I am having issues with my used 2016 LX Odyssey. It was coming back with P0302 code Cylinder 1 misfire for few weeks now. On and off, i changed all spark plugs 8 months ago so i it's not that. I changed coils on cylinder 1 and it didn't do nothing. I swapped cyl1 and 6 coild and the issue remained. few weeks forward and now all of the sudden cyl 2 has that code. Since it's kicking my *** my neighbor is asking me if I have VCM on my odyssey but best of my knowledge i do not. I don't have that printed on my engine cover. I used the VIN decoder but that does not mention anything about VCM. Am I blind? Please help
Thank you

 

FYI, you cannot rely on Honda's ECU/PGM to tell you which cylinder is misfire. If you have OBDII scanner that can display misfire count, then you can use that to identify the ignition coil that is broken. The computer is just guessing the misfire for the cylinder, so you can't use P0302 code to confirm ignition coil #2 is bad.

If you don't have tool, then disconnect at least 2 ignition coil and uses engine vibration to tell you which ignition coil is bad.

Note: Disconnecting 1 ignition coil won't gives visible vibration or rpm different that human can feel

Approach:
1. disconnects the ignition coil power plug that the car's OBDII tells you that it is bad, e.g. cylinder 1
2. ensures the engine's rpm or vibration is identical before and after you perform #1
3. if engine rpm goes down, or shake more, then cylinder 1's ignition coil is good. As indicated above, when you have 2 ignition coil bad or disconnected, only then the engine will shake/vibrate more
4. if engine's rpm or vibration is identical, then highly possible this is the bad ignition coil, but continue the test
5. leaves ignition coil #1 disconnected. Disconnect the next ignition coil's power plug, and observe the engine rpm/vibration
6. if vibration is identical (2 disconnected), then this ignition coil could be bad as well. Leaves it disconnected
7. if vibration is worse, then this ignition coil is good. Connects it back
8. Proceeds to disconnect next ignition coil, and observes the vibration
9. If vibration is worse, then this ignition coil is good. Connects it back
10. Repeat Step 7-9, and always keep 2 ignition coil disconnected when observe engine vibration

If your body can't sense the change in engine vibration with 2 ignition coil disconnected (power plug), then disconnects 3 ignition coil. The vibration will be bigger with 3 ignition coil disconnected This mean when performing above procedure, don't connect ignition coil back in step #7, and always have 3 ignition coil disconnected

After you identify the ignition coil that is broken, then replace it with a good unit. Swapping ignition coil around won't necessary change the P0302 as this is ECU/PGM's guess.

Note: I have used go through your experience, as well as your approach, and found this doesn't fix the problem. However, I have Honda OBDII scanner as well uses above approach (after I saw the engine misfire count) to come up with above procedure (you can find this in Internet and YouTube) but many do not mention that you need to keep 2 ignition coil disconnected (all of them said disconnect 1 ignition coil)