Hi!

I had problems with coolant level sensor and in the end it was the magnet in the expansion tank that was stuck.

I think I was bit too careless with water and got moisture in #8 cylinder spark plug because now I'm getting fault codes p0308 and p1314. Engine idle is quite harsh.

How would you advice to solve this problem? Would spraying lots of CRC 5-56 or WD40 help get moisture out without disassembling anything?

 

You need to remove the coil cover and the coi. The plug boot should be cleaned inside and out, the coil the coil and plug wiped dry and the connector cleaned with electrical contact cleaner.