akirhol

First off, the vehicle in question is an MY02. Codes received are P1259 and P1456.
I had recently over-revved the engine like a dumbass, so it prompted me to finally pull the valve cover and check the retainers since I had purchased the vehicle used anyways.

Through the process, to get a bit more play on the coil pack wire harness (not sure exactly what to call it, hopefully that gets the point across) I had removed the two plugs circled in the picture below.

After putting the valve cover back on (no cracked retainers) and getting everything set back in place, I had forgotten about these two plugs I had removed. The CEL came on as soon as I turned the key but it was solid so I fired it up and it seemed to be working fine. I have *not* taken it for a drive yet, I have a 3rd vehicle so the S can play garage queen when necessary. I plugged the wires back in, but the CEL remained.

Rented a scanner from Autozone and pulled the codes listed above. The plugs are already reseated at this point so I cleared the codes using the scanner, turned the vehicle off and fired it up again. The codes did not return, but I still have not taken it for a drive.

My question to the forum, what are these plugs used for? Is it normal to receive those codes having left the plugs unseated?

Picture of the plugs referenced above:

Billman250

Plugs are for the vtec solonoid valve, and that's where your P1259 came from.

P1456 is 95% chance a non-sealing gas cap (not related)

akirhol

Awesome, thanks for the reply Billman.

Took it for a drive and didn't have any issues with VTEC or otherwise... no return of the P1456 either but I haven't plugged the scanner back in to see if it's a pending code either. I'll check that later but sounds like I should be good to go for now.