Im pulling a code P1805 which says that its a secondary vacuum circuit malfunction. Cool. Now when i go to the 03 maxima FSM it says that P1805 is a "DTC P1805 BRAKE SWITCH???" Now I have a 97 max that is a FULL Swap from a 03 & started getting this code after some work was done to the Evap Sys. Im thinking that this code is somewhat related with the Evap but kinda puzzled on where to start looking cause im not throwing any more codes for the Evap. Anybody have any ideas?

 

did you put an aftermarket intake if so or even stock air box check to make sure all vacuums are connected

 

if you have the 5.5 gen ecu ('02-'03) which you do becuase of the full swap then you would go by the 03 FSM...

 

Double check the Brake switch just in case.(wouldnt hurt)

and double check that DTC code, you mentioned P1085 and P1805...

 

From reading the first post, he says that he referred to the '03 manual.

 

I know...

 

I have a Place Racing CIA, All is connected.

I used the 02, 03, 04

my mistake, its a p1805

Guess he was being sure