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International Automotive Technicians Network

P0301 Diagnostic Trouble Code Discussion for June 2012

Cylinder 1 Misfire Detected

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Trouble Ticket Help Requests for DTC P0301
Help Request Posted
2008 Honda Fit Sport 1.5L Misfire, MIL Lamp on VIN: JHMGD37678
P0301: multiple misfire cyl1. Last time in we replaced spark plugs with OEM plugs, cleaned dirty throttle plate, replaced very dirty air filter, checked for vacuum leaks etc. cleared codes, did long road test after 2 weeks and several hunded miles mil light came on again with PO300 and PO3...
June 06, 2012
2004 Chevrolet Trailblazer LS 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDS13S84
P0301: Cylinder 1 Misfire Detected. Hello iATN members, this Trailblazer is driving me nuts. First it came in with 2 misfire codes cyl. #2 & #5, replaced coils and it was fine for a week then it came back with cyl. #1 misfire, I have done everything posible, compression test, new plugs, 3 co...
June 28, 2012