Question about 2002 Nissan Maxima

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P1456 code - 2002 Nissan Maxima

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Trouble Code: P1456


EVAP System Very Small Leak (0.020") Detected

Possible Causes:


EVAP control system pressure sensor is damaged or has failed

EVAP purge solenoid is damaged or has failed

EVAP canister vent control valve is damaged or has failed

Fuel tank cap not tightened properly or the wrong part number

Fuel tank temperature sensor is damaged or has failed

Fuel tank vacuum relief valve is damaged or has failed

Very small leak in the EVAP canister or in the fuel tank area

ORVR system is damaged or has a small leak in a component

Refueling control valve is damaged or has failed

Posted on Sep 10, 2009

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1 Answer

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

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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

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.

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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

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

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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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