Elisa

Has there been an update on this? The same thing is happening to my 2015 3.6 DJ and I have replaced all spark plugs and coil packs. I have replaced a couple of them twice in 4 months.

@John/Horace Thank you for the guidance. I have been reviewing similar concerns on this site. Has anyone heard of the extended warranty that Dodge had released regarding a known cylinder issue that causes the continued replacement of spark plugs (misfires)? I believe it’s 10 years or 150k. It’s not a recall which makes it difficult to track. At least for me. I want to research that further as well. I was certain that I had read info. on a thread on this site.

@tsteves5 - Thanks for your response. Was it an expensive piston ring fix?

I have replaced all 6 spark plugs and coil packs. Yet, my spark plugs continuously misfire and I have replace #5 on three occasions in the past 4 months. What is the cause of the continuous misfire on 5? What does PO420 mean? I have replaced the catalytic converter 11 months ago. Could the spark plug misfire be related to a cylinder issue?