2015 Fiat 500 - Code P0339,P0300.

Vehicle had a long crank, hesitate to start, will not go 25mph, harsh trans shifting.
P0300 - Random Misfire
P0339 - Crank Position Sensor "A" Circuit Intermittent

[@geraldholmes3640]

Be sure and check all ground connections. It took me 6 months, but it was a ground wire from the computer. That was my issue

[@JuliusFarkas27]

Hi I’m having the same issues can you tell me what the fix is so I can avoid having a mechanic replace parts that are not causing the problem

[@osito10181]

Where are you located?

[@rwgtorn]

So im having same problem i think i was getting the p300 misfire code but running fine i stepped on it pretty good and it went into limp mode is it work trying too change just the crank sensor first or is it possable the crank sensor is good and the tone ring is broke and is that common on these cars that the tone ring breaks and the sensor cant read it ?