Question

How do I fix P1457 on 2004 Honda Odyssey? Need diagrams/directions

Answer 1

P1457 Evap control system leakage (Evap cansister system)

This is going to be the FTP (Fuel tank Pressure) sensor, what happen is that it read incorrectly and in doing so it codes P1457. Honda has produced a TSB about this condition and what gets missed in the repair field is the tech not looking at the data stream of where the FTP value is.

Answer 2

P1457 HONDA Code - Evaporative Emissions Control System Leakage EVAP Canister System
Read more: https://www.autocodes.com/p1457_honda.html