Question about Hyundai Motor 2003 Sonata

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How do i replace the oxygen sensor on a 2003 hyundai sonata. The car runs fine for a while then it will sputter and the engine will die. I wait a minute, start it up and the car is fine for a while before repeating the problem (about 150 +- milles later

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Did you pick up a fault code to explain your action as i dont believe the oxygen sensor is at might be that one of your other sensors is at fault.the 02 sensor only reads the emmition gasses but will not cut the engine.plse get the fault codes.

Posted on Jul 16, 2009


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I have a 2000 Hyundai sonata and my temp gauge goes down. Most of the time it's on the interstate and when it does this my car spits and sputters like its going to die. My check engine light is also on...

Hi Paige, Have the thermostat replaced and then see what happens. It sounds as if the engine temperature is the problem you have remained with, that's not to say the mass air flow sensor were not defective. Regards John

Apr 29, 2012 | 2000 Hyundai Sonata

1 Answer

How do you change oxygen sensors on a 2000 hyundai sonata

Locate the two oxygen sensors on either side of the Sonata's catalytic converter on the exhaust manifold. The Sonata's oxygen sensor is gold and shaped liked a spark plug.

  • 2 Remove the Sonata's wiring harness from the end of the two oxygen sensors using your fingers. Do not damage the end of Sonata's wiring harness.
  • 3 Remove the two oxygen sensors from the Sonata's manifold using the oxygen sensor wrench.
  • 4 Apply the anti-seize compound to the threads of the Sonata's two new oxygen sensors.
  • 5 Install the two new oxygen sensors to the Sonata's manifold using the oxygen sensor wrench. Re-attach the wiring harness to the two new oxygen sensors using your fingers.
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    My 2001 Hyundai Sonata's check engine light is on and it's running really rough, trying to die when idling and surging while being driven. Could his be a sensor, or maybe a coil? Thanks for any info you...

    I Have similar problems in mine. At engine idle it sounds like the engine has "hiccups" and when accelerated i lose power and sounds boggy or like the engine is choking. i ran tests and it is caused by failire of the oxygen or O2 censor. If you look at the very front of the engine at the exhaust manifold where the exhaust system starts there will be 2 plugs on the right side of the manifold and the bottom one is the o2 censor.

    Sep 10, 2010 | 2001 Hyundai Sonata

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    Engine sputters as the car accelerates before it is warm and today it stalled. I then started it again, it sputtered for about a minute and was then fine.

    Check your MAF Sensor on your air intake you may need to replace this sensor some are cheap you can go to Auto Zone or any auto parts store to order this or take it to a mechanic and have them diagnose this problem.
    Or check your air intake hoses etc if they are loose or just a little your engine will hesitate or run too lean and the engine light may go on.

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    2003 Hyundai Sonata starts when cold and dies after warming up.

    Wiring problem or the ECU (engine control unit) is defective. Try this, disconnect the battery cables from the battery and short/touch them together for 30 seconds (do not do this if connected to the battery). Then, reconnect the cables to the battery posts & see if that fixes it. If it doesn't, then there is a wiring problem associated with the cam pos snsr or the ECU has gone bad.

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    Check engine light is on intermittenly during driving

    Well to tell you the truth with so many sensors you need to put the car on a scanner to fix the problem.You dont want to be changing part after part and not fix it,can get expensive.Get it scanned pay 40 to 70 dllrs get a report and you can change the part.But open you hood and look around it can even be a vacum line.Good luck.I can guide you thru changing the part.

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    2004 Sonata stalls out for no reason then won't start

    hi there, i have a 2003 sonata and my car did the same. it stalled and the engine light stayed on but managed to get going again. i took it to Hyundai and it was the crank angle sensor. it needed replacing at NZD180.00 with 3 hours labour to do it. evidently they remove the front of the engine and cam belt etc. the workshop at Hyundai did it and charged 3 hours, not sure if that was excessive or not.

    Feb 05, 2009 | Hyundai Motor 2004 Sonata

    1 Answer

    Engine code p0421

    Catalyst System Efficiency Below Threshold (Bank 1)

    The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

    A code P0420 may mean that one or more of the following has happened:

    * Leaded fuel was used where unleaded was called for
    * An oxygen sensor is not reading (functioning) properly
    * The engine coolant temperature sensor is not working properly
    * Damaged or leaking exhaust manifold
    / catalytic converter / exhaust pipe
    * Retarded spark timing
    * The oxygen sensors in front and behind the converter are reporting too similar of readings

    To Do list

    * Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
    * Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
    * Inspect the downstream heated oxygen sensor (HO2), replace if necessary
    * Replace the catalytic converter

    Jan 04, 2009 | 2001 Hyundai Sonata

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    Hyundai Sonata 2003 - Engine Light - Code P0130

    i would because if there ever really is a problem you won't know because the light is already on

    Nov 19, 2008 | Hyundai Motor 2003 Sonata

    1 Answer

    Engine light on in Hyundai Sonata

    might have a oxygen sensor that went bad, take it to advance auto the trouble shoot for free

    Aug 27, 2008 | 2005 Hyundai Sonata

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