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P0300 Diagnostic Trouble Code Discussion for January 2017

Multiple Misfire Detected *

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Trouble Ticket Help Requests for DTC P0300

	Help Request	Posted
	2005 BMW 545i 4.4L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: WBANB335X5 P0300: Multiple cylinder misfire. Thanks in advance. I have a 2005 BMW 545I in the shop and need some help. For the first 45 seconds this car will start up and run fine. After that it will start to idle a little rough. If you try to drive under medium excel you can feel the misfire. If you bab...	January 03, 2017
	2009 Honda Pilot EX 3.5L Misfire VIN: 5FNYF48499 P0300: random miss. I,m getting these missfire codes for cylinders 4,5,6. Adusted valves. map sensor voltage .94 to .96 warm.Checked timing belt twice. 19 in vacuum hot.Tried swapping coils and injectors.Cannot see a missfire on the scan tool only history missfires.Checked for in...	January 03, 2017
	2004 Kia Sorento EX 3.5L Misfire, MIL Lamp on VIN: KNDJD73344 P0300: Multiple Misfire Detected. cruising between 60 and 70 itll start misfiring on a cruise.if i accellerateor decel itll come right out of the miss,when it misses short term fuel trims both banks go insteantly to 0 and o2 sensors both banks also 0 out, timing belt was done a couple months a...	January 03, 2017
	2006 Saab 9-3 2.0T 2.0L Poor Idle Quality, Surge, Misfire VIN: YS3FD49Y76 P0300: Random misfire. Hello everyone, I have a Saab presented with rough, surging idling and random misfire code. I installed the correct plugs as a precaution after reading several posts. The car has the original Saab coils. This car runs extremely rich. The short term fuel tr...	January 06, 2017
	2009 Kia Sedona LX 3.8L Misfire VIN: KNDMB23369 P0300: Random miss fire. I'm in need of guidance on this,my experience with Kia is limited. Customer brings van into shop with check engine light on and code poo22 stored. (Cam over retarded bank two) Checked history codes,that's where I found the poo18 and Po300. There is know miss f...	January 07, 2017
	2002 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEK13T12 P0300: Multiple Cylinder Misfire Detected. ... idle (at a light/stop sign) after highway driving when ck light comes on p0300. It doesn't happen all the time. I drove it for forty miles nothing, drove it again happened after about 15 miles of highway, light came on flashing got off highway at low rpms ...	January 09, 2017
	2006 Cadillac STS 3.6L Misfire VIN: 1G6DW67706 P0300: Engine Misfire Detected. Misfires at above 4500 rpm on bank 2 hard accel until shift point. Changed plugs/coils/plenum gasket. Cat not plugged. O2 sensors swapped. Intake cleaning and oil flushed. B1 stft on accel goes positive b2 stft goes solid negative 20. Exhaust and intake cams a...	January 10, 2017
	2005 Acura MDX Touring 3.5L No Start, Misfire VIN: 2HNYD18815 P0300: Random Misfire Detected. Hello Acura/honda techs: I have this MDX, 2005 , came in on the hook , no start.Read DTC memomry and two misfires, cyl 4 and 5. Upon inspection found cyl 5 coil blown and shattered out with spark plug. Cyl 4 plug was loose. I checked the threads in no.5 cyl an...	January 11, 2017
	2008 Chevrolet Silverado 2500 HD WT 6.0L Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GCHK29K38 P0300: random misfire. Customer complaint is intermittent loss of power,pinging and flashing check engine light.Test drove it with scanner and fuel pressure gauge hooked up.It feels like it is lean or the exhaust is restricted.Fuel trim numbers are around 0 and fuel pressure stays a...	January 12, 2017
	2002 Chevrolet Avalanche 1500 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEK13T12 P0300: Multiple Cylinder Misfire Detected. ... idle (at a light/stop sign) after highway driving when ck light comes on p0300. It doesn't happen all the time. I drove it for forty miles nothing, drove it again happened after about 15 miles of highway, light came on flashing got off highway at low rpms ...	January 13, 2017
