Join Now
International Automotive Technicians Network

P0301 Diagnostic Trouble Code Discussion for December 2009

Cylinder 1 Misfire Detected


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0301
Help Request Posted
1999 Mercedes-Benz C43 AMG 4.3L Hesitation, Misfire VIN: WDBHA33GXF
P0301: Cyl 1 Misfire. This one is giving us a headache. This vehicle when cold, will fall on its face under medium to wide open throttle and will not rev up. It will start missing when it is hesitating and turn on the check engine light showing misfires on the right bank. Once the ...
December 01, 2009
1996 Pontiac Sunfire SE 2.2L Misfire, MIL Lamp on VIN: 1G2JB1247T
P0301: Cylinder 1 Misfire Detected. missfire on cylinder one all the time customer was driving car two weeks ago and came out of nowere
December 03, 2009
2003 Honda Pilot EX 3.5L Misfire VIN: 2HKYF18453
P0301: Cylinder 1 Misfire Detected. This vehicle has a slight miss at idle only. Has had previous work done at another repair facility to cure this problem. Now it is at our shop and was wondering what direction I should start with to fix this problem. I know these carlines have problems with eg...
December 08, 2009
2001 Lexus IS300 3.0L Misfire VIN: JTHBD18211
P0301: Cylinder 1 Misfire Detected. Hello technicians, I had a customer bring a car to me for a smog check. After the smog check, the engine light failed, but the emission passed. In test 15 mph, the HC MEAS was 0. CO % MEAS was O.00. NO MEAS was 56ppm. In test 25 mph, HC MEAS was 0. CO was 0.00...
December 10, 2009
2006 Lincoln Mark LT 5.4L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 5LTPW16506
P0301: cyl 1 misfire. missfire occures at 1800 rpm , drives poors
December 10, 2009
2005 Ford Taurus SE 3.0L Misfire VIN: 1FAFP53U65
P0301: Cylinder 1 Misfire. ... wrecked and fixed for my mom. I had dropped engine out for repair to main frame rails. I had to replace front head and coil due to accident. Used those parts off a parts car with 73k on it. Vehicle has ran fine for about 20k miles. I replaced the plugs abo...
December 11, 2009
2004 Subaru Impreza WRX STI 2.5L Stall, Misfire, MIL Lamp on VIN: JF1DG70644
P0301: Cylinder 1 Misfire Detected. this car came from subaru and they said it had drilled out injectors(-- thats right.. wow.. what a joke. this thing runs rough and stalls when coming back to an idle, but the intake cam code bothers me. customer says he hasnt had a timing belt done recently. j...
December 11, 2009
2008 BMW 335i 3.0L Poor Idle Quality, Misfire, MIL Lamp on, WHITE SMOKE, COLD VIN: WBAWB73528
P0301: cyl 1 misfire. Customer cals with "serious check engine light and car running rough and smoking". I scan and find all these lean and misfire codes, engine in safe mode(restricted boost I think)retrieve freeze frame data and clear codes. Start car, idles smooth, no sm...
December 12, 2009
2002 Subaru Forester 2.5L Misfire VIN: JF1SF63512
P0301: Cylinder 1 Misfire Detected. This one mifires randomly on every cylinder only at idle, just off idle it goes away. Replaced spark plugs and wires-no change. LT fuel trim is at -24 and upstream O2 stays at 1.5V. Replaced oxygen sensor-no change. Checked for vacuum leaks and found none.
December 14, 2009
2000 Toyota Celica GT 1.8L Poor Idle Quality, Hesitation, Cuts out, Misfire, MIL Lamp on VIN: JTDDR32T5Y
P0301: Cylinder 1 Misfire Detected. Vehicle came in running rough with lack of power. Cleaned MAF sensor and got a little better. Removed battery cables to clean posts and after restarting motor ran terrible. Now has extreme lack of power, feels like retarded timing but timing is at 16 degrees a...
December 14, 2009
1999 Ford Explorer XLT 4.0L Poor Idle Quality, Misfire VIN: 1FMZU34E6X
TRUCK CAME IN ROUGH IDLE AND MILL ON FOUND ALL THE CODES LISTED ABOVE AND ALSO FOUND THE VACUUM LEAK ALSO THE PASSENGER SIDE HEAD HAS LOUD KNOCKING NOISE THOUGHT WAS THE TIMING CHAIN BECAUSE FOUND THAT IT WAS LOOSE. FOUND TSB FOR CHAIN NOISE AND DID THE REPAIR...
December 15, 2009
2005 Ford Taurus SE 3.0L Misfire VIN: 1FAFP53U65
P0301: Cylinder 1 Misfire. ... wrecked and fixed for my mom. I had dropped engine out for repair to main frame rails. I had to replace front head and coil due to accident. Used those parts off a parts car with 73k on it. Vehicle has ran fine for about 20k miles. I replaced the plugs abo...
