Passat (B5) :: 2001 - Misfiring - Got Codes P0300 / P0301 / P0302 / P0303?
Oct 7, 2008
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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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 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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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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2002 Passat 1.8T
Backstory. The P0411 code shes had for quite some time. I think probably 4 years maybe. Just never did anything about it because I guess they are expensive to fix. Thats the SAIP and combi valve correct? Anyway to remove all the emissions stuff and get the codes deleted?
So, about 3 weeks ago, maybe a little longer i cleaned her engine bay, replaced a few vacuum lines because the shop she took it to last year did a terrible job. Mind you, they did a head gasket, timing belt and some other minor things while they were in there. And they couldn't take the time you run new vacuum lines, since they just cut the originals and used a bunch of t fittings to "solve" the problem.
Anyway, i replaced the lines and it seemed to run better at idle, still had a little mis at idle but ran smooth at speed. I also did an oil change, put some fuel injector cleaner in it, put some seafoam in the oil, and cleaned the engine bay thoroughly. I did it properly and took all the plastics off, cleaned them, scrubbed the bay and used an air hose to get rid of the excess water. Left in a nice state. Ran smoother, looked better, so on and so forth.
Fast forward to last week, and she mentions to me her car isnt running right. Its sputtering, hesitates, running rough, exhaust is puttering, and it used up a lot of gas. She parked it for a few days, and i came down to look at it. Mind you, i don't have a code reader. So I looked at it blindly thinking it had an ignition issue. Nothing could have changed that quick since i looked at it.
So, today we got one coil(just in case ones bad), and 4 new plugs (Autolite Iridiums). Replaced and gaped the plugs to .030, torqued to 23 ft/lbs and started the car. Seemed to run a bit better, but subsided quickly. I then pulled each coil harness plug to make sure it would misfire on each cylinder and it did. So, new plugs and the coils checked out. Time to get its codes read.
Took it to the Pepboys and the codes it came back with were the P0011, P300, P0301-3. Cleared the codes and they came back nearly immediately. I had the dreaded P0011 code. The misfire codes im guessing were from the coils being pulled on each one, and also due to the P0011. Now i read a lot of threads about the P0011 and how its usually not the camshaft position sensor. However, i pulled the plug on that while the car was running and nothing changed. So i thought it could be the CPS. Changed that out and still nothing.....
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This morning I started my car and it was idling a little rough. The the Check Engine light began flashing - I immediately turned off the car and consulted this forum and my father the mechanic. After talking with my Dad and telling him that the car had sat for a week, he thought the issue was probably NOT the catalytic converter and thought it was probably related to the car sitting and possibly getting moisture in the gas. I started the car again (the roughness at idle seemed to have gone away) but the check engine light/malfunction indicator light (MIL) did not flash, it did come back on after a few seconds, but as a solid light . And as we've all read, it's OK to drive with a solid MIL.
I took the car over to Autozone and had the codes checked - P0300 (multiple cylinder miss fire) and P0301 (cylinder 1 misfire). I asked them to clear the codes. I has just put in new NGK spark plugs last month, so I didn't think it would be the plugs. I looked at a new coil pack for one of the cylinders. I decided to see if clearing the codes alone would work and drove home. No issues so far, no MIL, no rough idle, no hesitation (fingers crossed).
When I called the stearleship - they recommended I have the car towed, but would not speculate as to what the flashing MIL could be (catalytic converter or bad coil pack(s))...
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My wife started our '99 Explorer last week and she said that the engine was rattling. I started it up when I got home and it sounded like something had let loose in the engine. We took it a local mechanic and he basically said that the motor was shot. I pulled the codes and it doesn't look good to me but I'm not a mechanic. Codes are:
P0301
P0302
P0303
P0173
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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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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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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 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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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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2000 Ford Ex 5.4 V8 175K miles
Top of radiator (plastic part) had a small crack and started leaking on drivers side. Fixed with JB Weld. Ran fine for a day. Now I have a bad misfire and codes P0301 and P0302 (Cyl 1 and 2). Cleaned MAF and checked Air Filter. All good. Plugs replaced at dealer less than 20K miles ago.
So I took off Cyl 5 (easiest) and found that the boot is fine but the collar on the boot is done for. Can this cause the issue?
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My son just left. We scanned his truck and got these codes.
P0172 Bank 1 rich P0300 random misfires P0303 cylinder 3 misfires.
I used the Torque APP Pro to check these codes. I went to live readings in the Torque APP and saw some readings for Long term and Short term bank 1 Readings.
They are all "greek" to me, and I don't recall what they were, but could get those readings tomorrow.
