623baller

I washed my engine bay yesterday , i blew dry engine bay with air to get it as dry as possible before turning it up. At first i did not see any CEL but after about 10 minutes of idling and was about to go for a quick test drive, i see the following CEL pop

P1399 (pending fault) - Power Train
P0300 - Random/Multiple cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected

i checked cylinder 1 and 2 both are bone dry, i dont see any water in there. cleared the code , idled for 10 minutes and went for a 5 minute drive, no CEL.

next morning, i let it idle for 5~10 minutes, no CEL but shortly after i did a few empty revs and same CEL came back.

for the sake of just checking, i checked Cylinder 3 and 4 and both are bone dry, cleared the code agian and went for a quick test drive (4~5 miles) and no CEL. but i still scanned it with obdii, i got P1399 pending fault code

just wondering what would be the next step before i take it to a shop to get inspected

Hfreak

I would run the car through a few drive cycles and clear any CEL if they appear during your drives. You may have some moisture in a connector that is causing the fault, the drive cycles will likely allow the moisture to evaporate. Hope everything works out for you.

623baller

awesome, yea that's what i am hoping for just some connector or sensor that's still wet. unfortunately not my daily driver and it's been raining a lot, hopefully it just dries out and i didnt cause any real damage.

windhund116

I suppose you could pulled the coil connectors apart, dry them with compressed air. And treat with a good contact cleaner/lubricant. I like Deoxit D100 for all my dirt bike electrical connections. Including grounding points. Keeps moisture and rust out.

623baller

i did pull them apart while i was checking all cylinders. they all look dry but you got a good point, maybe it got some dirt trapped in there after the wash

623baller

lol ok , started it up today and just let it idle, no codes for 5 minutes of idling

i started giving it some rev while in neutral P1399 comes back. then to my surprirse a new code, P2445 - secondary air injections system stuck off bank 1

errr is this something i should just reset and see if it comes back

both code does not throw CEL on the dashboard but i pulled the code while doing the OBDII scan

windhund116

Yeah, I'd clear the error mess and start over.

Good luck!

623baller

lol god damn it, p2445 did not come back but i got p04010 - secondary air injection system

cleared it twice and came back both time

60a fuse seems to be fine

mirabileboy

Check your vacuum lines for water. I got that code when I swapped intakes and crossed the little vacuum lines under the fuel rail cover. Just an idea

S2k90

^this sounds right too
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I've had my friend throw a P0410 in his 03 S2000 and it was just a bad fuse.