hi folks was driving last night on the highway in extremely heavy rain and the check engine light came on. it has thrown 2 codes , when i scanned it said 4 codes but it was the same code twice. p1800 is the VIAS colenoid valve and the p420 is the cat bank 1...

question what does the VIAS valve look like and where exactly is it located and is the 2nd code related with the 1st one as one is an intake issue and the other an exhaust issue,,,

i am trying to post a diagram of the engine also if it helps .. thanks guys

http://www.flickr.com/photos/8280912@N05/4458255876/

any advice appreciated

 

this will help for the p1800
http://www.nissanhelp.com/diy/obd_codes/p1800.htm

 

here's a pic of the location of the VIAS solenoid