Hey everyone, I am new and have a issue this might have been covered before but, I have have a 2005 Durango with 118,000. Three weeks ago I was driving in morning to work, roughly 1 minute into ride is started to kinda hesitate I was low and gas thought that was issue filled up and started and ran fine, this happened again another week later and the check engine light came on but went away shortly after. then another 5 days passed this time was worst. Rough idleing at traffic lights, and hesitation on acceleration. Got up to 30 MPH and car ran fine and had a decent strecth of green lights and then next slow down everything was fine. happened again 2 days later took into shop they got 2 codes..P0300 multiple cylinder misfire and P0155 B2S1 O2 sensor. They replaced the O2 sensor and sent me on way. Very next morning exact same issue took bad to shop they look and found similar P0300 code but that was it, they kept over night to see if problem would occur and nothing...I had it 4 days now and ran fine until this morning exact same thing, 1 min into ride check engine light, rough idle, hesitant acceleration. They said with the P0300 code they wernt sure where to start with things and didnt want to just start replacing things and charge me and have it not work.....WHat can this be, again they did replace the B2S1 O2 sensor but still having issue and what does the P0300 mean

 

P0300 is a random misfire.
FF

 

Its been a while but the solution that was found from my mechanic finally was that a computer needed to be replaced that controls the engine and when things fire.