Question

Do you have a picture of where I can find the P1457 and P0505 on a 1999 Honda Odyssey?

Answer 1

P1457 Leak detected in EVAP control system (EVAP control canister)

P0505 Malfunction in idle control system

When you code P0505 this can be caused by false air or vacuum leak causing higher idle , check the vacuum hose especially the PCV valve As for EVAP leak at the EVAP canistor at the EVAP canister is a solenoid on the canister due to its location the wire for the vent tends to break off and cause P0505, even a disconnected vacuum hose on the EVAP will cause this, Do inspection first on the vacuum hose these code together can be related

Answer 2

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

P0505 HONDA Code - Idle Air Control Valve
Read more: https://www.autocodes.com/p0505_honda.html