Question about 2000 Honda Civic

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Diagnostic code...p1456 what is this code?

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Either tighten gas cap and restart car should go awwy , may need new cap to resolve problem , if not that it is a fuel mixture sensor

Posted on Apr 18, 2010

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Find and replace canister purge valve for 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 .

Oct 08, 2016 | 2002 Honda Accord

1 Answer

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

1 Answer

P1456 code


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.

Apr 01, 2014 | 2002 Nissan Sentra

2 Answers

2002 acura TL-s engine code p1456.


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.

Jan 25, 2014 | 1999 Acura TL

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2002 acura TL-s engine code p1456


Code P1456: EVAP control system leakage (fuel system).
Probable causes:
1. Wire harness. Check for correct voltage, open, short to ground, short to voltage
2. Control unit software in need of updating
3. Faulty PCM or ECM
4. Vacuum leaks. Damaged hoses or improper routing
5. EVAP system. Check canister, valves, or components. (gas cap excluded because you say you replaced it)

Some or all of the above could be the source of the check engine light problem.

Jan 25, 2014 | 1999 Acura TL

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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

1 Answer

My check engine light came on today. i had a


There is no P4156 but, there is P1456....it is this:

P1456 EVAP System Leak Detected (Fuel Tank)

You either have a cracked hose or an air leak to or on the fuel tank.

Jul 29, 2009 | 1999 Honda Civic

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