Live Data
Last reported case: 4 months ago
Based on 3 owner reports, 3 from forums)
What is P0306?
🚗P0306 on 2020 FORD Mustang
This page focuses specifically on P0306 issues reported by 2020 FORD Mustang owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2020 FORD Mustang Owners:
misfireelectrical noisefowlingelectrical interference
Parts Often Involved:
8 coilscoil circuitignition coilalternatorspark plugsfuel injectorplugscyl 6spark plugrectifier
What Owners Say
Real experiences from 2020 FORD Mustang owners
Experiencevia forum_post
“Given that the car has 180850 miles on it, I decided to change out all 8 coils and spark plugs. After replacing all mentioned I cleared the errors and drove the car for a couple miles around town with codes popping up by the time I got back home.”View original
Warningvia forum_reply
“They created electrical noise that messed with the sine wave of the DC voltage and confused the PCM , thus it threw the code. An alternator can charge just fine but still have a failing rectifier.”View original
Experiencevia forum_post
“How's it going everyone, sounds like a simple question but I'm stuck atm.... So, I bought an 04 GT from one of my buddies recently, and it came with a few issues that sounded easy enough to diagnose.”View original
Experiencevia forum_post
“P0306 code/ rough idling My idling has been rough for a bit, Ive changed the spark plug and the fuel injector, I had 3 p0306 codes at first then 2 after the spark plug and now 1 after the fuel injector.”View original
Experiencevia forum_reply
“P0345 was a common code on 05-08 gt with an alternator that had a failing rectifier (diodes). They created electrical noise that messed with the sine wave of the DC voltage and confused the PCM , thus it threw the code.”View original
Experiencevia forum_post
“My idling has been rough for a bit, Ive changed the spark plug and the fuel injector, I had 3 p0306 codes at first then 2 after the spark plug and now 1 after the fuel injector.”View original
These are real experiences shared by 2020 FORD Mustang owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 3 discussions about P0306 from 2020 FORD Mustang owners across automotive communities.
Success rate (33%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 9/10/2025