Hello. I have a 2011 Honda Accord ex 3.5. Nice car! It has recently thrown 3 codes “permanent” so it says. P0305, p0354 and p0356. I’ve changed all of the plugs and coils. Will the codes clear themselves or do I need a professional scanner for this?! The car is still running rough and the check engine is still on.

 

The codes will clear themselves(eventually), although it sounds as if though its not fixed.

In that case, they wont clear........