When I have done searches combining these codes together, I see changing spark plugs. P0172 alone gets me a different train of thought. Mainly CAT issues.
Also, his cranking to start is quite long. (A lot longer than my 6.0L would ever think of cranking) At least nearly 30 seconds of cranking. We are leaning toward first just changing #3 plug.
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My 2004 Cadillac CTS 3.6L started running rough, check engine light flashed on and off. Codes P0300 and P0303. The car has about 119000 miles. Could this just be the plugs? The car has been running fine up to today.
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Just got a 98 f150 w/ 5.4 4x4 excab. It idles fine but under light accleration. It starts bucking and missing bad, if I step on it, it down shifts and accelerates fine. If I try to maintain one speed it misses bad. It is not throwing any codes right now. The check engine light did come on for like a minute but went back off before I could have it read. I hooked up a scanner just to see if any codes were stored and got p0300 and p0301. I am going to clean the MAF and check for vacuum leaks. I hear the rear plug and coils can get water in them causing similar problems.
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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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I would like to find out why my car is misfiring before throwing parts at it. I have a basic level of mechanics and have checked a few things before posting here, which may or may not have ruled out some possibilities.
The problem: I have been consistently getting P0301 and P0304 but only happens sometimes, while other times there is no check engine light. I first checked the ignition coil, right side of it, that controls cylinders 1 and 4. Did resistance test, measured for voltage, and checked the wires for continuity to the connector, with everything coming out good. I know a few must have had issues with the cheap pigtail connector like me so I went and changed that but still got the misfire codes. I then put in an older known to be good working coil but no change.
After that, I removed spark plugs 1 and 4 and put them where 2 and 3 go but still got the same codes P0301 and P0304.
A friend who is a mechanic for Nissan checked the spark and wires, saying they were fine. He then checked the injectors and noticed that injector 1 didn't increase in ticking sound when RPM increased. He said I should replace injectors 1 and 4 to see if that changes anything or switch injectors 1 and 4 with 2 and 3 to see if the codes at least change. I removed them all, got two of them from junkyard just in case, made my own tool where I pumped straight fuel injector cleaner through each of them with pumped air, and put the two from junkyard on cylinders 1 and 4. I still got the same codes so then I switched injectors 1 and 4 with 2 and 3, which didn't change the codes.
I was told by another local mechanic shop that it's definitely the coil but I knew it wasn't.
Other info: I am not sure it would matter when dealing with a misfire but I borrowed a code scanner and saw that the Long Term Fuel Trim was -7%. I researched that and it means that the car is running rich and the computer is being told that it needs to run lean. I am not sure that this would make only two of the cylinders misfire and the freeze data shows that same negative LTFT for when the P0301 happened. I also know that there is an air leak at the gasket where the front cat connects to the flex pipe/rear cat. I have also gotten a rear downstream 02 sensor code once within the past month but it hasn't come back.
Would the LTFT being lean have anything to do with the misfires? Would the gasket between the two cats cause the 02 sensor to get a faulty reading? If so, would the downstream 02 sensor be able to adjust to a lean fuel mix? What else should I check?
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I've been having issues with my beloved 2003 with a little over 130k with warning lights going on and off. I went to O'Reilly's they gave me the codes P3130 and P0303. One of codes states "misfiring on all cylinders," they didn't have a description for the other one.
Dealership won't tell me anything about what the codes mean. The warning lights are an exclamation point inside a triangle, check engine, and what looks like a thermometer in red.
Just got the oil changed a little over a week ago, dealership said they didn't notice any problems. Warning lights came back on last Thursday and just disappeared about an hour ago.
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After changing 3coilpacks on my Passat 04 1.8T soo far finally the last one went out. The codes I got are P0301 (which is misfire cylinder1) and the other code is p0420 which I do not know what it is... I think it might do something with cat or something.
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2009 corolla 1.8l 155,000 miles. Replaced iridium spark plugs at 100,000
I got a CEL few weeks ago, P0301 Toyota - Cylinder 1 Misfire Detected
Car has been running bad for about 2 weeks now, excise noise on the highway, especially up hills.
Yesterday, I took a look, replaced the spark plug in cylinder 1, same results. Checked the coils using one of those flashing tools, all 4 flashed quickly, with no breaks in flashing. put it all back together, cleared the code, went home.
Took it out for a drive today, and it started running way worse. Checked the CEL, and now I have both P0301 and P0303 Misfire on cylinder 1 and 3. Barely made it home, ran VERY VERY bad.
Got home, and made a video of it. It just kept dying. Check it out here. [URL] .....
Also, when it does run, it almost sounds like I can hear excess air, its hard to hear in video, but doesn't sound right. Maybe air leak? How do I check?
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