Question about Hyundai Elantra

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I failed the smog check on my 2002 Hyundai Elantra GT, due to a check engine light and an OBD fault Code: PO441 EVAP Ctrl Incorrect Purge Flow. How can I repair myself to avoid paying $600+ estimate I was given to replace EVAP Sediod $371.06 and the Oxygen sensor $168.70, labor would total $168.00.

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  • Dennis Sy Jul 25, 2009

    Is it possible to find out if the EVAP Selnoid is the actual problem that caused MIL to go on and generate a OBD Fault Code PO441? The estimate that I received for repairing these problems was almost $700. Considering the only thing that failed according to the Smog Check Vehicle Inspection Report was MIL/Check Engine Light. Otherwise the vehicle passed all the emissions test and comprehensive visual inspection. What can I do to confirm that these cost are legitimate and necessary? Can I save money by purchasing a used Selnoid at a Parts Yard or get a cheaper aftermarket EVAP Selnoid that won't cost $370? Thanks for taking the time in providing me with your expertise advise.



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Well, the O2 sensors are on the exhaust pipe close to the engine under the hood. They just unscrew and you would just need to disconnect the wiring from the bad one(s) and reconnect to the new one(s). Hopefully they told you which one was bad, as you have an upstream and a downstream one. You can get a new sensor from a dealer or an auto parts store. The Evap Solenoid is a little harder to replace. I recommend buying a Chilton or Haynes manual from a local auto parts store and getting the pictures and instructions from there so you have a easier time of finding both parts and if you plan on doing a lot of other work, then these manuals can save you a ton of money. Let me know how this turns out


Posted on Jul 25, 2009

  • Benjamin Patri
    Benjamin Patri Jul 25, 2009

    You can save money by getting a used one or can see what local auto parts stores will sell a new one for which will be aftermarket many times. You can search for a used but I would caution against it as it may not last as long or may turn out to be bad. If you know someone with the same model, try switching theirs and putting it on yours to see if that would fix the problem if you can as that is always the best way to check if it will fix the problem.



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INSPECTION (4 cylinder engine)
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General Description
The evaporative emission control system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The ECM controls the Purge Control Solenoid Valve (PCSV) to purge any collected vapors from the canister back to the engine for combustlon. This valve is actuated by the purge control signal from the PCM and controls fuel vapor from the canister to the intake manifold.
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