evap leak code po1457 2004 honda pilot 3.5?

Question

evap leak checked for leaks with smoke found none also checked cap also good replaced bypass evap valve still have problem i can watch the fuel pressure sensor and with the car off i have 1.5volts should be 2.5 with cap off start up car than it gose up to 2.5 also jumped out purge solinoild to any other ideas

Answer 1

this is a note from a Honda troubleshooting tips publication a while back concerning the P1457. It may help

Going buggy trying to troubleshoot DTC P1457
(EVAP canister system leakage) in a ’03–04 Pilot?
Check for a twisted EVAP system purge hose
between the purge valve and the service port on
the engine compartment bulkhead. If the hose is
twisted, it can cause either a restriction or a
blockage.
A blockage is easy to troubleshoot; it’s a
restriction that causes all the troubleshooting
headaches. A restriction can cause the problem to
be intermittent, to pass the EVAP System Function
Test, or both. It’s a good idea to run the function
test with the fuel tank level under 1/4 of a tank
(lower is better). A larger volume of air space in
the tank makes a restriction evident; a smaller
volume can mask the problem.
If a twisted hose is the culprit, the fix is easy. Just
loosen the hose, straighten it out, and retighten it.
If the function test detected this problem, make
sure you check your repair by doing the test again
after straightening the hose.

I also have a pdf of the advanced troubleshooting guide for that code that may help but I can't attach to this post; email me if you want me to send it to you separately. I don't know if it will tell you anything you haven't seen yet but it you may find something you overlooked if you read through it.

hope that helps

Answer 2

EVAP leak code P1457 (Control cannister)
Look for a leak at the cannister under the vehicle.