Question

I have a 1997 Isuzu Rodeo 3.2L V6 with code po446 you say its the wire harness, the one on purge valve or canister?

Answer 1

P0446 Evaporative emission control system vent control circuit malfunction

This code condition is for the vent control circuit, not the purge, What happens when you set a P0446 the FTP (fuel tank pressure) sensor does not report the true condition of the fuel tank pressure/ vacuum, The fix replace the FTP

​ 

The FTP not reporting the correct condition of the fuel tank pressure./vacuum is what set P0446