P0442 NISSAN - pathfinder 2002

Question

there are at least 4 or 5 sensors that a442 code is set off is there a way to narrow down the possibilities so im not changing good sensors for no reason. a tester a procedure a tool a'"secrete" that can be shared? overall there is no change in the driving of the truck it runs very well but the service engine light needs to go off po442 and p1456 codes come up

Answer 1

Both P0442 and P1456 codes means that there is a small EVAP leak. The most common cause of this problem is a a loose gas cap. Try tighten the cap and clear the code first. If the codes come back, the second most common problem is the EVAP Canister Purge Volume Control Solenoid Valve.