EFI fault after washing

[Noisy]

Never had this before reinstalling the engine but now everytime I wash the car I get a EFI Fault, is there a common point for water ingress?

[Flintstone]

Probably. Not that I wash mine much (every four to six months) but I have had it. Also after splashing through big puddles. Soon goes away.

[dvs_dave]

Have you sealed the spark plug cover properly?

[Noisy]

Yep its all sealed, the car doesn't misfire when it does it, just gives a warning, the plug holes getting wet make it run on about 4 cylinders, found that on a Tamora I looked over once. I'm guessing one sensor plug is taking in a bit of water, but trying to figure out which one, will plug in the laptop then wash it again.