	2006 Volkswagen Jetta 2.5 2.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3VWRF31K06 P0300: Random misfire. Hey everyone thanks in advance for the help. This Jetta originally came in because the customer said another shop recommended a timing chain. We confirmed the stretched chain and replace the chain, guides and tensioner. But this did not fix the misfire. We sta...	January 13, 2017
	2007 Volkswagen Passat Value Edition 2.0L Poor Idle Quality, Surge VIN: WVWLK73C87 Hello IATN members. I have here a 07 Passat 2.0T FSI. This is the engine with a timing belt, just so there is no confusion. Came in with the listed codes and surging at idle. I blocked off the vacuum port to the PCV assembly on the valve cover, and engine ran ...	January 14, 2017
	2009 Kia Sedona LX 3.8L Misfire VIN: KNDMB23369 P0300: Random miss fire. I'm in need of guidance on this,my experience with Kia is limited. Customer brings van into shop with check engine light on and code poo22 stored. (Cam over retarded bank two) Checked history codes,that's where I found the poo18 and Po300. There is know miss f...	January 16, 2017
	2005 Cadillac SRX 4.6L Misfire VIN: 1GYEE63AX5 P0300: Engine Misfire Detected. Believed to have a cmp actuator issue, it misses at idle sets bnk 1 actuator and bnk 1 cmp ckp correlation codes, scoped all 4 cmp sensors and the exh line up but the intake do not. In cylinder pressure transducer showed bnk 1 had 25 more psi running compressi...	January 20, 2017
	2007 Chrysler Town & Country Touring 3.8L MIL Lamp on VIN: 2A4GP54L37 P0300: Multiple Cylinder Misfire Detected. High everyone, Hope someone can clear something up. Is the heater % on the B1S2 O2 sensor supposed to fall off after start up? After replacing the PCM the codes have not returned as of yet. The monitors have run and passed But I don't know if this is normal.	January 20, 2017
	2011 Chevrolet Aveo5 LT 1.6L Hesitation, Misfire, MIL Lamp on VIN: KL1TD6DEXB P0300: Missfires count up the most on cyl 3. Vehicle just came back with CEL on and flashing sometimes during missfire. I have had some difficulty figuring out what I have been dealing with. Neither Alldata or MOD 5 show the internal circuits in the ignition cassette. What is shown are the connections ...	January 23, 2017
	2009 Audi A4 Quattro 2.0L Misfire VIN: WAUGF78K39 P0300: has multiple misfire codes. cleared misfire codes had misfire codes on all 4 cyc. at some point.. need to know how to reset misfire counters so we can pinpoint which cyc is still causing a slight misfire at times	January 24, 2017
	1997 Pontiac Grand Am SE 2.4L No Start, Misfire VIN: 1G2NE52T4V P0300: Multiple Cylinder Misfire Detected. Engine rotates but will not start. Will sputter a little during start and sometimes will backfire but not start. Engine had sounded like it was missing on 1 cylinder and now will not start at all. TEST RESULTS MECHANICAL - Cylinder compression: 1 - 155 psi;...	January 25, 2017
	2006 Chevrolet Express 2500 4.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCGG25V36 P0300: Multiple Cylinder Misfire Detected. After engine swap vehicle road tested perfectly with no issues. verified fuel trims had returned to normal. Vehicle came in with same issue a week later, same cylinder for most part (cyl 7 almost constant dead miss). Sometimes misfire on counter increments on ...	January 30, 2017
	2004 Chevrolet Aveo LS 1.6L MIL Lamp on VIN: KL1TJ52684 P0300: Engine Misfire Detected. Hey guys need a little help here . This is my wife's car she blew it up. I installed a used engine replaced the water pump and timing belt ,spark plugs etc , it runs great only problem is the check engine light keeps flashing once you hit around 20 mph, its no...	January 31, 2017
	2012 Chevrolet Equinox LT 2.4L Surge, Misfire, MIL Lamp on VIN: 2GNFLEEK0C P0300: Engine Misfire Detected Symptom 00. The history is the vehicle came to us not running believed the chain was broken, quick diagnostics found the cam chain was loose and the valves had been bent. We replaced the head with a remanufactured head, replaced both timing chains guides and tensioners, w...	January 31, 2017