I'm getting codes p1259 ND p1399.. what exactly do I need to change..

Question

I just want to figure out what exactly I need instead of fixing everything that could be wrong

Answer 1

P1399 Random misfire

P1259 VTEC system malfucntion

When P1399 occurs Honda associate this with either a EGR system or valve clearance, What happens when a P1399 ocuurs is the EGR port that is metered for a 4 or 6 clyinder vehicle some of the EGR ports become plugged resulting in too much EGR gas going into a non clogged EGR port. For  P1259 is for the VTEC system , replace the VTEC solenoid being a solenoid that can be faulty can result in burning its driver in the ECM.

 When it comes to solenoid, a faulty solenoid left unrepaired can  burn its driver in the ECM resulting with a ECM as part of the problem