December 16, 2009
2007 Chevrolet HHR LT 2.2L Misfire VIN: 3GNDA23D77
P0301: Misfire cyl. no 1. ... about 120 miles round trip each day. Light came on agian next day on way to work, P0301 agian. Swapped coils #1 And #4, cleared code. Light came back on agian next day on way to work,P0301 agian. Any suggestions, please. Thanks Dennis
December 17, 2009
2005 Dodge Grand Caravan SE 3.3L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GHCD12342
P0301: Cylinder 1 Misfire Detected. ... engine with salvage yard engine 138000 kms on motor replaced spark plugs at time of engine swap started engine ran for awile engine was running roughand service engine lite was on had o2 sensor code and p0340 cmp code replaced o2 sensor and camshaft positi...
December 17, 2009
1999 Ford Explorer XLT 4.0L Poor Idle Quality, Misfire VIN: 1FMZU34E6X
TRUCK CAME IN ROUGH IDLE AND MILL ON FOUND ALL THE CODES LISTED ABOVE AND ALSO FOUND THE VACUUM LEAK ALSO THE PASSENGER SIDE HEAD HAS LOUD KNOCKING NOISE THOUGHT WAS THE TIMING CHAIN BECAUSE FOUND THAT IT WAS LOOSE. FOUND TSB FOR CHAIN NOISE AND DID THE REPAIR...
December 19, 2009
1996 Toyota T100 SR5 3.4L Misfire, MIL Lamp on VIN: JT4UN24D6T
P0301: Cylinder 1 Misfire Detected. We got a head scratch-er here guys, we have a recurring cylinder #1 misfire - P301. We have checked compression and valve clearance both okay. We replaced the fuel injector, coil, spark plugs, and engine ECU (used) the code keeps returning. We have swapped the...
December 21, 2009
2006 Ford E-350 Super Duty XL 5.4L Misfire, MIL Lamp on VIN: 1FDSE35L96
P0301: Fault Cylinder 1 Misfire Detected. Hello, Have this truck we installed a jasper 1 month ago,Truck has been running great. Truck gets used for a service truck for an oil company so it is getting used alot. I went into archives and found some problems like this but they were harness problems a...
December 22, 2009
1998 Chrysler Sebring JXi 2.5L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 3C3EL55H3W
P0301: Cylinder 1 Misfire Detected. I was given car after Apprentice Tech did a Tuneup ( plugs and wires) to fix a misfire. Car has been here two weeks. I initially checked fuel pressure and found no problem it was when I tested and founf that the coil could not produce enough spark to jump a HE...
December 28, 2009
1999 Subaru Legacy Outback 2.5L Misfire, MIL Lamp on VIN: 4SG126985X
P0301: Cylinder 1 Misfire Detected. replaced timing belt, pump, all seals. upon start up, 1 and 3 on (right bank) not working at all. double checked cam timing, great spark and injector duty cycle is 3-5 milliseconds. car ran fine before timing belt work was performed. HELP! HELP! HELP! 125-130 ...
December 28, 2009
2005 Cadillac CTS 3.6L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6DP56765
P0301: Cylinder 1 Misfire Detected. No experience on this engine.Car was towed in 2 weeks ago and would not start, found almost no oil in engine, changed oil and vehicle started and has been running fine since. Now we have a rough idle, with misfire codes on bank 2 and intake correlation code P0...
December 29, 2009
2002 Ford F-250 Super Duty XLT 5.4L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTNF20L62
P0301: Fault Cylinder 1 Misfire Detected. Hey this truck also has 185 psi compression, injector pulse on cylinder number 1 and coil pulse. smoked intake no dice, the spark plug pulled out was fuel fouled, Data stream. st trim bank 1 % 0.8. st trim bank 2 % 0.2. lt trim bank 2 % -3.9. however why is lt...
December 29, 2009
1998 Toyota T100 3.4L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: JT4TN14D4W
P0301: Cylinder 1 Misfire Detected. Have this truck here for the first time. It looks like someone has put on two new oxygen sensors. It runs smooth for about 5 seconds after you start it. It immediately starts to stumble very badly and then dies. I thought maybe the cat was plugged. I put a pre...
December 29, 2009
2003 Subaru Impreza WRX 2.0L MIL Lamp on VIN: JF1GD29603
P0301: Cylinder 1 Misfire Detected. ... advance for the help. my friend had a check engine light on for a cat. efficiency code. replace cat with and oem cat. two days later mil on with p0301. code was not there befor. says light off in the morning but after 15 min comes on. i have driven it for ...
December 30, 2009