My daughter has a 2009 Camry with a v6. She was having these codes last year and after research I changed the coil packs and spark plugs. The car ran great for almost a year and the problem occurred again. I had another set of coils and plugs so I put them in. Within a month we are getting the same codes again. When I originally bought the coil packs and plugs, I bought 2 sets as both my daughter and son drive v6 camrys. The coil packs were not OEM and I've learned my lesson and have ordered OEM coil packs. Before I replace the coil packs, is there anything else I should check?
People always seem to focus on them, but plugs and coils aren't the only things that cause misfire. An engine needs fuel, air and spark to run properly. As well as tight seals.
https://www.youtube.com/watch?v=OyvdWeyDHf4
It definitely could be a million things but in this case since the coils fix it at least temporarily I would say your on the right track. Just aftermarket coils are generally always junk and don’t last
