be useful in pinning down this issue for me? I cleared the CEL this morning; it didn't come back yet.
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I got a 1997 sonoma which has a p0300 code. I changed the plugs and wires, cap and rotor and the pcv value, and it still misses. what could this be?
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Went to do a few things this morning, started the car and it ran like crap. It was an obvious multi cylinder misfire. I checked to make sure all the coil connections and all other visible connectors were tight. Went back around and noticed the mil was flashing, so I shut it down and took the girl's car. I returned later in the afternoon and swapped out my intake in anticipation of it going to the dealer. Started up the car afterward and it ran fine without the mil lit. I had the codes pulled:
p0300 p0303 p0306 Its kind of weird that 2 coils would go at the same time. Do these cylinders share a coil or fuel injector driver off the ecm?
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