What is a P1456 code - 2002 Honda Accord

This code P1456 does mean that you replace purge valve . Could be other thing's must test the Evaporative emission system . P1456 Honda Evaporative Emissions Control System Leakage Fuel Tank Suggest you take an have a qualified repair shop diagnose the problem .

What make an model ? P1456 Honda Evaporative Emissions Control System Leakage Fuel Tank P1456 Nissan Evaporative Emission Control System Leak Detected Small Leak

Look at this information and don't ever over fill the car as it can push fuel into the emissions canister and cause problems.
http://honda-tech.com/honda-accord-1990-2002-2/98-accord-problem-code-p1456-2460060/

P1456 is a Honda manufacturer specific code for Evaporative Emissions Canister Leak Detected. Honda has a Technical Service Bulletin about that code that you should read but most often that code is caused either by a bad seal on the gas cap, or the cap no being tight enough. Either way, DTC P1456 isn't related to the vehicle not starting so you'll need to look elsewhere for the cause of the no start condition. First things to check are to see if there is fuel getting to the engine, and if there is spark getting to plugs. Hope that helps.

P1456 Honda Evaporative Emissions Control System Leakage Fuel Tank


How to Test Transmission Range Switch Honda 2 2L 2 3L

The two codes are unrelated. For the p1456 code, try tightening the gas cap.
For code p0705 (transmission Range Switch), review the info from the second link.

http://www.driveaccord.net/forums/attachment.php?attachmentid=7049&d=1169840715

Your Code P1456 is a EVAP (Evaporative Emission Control System Leak Detected). Normally this is a leak in the System and will not cause a Miss. The Fuel goes to the Fuel Rail and the Excess is sent back to the Fuel Tank via the EVAP System. There is a Purge Valve on top of the tank that is probably causing the leak. The Miss is another issue (Spark Plugs, Ignition, Coil, or clogged fuel filter) would be where I would start.

You have EVAP leak at the fuel tank you need to install a smoke machine on the EVAP system and where the smoke comes out there is your leak.

Just replace the evap purge valve.

code P1456 set when there's small leak in the fuel tank system.
Most known reason for P1456:
-Didn't tight fuel cap on until it click for more that 3 time after fueling up and drove the car too long with cap loose.
-or a bad gas cap.
I'll try tighting the gas cap.
clear check engine.
if code come back, replace gas cap and clear check engine light again.

Hey I had the same code and I have a 2000 honda civic lx. My cousin works at honda and drives a '96 honda civic and he has had that code before on his car as well.

First thing he came up with was that the catalytic converter was cracked. We checked mines, and lo and behold, that's what it was.

Look under your hood, and there should be a catalytic converter with a sensor sticking out of it. It is connected to the exhaust manifold and the sensor sticks out of the heat shield. Around the sensor, look for a crack. If there's a crack, that's your problem.