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2003 Mitsubishi lancer with fault code po456 evap system what are common causes

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Posted on Jan 02, 2017

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SOURCE: 2003 Mitsubishi Lancer

so u have a CH/CG lancer

you would need to remove the two 10mm bolts from the coil packs and leads and then stick the smaller version of spark plug socket in remove them, bear in mind if u have a mivec motor the spark plugs MUST be Platinum :)

Posted on Jan 02, 2009


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1 Answer

Po456 check engine light on lexus es330

code p0456 refers to evaporative emission system--very small leak detected===causes --mechanical fault--hose connections--EVAP pressure sensor.
Mechanical fault could be as simple as the fuel cap is not on tight.

May 20, 2014 | Cars & Trucks

2 Answers

I have a 2004 town and country. I have had codes po440 on for about 9 months with no symptoms. Then po456 showed up. My van started surging wanting to take off after filling the tank. Then it would not...

code p0440 refers to evaporative emission (EVAP) system--malfunction===causes -hose connections--intake leak--EVAP canister
code po456 refers to the evaporative emission system--very small leak detected===causes --mechanical fault--hose---EVAP pressure sensor. The cracked hos may be the fault but I would be looking at the canister for the fault.

Nov 03, 2013 | Cars & Trucks

1 Answer

Codes0441 0442 0455 0456

codes po441 po442 po455 po456. code po441 - EVAP system no flow during purge conditions.code po442 -EVAP system small leak detected conditions. code po455 - EVAP system large leak detected conditions.code po456 - EVAP system very small leak detected. possible causes loose damaged missing fuel cap.fuel tank sensor disconnected or failed. ORING on top fuel sending unit leaking.purge valve vapor line clogged disconnected or purge solenoid failed.vent solenoid not closing or has failed.

May 23, 2013 | 2002 Dodge Durango

1 Answer

What does code po456 means

codse p0456 refers to evaporative emission system-- very small leak detected.. probable causes -----mechanical fault---hose connections loose---EVAP pressure sensor.. I would look at the EVAP sensor as being faulty

Mar 10, 2013 | 2004 Jeep Grand Cherokee

1 Answer

Code po441

Fault code P0441 usually indicates an issue with the Evap Emision Control System Purge Flow. Possible causes are listed below:
  1. Bad vacuum switch
  2. Broken or damaged EVAP line or canister
  3. Open in PCM purge command circuit
  4. Open or short in Voltage feed circuit to Purge Solenoid
  5. Faulty purge solenoid
  6. Restriction in EVAP solenoid, line or canister
  7. Corrosion or resistance in purge connector
  8. Bad PCM

Dec 30, 2011 | 2002 Mitsubishi Lancer

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I have a 2003 mitsubishi lancer I'm getting the

Inspect for crack on the air intake tube between the Mass Air flow (MAF) to the intake manifold on the motor.
A loose clamp or crack on the air passage way will cause this problem.
P0442 code takes 2-5 drive cycle to reset by itself.
Do some mix city / highway driving.
If there is no EVAP leak then it should be clear within 50 miles.

Aug 11, 2011 | 2003 Mitsubishi Lancer

1 Answer

Po421 and po456 mitsubishi lancer 2002.

po421 warm up catalist efficiency below threshold. could be o2 sensor after converter, could be a bad converter, or bad plugs.

po456 evaporative emission system ( evap ) very small leak detected

Jan 09, 2011 | Mitsubishi Lancer Cars & Trucks

1 Answer

I have a obd code of PO456 for a 2003 dodge Durango.Do you know what that would be.

When you get the code,find out what it is,or buy a code reader and a book of codes

PO456 EVAP Contol System Leak (Very Small) 0.508mm (0.020 inch)

Gas Cap
Holes or cuts in fuel vapor hoses
Loose hoses
Evap Component failures
Vent solenoid open
Canister Purge Valve,issues

And on and on

Have a smoke machine put on the system and repaired

Nov 05, 2010 | Dodge Durango Cars & Trucks

2 Answers

PO456 code on 2002 Jeep Wrangler.Where do I start?

p0456 is ayoun evap fault honestly this is a job for a professional with the correct diagnostic equipment jsut from memory it is a vent control fault. if you have access to alldata or mitchel on demand you can get diagnostic steps for the proper diagnosis. unless you have the proper tools this is a job left to a good repair technician that you trust sorry i cant give you a straight answer but you will throw away money buy just replacing parts and hoping it fixes it, just food for thought if the code is cleared it will take time to come back the only way to conferm the repair is a evap self test that can be done with the adiquite scan tool

Nov 12, 2009 | 2002 Jeep Wrangler

1 Answer

Trouble code P0456,eng.idles rough at idle


Aug 01, 2009 | 2003 Dodge Durango

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