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This is a code for a leak in the evaporative system on the charcoal canister side of the system. The first test is to locate the canister vent shut valve on the side of the charcoal canister and the bypass solenoid under the cover next to the canister. Both solenoids have a Black/Yellow wire that supply voltage to the solenoid. The first check is to verify there is voltage to the solenoids, key on. If there is voltage to both solenoids, the second wire is the wire the engine control (ECM) module will ground to control the solenoid. On the canister vent shut valve, back probe the Green/White wire and ground it and verify the valve will close and hold vacuum, also verify it will open when the ground is taken away. If it fails replace it. Then on the bypass solenoid, ground the Blue wire and verify that solenoid will click and operate. If possible verify the engine control (ECM) module can ground the solenoids when commanded threw a scan tool. If either solenoid fails replace the solenoid and see if the code resets. If the solenoids pass their testing an evaporative simulation test will need to be performed
You common problem is a Defective Evaporative canister vent shut solenoid and or bypass solenoid and two way valve
Labor around $100
I just found this Technical service bulletins from Honda about this code 1457, you should call Honda 1800 number and see if they goodwill this repair under the warranty, don't cost anything to ask.
March 6, 2001
The MIL is on, and DTC P1457 [leak detected in EVAP control system (EVAP control canister system)] is set.
The symptom could be the result of any of these causes:
Retrieve the DTC with the PGM Tester, and review the Freeze Data. Depending on whether the feedback condition of the primary H025 reads "open" or "closed," take the appropriate action described in DIAGNOSIS.
WARRANTY CLAIM INFORMATION