Question about 2001 Hyundai Sonata

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2001 sonata V6 spark plug

I have a 2001 sonata V6 and recently I had check engine light on. The code is P0303 - cylinder 3 misfire. I would like to change the spark plug and wire first, but I don't have manual and no idea which one is cylinder 3. Could someone tell me how the 6 cylinders are located on the engine.

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  • Anonymous Mar 21, 2014

    the socket seems to be to short to fit to the base of the plug any suggestions please

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Hi if one is gone you nead to do the lot i had a simaler problem the inlet manafold is to be removed to get at the plugs so do the plugs and the leeds will fix your problem cheers

Posted on Dec 26, 2010

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For starters if your going to do 1 do all. The locations are from left to right when standing in front of the car. 1, 3, 5
2, 4, 6

wires are 3
6
2
4
5
1

Posted on Nov 05, 2008

  • Tom Hickey
    Tom Hickey Feb 16, 2011

    You have to order a plenum gasket, as you have to move the upper plenum to access the rear plugs. Replace the plugwires (Around $44 at Advance Auto) It's not worth removing the plenum again to replace the wires so do it the first time. Examine your plugs. They should be a light honey brown color. A dark plug means it's not firing efficiently. While you have the plenum off I would suggest doing a compression check of the # 3 cylinder, should be around 120. Mytwo cents!

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Car sputtering badly. Codes P303 n P102 show on diagnostics and have replaced both parts associated with these codes,PLUS, new fuel filter, engine still sputtering badly.


Hi,

I hope I can help with this. This could mean the engine spark plugs or plug is the issue. Also check the exhaust pipe. White smoke indicates a coolant issue. Check your coolant reservoir. Black smoke indicates a Fuel issue. Blue is an oil issue. Also, speaking of your spark plugs there very well could be a misfire.

the code P303 could be cylinder 3 misfire
P102 the mass air flow sensor which is on the air filter cover. It's an electrical part and is sensor. Please check these and let me know.

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Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
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Running out of fuel.
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Kinda putters then engine light came on and its giving me a code p0303


p0303 is a mutible engine misfire on number 3 cylinder. the best fix,

A code P0303 may mean that one or more of the following has happened:

  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
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1 Answer

Car keeps giving p0303 code.


Code P0303 means that there is a misfire detected on cylinder #3. This could becaused by anything from a worn out spark plug to a blown cylinder head gasket, a faulty fuel injector, a bad ignition coil, or a leaking intake manifold gasket. I have also seen this type of code caused by clogged-up EGR ports in the intake manifold on certain engines. "Freeze Frame Data" stored in your Engine computer along with the fault code is designed to help identify what engine conditions (high speed/slow speed, heavy load/light load, etc.) are producing the misfire. This helps a lot in identifying exactly what is causing the cylinder to misfire.

One way to eliminate some of the possible causes is to swap parts with another cylinder to see if the code changes.

If you have "Coil-On-Plug" ignition, you can swap the coil on #3 cylinder with the coil on #4 Cylinder and swap the #3 spark plug with the #2 spark plug. Then clear the codes and drive the car till the Check Engine (or Service Engine Soon) light comes back on.

If it still gives you P0303, then it is not being caused by the plug or the coil. It could be any of the other possible causes listed above.
If it now gives you P304, replace the bad ignition coil that is now on #4 cylinder.
If it now gives you P302, Then replacement of all the spark plugs is recommended.

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Consider replacing the Cylinder 3 Spark Plug. If that does not settle it,replace the wires too.

Good luck.

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