Question

2002 Nissan Pathfinder 3.5L with code p1456 said replace canister control vent valve and canister. But code P1446 says the same thing?

Answer 1

P1456 NISSAN - Evaporative Emission Control System Leak Detected Small Leak

Read more: https://www.autocodes.com/p1456_nissan.html

P1446 NISSAN - EVAP Canister Vent Control Valve Close

Read more: https://www.autocodes.com/p1446_nissan.html

Two different codes and different problems.

P1456 means that the there is an small leak in the EVAP system, and the P1446 that the EVAP vent control valve is not working properly.