i have both these codes and so far have tested with switching the o2 sensors on the front o2, swapping coils 1 and 3 with 2 and 4, and the same with the injectors still having all of bank 1 misfiring only at idle still havent ran a compression test but has anyone else have a similar problem
damz67
Is it getting spark on that bank? How about injector pulse? There are injector fuses check those and unplug the main coil pack connector on the valve cover and plug it back in. There’s a ground wire on the back of that head. Take a 15mm wrench and tighten it. It’s the ground strap that runs up to the firewall. A lot of times it’s process of elimination make sure it has fuel and spark first. Good luck
P0172 is a code you get for too much fuel in the system. I would grab the obd2 code reader and see if it will show your O2 sensor, check and make sure it is switching fast enough. it should vary pretty fast between 0 and 1000. sometimes they go bad and cause the computer to add fuel, which can cause a P0300.
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