Today on the freeway at 65mph the check engine light comes on. At speed the truck is fine, but getting up to speed if you have to slow the truck is a dog. I take the truck to work (about 10 miles from when the cel came on) and as I am turning into the parking lot two more things pop up--the water in fuel light comes on, and the oil pressure guage goes to zero which illuminates the check gauages light. The odd thing is that my water in fuel sensor has been disconnected for about 10K miles when I last changed the fuel filter. I checked the oil level and its fine. The pressure guage now pretty much just hangs at the 10-15psi spot regardless of egine rpm, or if the engine is even on! I pulled the codes and I am getting P0236, P0237, P0238 all witch point to the MAP sensor I imagaine. Now, it was raining/snowing today so I am kinda thinking something just got wet, I hope:-) Anyone have any pointers? Thanks! Steve

 

Check your connections at the ecm and pcm, those functions will go through either computer to the instrument cluster.

 

plug the wif back in and clean the map connections and element, is there a chance that you bumped it during a filter change? those codes are all map codes as you know and the symptoms are pretty consistent with map issues.