Question about 2001 Hyundai Accent

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Code po442 eng ligh on

Code po442

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You have a small leak in your evap system

Posted on Apr 04, 2010

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Hi there,
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Posted on Jan 02, 2017

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What are the problems when it had diganostic codes of po 496 po 455 po442 and po121


po121 is throttle position sensor is out of range.po442 is emissions system leak detected small leak.po455 is same as po442 but large leak.po496 is high purge flow . Check all the vacuum lines plastic also cause one of them is broken.

Dec 08, 2017 | Cars & Trucks

1 Answer

How to fix obd2 trouble code P1680 on a 2004 Isuzu ascender 4.2l eng


code p 0300 refers to random/ multiple misfires detected ===causes --spark plug/s--HT lead/s--injector/s --ignition coil/s--low compression --wiring
most likely low fuel pressure and injector problems
code p 0442 refers to evaporative emission (EVAP) system ---small leak detected ===causes hose connection/s--intake leak-- EVAP canister ---EVAP canister purge valve
it also refers to --large leak detected ===causes ---petrol cap loose ,/missing---mechanical fault ---EVAP pressure sensor
code p 0455 refers to EVAP ---large leak detected --all those stated plus EVAP canister purge valve
code p1680 refers to electric throttle control (ETC) monitor ---processor fault ===causes --wiring--ECT monitor

Sep 30, 2016 | Isuzu Cars & Trucks

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Error code po442 1998 saturn sl1


Google the codes & read up

You need a repair shop to diagnose
the Evap System

TYPE: OBD PO442

Aug 26, 2014 | Cars & Trucks

1 Answer

OEM NUMBER TO CROSS PO442, HAVE REPLACED FUEL FILLER CAP. CHECK ENG. LIGHT STILL ON. WANTING TO KNOW LOCATION OF EVAP CANISTER, AND PURGE OR VENT SOLENOID...


You've posted this question twice. When you post it a third time, could you specify the year, make, and model of your car or truck?

Apr 05, 2013 | Cars & Trucks

1 Answer

Ford trouble codes po442.......po455.where to look for problem. have repacedgas cap.


EVAP Codes. You will have to go thru entire evap system,looking for a small leak (po442) Hoses,Switches,Valves etc. See if you can borrow a smoke machine.

Mar 16, 2010 | 2004 Ford Explorer Sport Trac

1 Answer

I have serv eng light on with code # PO172 , PO128 , and PO442 , and I replaced fuel tank cap today , light still on ,and I need to get inspection , but I am out of work and can't afford expensive repair...


Code p0172 is MAF, vacuum leak, and fuel pressure.
You can see my TIPS on this site to help with the MAF.
Code p0128 is Low ccolant, ECT or the IAT.
code p0442 is your EVAP system.
Please let me know what you find.

Feb 12, 2010 | 2003 Chevrolet TrailBlazer

1 Answer

Engine light on Codes show 1. Po 441 evaporation emission system incorrect purge flow 2. Po442 evap emission system leak (small) 2. 446 evap emission system incorrect purse flow 2004 Toyota Tacoma pickup...


Hello! Those three codes commonly indicate the followi possibilities:

The gas cap was not sufficiently tightenend ater fueling, a bad gas-cap rubber o-ring, the vehicle had the key in the 'on', or engine running, or the tank was filed all of the way up the neck.

Any one of the abope causes will set all three codes.

Dec 20, 2009 | 2004 Toyota Tacoma

1 Answer

Codes are Po442,PO420,PO131 and PO401.I beleive these all have to do with exhaust emission or leaks


okay po442 isevap leak check gas cap amd right front tower in engine check evap line for broken hose,po131 bad o2 sensor top sensor on rear exhaust manifold,po420 is bad catalyic converter but could be o2 sensor.i would replace o2 first reset eng lingt and go from there, hope this helps good luck.

Oct 07, 2009 | 2003 Dodge Caravan

1 Answer

Diagnostic code PO442


PO442 is an Evaporation Emission leak. It's probably a loose gas cap. The fix would be $96.00 at our dealership, since your truck is out of warranty. You may be able to get it fixed cheaper, but you'll be charged a diagnostic fee.

Jun 24, 2008 | 2002 Mazda Protege

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