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.
View 2 RepliesMy 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.
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))...
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.
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?
A few days ago my "Check VSC" warning came on along with the check engine and traction lights being on. I left my car in a parking garage for a week when I was on vacation and the lights came on once I started the car after getting back from my trip.
I have had the "Check VSC" warning before and I fixed it by replacing my gas cap. My gas cap seems fine this time around so I got my codes scanned and the only one that came up was P0300. Having this issue with the 2007 Lexus GS 350? I still feel like it's my gas cap because I bought a cheap replacement last time around.
I have been a check engine light on and off for the past few months. I finally got the codes read and I have P2015, Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance Bank 1, and P0303 Cylinder 3 misfire.
The car had 80,000 miles, APR intake, Downpipe, Exhaust, and tune. When I had this work done I had engine problems and replaced the spark plugs and Upgraded Coil packs from the R8. Two years later and I get these error codes.
My wife's 2010 RX350 with 75K miles on it , the check Engine Light came up with code P0303 (cylinder misfire). Since the warranty is out already so I went to my mechanic and had the spark plugs and the back ignition coils replaced. After a week, the light came back on. So I went to the dealership and they said the engine needs to be taken apart because of low compression and valves could have carbon build up already.
View 11 RepliesI own the 2014 Santa fe turbo 2.0 litre limited which has 4000 km on it. Within 210 km the engine light came on 3 times. I took it into the shop and they ran a code of P0303 which is a misfire, they changed the coils #2 and #3 and cleared the code. The second time it showed the same code but the shop said it was in the history so that is why the same code came up again. They ran an update ECM? and all was good. Now the 3rd time they tell me no code has come up and can't do anything about the engine (they cleared it) but it was like chasing ghosts. My vehicle runs great so not sure why I am constantly having this issue.
View 68 RepliesRecently my check engine light came on on my 98 Cadillac Deville. I went to Autozone and got a free engine diagnostic and was given a printout of a bunch of stuff I did not understand, the technician told me it was just an issue with the light, and it could be fixed with unhooking the black end of my battery for 10m. Just a little bit ago, i popped the hood, and touched the black end of the battery to see how i could unplug it. When i touched it I heard a click and now there is no power to my car. Every time i jiggle the negative end I hear a click from the right side of the engine and nothing happens. I did not even unhook the battery.
View 1 RepliesThe car was misfiring and the check engine light codes were all sensor coils were bad. Lexus told me that it was coil6 bad and they fixed it. I should have had no problems, I got a whole 2 miles and I misfired and engine light back on. I drove for a while and light went off and then misfired again. Before I bring it back in I was looking for some insight. I can't understand how it wasn't fixed right the first time but I don't want to go back and get a few thousand bill either. Could fixing one coil cause another to go bad.
View 1 RepliesI have a 2005 Prius with 131k miles. The check engine light came on. I had my mechanic check for codes, he had 3different scanners. There were no codes posted. Next day light went off. It has been off for a week. Now it has returned.
View 5 RepliesI have a 2008 Prius that I purchased used last year. It has just shy of 139,000 miles on it. Recently the check engine light came on, and I dropped by AutoZone to have them pull the codes. They are as follows:
C1241
P1121
P3193
I haven't been able to find a full explanation of the codes online, so I need to know what they mean, how much it would cost to fix, and how urgent the repair is. I will be going on a 5 1/2 hour road trip next week, so I want to make sure I'm not going to break my car (or myself!) by doing so with the engine light on.
My check engine light comes on intermittently, fuel consumption normal. I have not had any noticeable performance issues. I took it to O'Rielly's for a scan but they could not establish a connection to get a readout. Is there a special scan tool needed? The on board Lan Monitor shows EMV codes below, are they meaningful in any way?
Code Sub-code
01-DC 190-38-5
01-D5 190-52-F
01-D8 190-35-1
01-DB 190-11-F
01-DB 110-21-2
Just last week I bought a 2007 prius from a local dealership in Houston. The check engine light recently turned on and had it checked out by an auto parts store. The codes they read were the p1116 and p1121 (issues with the coolant valve). I know it would cost much to replace the valve, and I am not wanting to pay that much, especially since i just bought the car. I'd also be willing to fix it myself if i had some guide or step by step instructions...
View 3 RepliesCheck 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?
View 5 RepliesMystery issue with my 2001 Accent GSI (5-speed manual, 1.6 L). I'm getting a P0300 error code and the Check Engine light (the light is like an old friend, I miss it when it's not on). This happened four months ago and I replaced the ignition coil - seemed to fix things - but now the light and the error is back with a vengeance. Car stumbles and runs rough. Changed the plugs and plug wires, but no difference.
BTW, there's a small pin hole in the upper part of the gas tank (just enough to give it a gassy smell when the tank is full) but I don't think the hole would be big enough at this stage to cause the check engine light to come on in the same way it does if you leave the gas cap off or loose.
I know it is a random cylinder misfire code however I started my car in the morning and it was fine I moved it and put it back in my driveway. I started it up later and waited for it to heat up i came back outside 10 min later and my check engine light was flashing and my car was shaking like crazy you could tell the engine was misfiring like crazy. I had under a quarter of a tank but not empty yet. I shut it off and turned it back on and it was still doing it. I drove the mile to the gas station the way it was.
Under partial throttle it was revving to 4500 and over 5, had to let of throttle to make the car shift up a gear. I filled up and started the car again performed fine after that however the check engine light was solid now and still on. I went to my local mechanic and he read that code P0300. I changed my spark plugs that day and they were crap the original spark plugs I have 65,xxx on my car now. Car is smooth now. I cleared check engine when i saw him first and it did not come back on all day even before i changed the spark plugs later that night. Why my light was flashing and why my car was acting like that till i filled up?
1995 Cadillac DeVille 4.9 L Check engine soon light comes on, battery voltage high. When I increase speed the head lamps get brighter when I decrease speed the head lamps get dimmer. I changed the alternator because that's what a mechanic said I needed but I still have the problen battery voltage high. Will this damage the battery or other components? Should I stop driving the car.
View 5 RepliesI got a 1986 Camaro 5 speed 350 4 barrel carb and the check engine light flashes on and off, when it comes on the engine idles really low and when it goes off it runs normal. I've changed the ignition control module twice already because it wouldn't start. i change the ignition coil because thought that was messing the module up. I hooked a obd ll and 1scanner too the car but wouldn't respond.
View 14 RepliesWhile I am driving the car it will start to die and skip. Happens randomly. Today I was driving up a small hill and it went quits on me started lurching with check engine light coming on and off. The car will turn over and start, but only for a few seconds before dying again.
Seems to happen when the car is running for a while. Also the ABS light flashes on then off randomly while driving sometimes although It hasn't been an issue. Will be checking tomorrow to see if it starts.