Question about 2004 Honda Pilot

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Check engine light came on. Code P1456.

Check engine light came on. The code comes back as an emissions problem (P1456). Dealer and local mechanic can't find a leak. I replaced the gas cap, but no change. I don't notice a stronger than usual gas smell at the gas cap, but there is no longer a swoosh sound when I take the gas cap off though. And my mileage has been terrible. Any suggestions?

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Did you change the gas cap with a Honda gas cap? Tighten it at least three clicks?
Also, Honda recommends that you never top off the tank when getting gas (only go to the click-off of the pump; otherwise you can get back flow into the system that will cause the code).
Tightening or replacing the cap will not immediately cause the light to go off; it can take up to three days of driving for the light to reset.
To check if your readiness codes (emission system) are set, turn the ignition to ON (II), without starting the engine. The Malfunction Indicator Lamp will come on for 20 seconds. If it then goes off, the readiness codes are set. If it blinks 5 times, the readiness codes are not set.
You can, of course, try resetting your engine light to see if it will come back on (which it probably will). I believe the procedure is:
Turn off the engine.
Press and hold the Select/Reset knob (odometer) in the instrument panel, then turn the ignition switch to ON (II).
Hold the knob for approximately ten seconds until the indicator resets.

Hope this helps you.

Posted on Nov 17, 2009

  • philschneide
    philschneide Nov 17, 2009

    Sorry, I gave you the procedure for resetting your maintenance light, not you malfunction light. I think you would have to turn off you malfunction light through the use of a OBDII code reader or scanner. Autozone will do it without charge.

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My check engine light came on last week, and just a few days ago it shut off on its own. But the code is still there. What can I do to get rid of the code?

Posted on Nov 07, 2015

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1 Answer

Having a gas smell coming from the back of the car near tell pike


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/

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What is Code P1456 DTC


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.

May 06, 2014 | 1998 Honda Accord

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What is a P1456 code


Hi James,
Kindly check this website for you for detailed description of code P1456.
P1456 Honda Evaporative Emissions Control System Leakage Fuel Tank

May 06, 2014 | 2002 Honda Accord

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I have honda odyssey and the service engin coms on and the cod is p1456 so ineed to figur out thanks.


This probably means:
  • P1456: Evaporative Emission Control System Leak Detected (Fuel Tank System)
  • Usually this is because your gas cap was not fully tightened. Be sure to turn it until you hear a click.
  • After you tighten the cap, it might take a couple days of driving before the light goes-out.
  • Be careful to tighten your gas cap regularly, because otherwise it puts a heavy strain on your emission system.
-

Mar 03, 2011 | 2000 Honda Odyssey

1 Answer

P1456


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.

Dec 15, 2010 | 2001 Honda Odyssey

2 Answers

@004 Pilot the check engine light came on after my daughter bought gas. Autozone code was p1456. Car seems to be running fine.


2004 Honda Pilot engine light came on this morning. Last bought gas 5 days ago. Auto Zone checked and found code P1456, emission control system leak detected (fuel tank system)
Four options;
1) Loose fuel cap
2) Vapor canister saturated
3) Failed vent solanoid
4) Failed purge solenoid

Thanks.

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Ken,
You will want to take your car to your local Auto Zone or Advance auto and ask them to scan the car for trouble codes. They will do it for you at no charge and you will see what is causing the the service engine light to come on. You can write the codes down and respond back so we can start diagnosing.
Let me know what the codes are, good luck.
Regards,

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2 Answers

Codes p1456&p1035


Hi,

P1456 Evaporative Emission Control System Leak Detected (Fuel Tank System)

I didn't see your p1035 code, but I found a good site for your reference:

http://www.engine-light-help.com/honda-check-engine-light.html

Hope this helps... Good luck!

Aug 27, 2009 | 1998 Honda Civic

1 Answer

2001 Honda - New Catalytics & O2 sensors -- new 0420/1739/1456


I would send the car for a smoke test for the emissions leak...Find out where the leak is comming from..Repair it..Reset the codes, then do a drive cycle and see what happens...

Jun 29, 2009 | 2001 Honda Odyssey

3 Answers

My 2000 honda civic engine light on code p1456


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.

Apr 23, 2009 | 2000 Honda Civic

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