Question

I got two codes P1456 and P0401 on my 1998 Honda Accord 3.0L and Some fuel smell at times

Answer 1

P1456 Evaporative emission (EVAP) control system leakage (Fuel tank system)

Check the evap line to the evaporative evap canister , the evap hose tends to rot creating a evap leakage code.

Answer 2

P0401 HONDA Code - Exhaust Gas Recirculation Insufficient Flow
Read more: https://www.autocodes.com/p0401_honda.html

P1456 HONDA Code - Evaporative Emissions Control System Leakage Fuel Tank
Read more: https://www.autocodes.com/p1456_honda.html