V35 skyline engine light

[john lehner on my head]

My engine light came on after a downpour heavy rain

It affecting the gearchanges in triptronic mode

It made the engine run rough 

I heard about oxygen sensor but this just happens after rain or washing car

The engine light wont go off but after a few days in the hot sun everything seems to be normal but engine light still on

 

 

[The Max]

You'll need an OBD scan tool to reveal the code so that you know what's upsetting it.

If you don't have access to one, then you'll need to take it to a mechanic.

[Nightcrawler]

I would imagine you have a grommet leak somewhere between your firewall and engine bay, and water is getting into your wiring or ECU. Definitely get it checked out asap by a decent mechanic.