The other day I washed the engine bay with a garden hose and everything was running fine that day, but the next day the service engine light came on and the truck was idling rough. Today I got the codes read and they are as follows P0150, P0174, and P1174. What do you guys think it could be? I am almost sure that the water caused the problem because of the timing. Thanks for any help and suggestions that you can give me.

 

P0150 is low voltage from O2 sensor, like a short or connector full of water.

P0174 is Bank 2 lean - could be as simple as wet air filter.

P1174 is same bank outside values that ECU can compensate for. Vac leaks can also cause problems.

 

Thanks for the help. The only thing that I see is that the O2 connector and air filter would have been dry by now. Unless maybe the connector has water/condensation trapped in it and the air filter got ruined by the water. I will check those things out hopefully today or tomorrow and see what happens.

 

Which oxygen sensor is bank 2? I assume that it is the passenger side, but is it front or rear.

I checked the air filter and it was OK, I still went ahead and swapped it out for a new one that I have and the service engine light as well as the rough idle are still present.

 

It will dray out.
If OK before the wash, then it will be OK after.
Just get it hot by driving it.

When you park it outside - keep the hood open.