Question about 2005 Hyundai Sonata

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2005 Hyundai Sonata GLS, 2.7L, how much anti freeze, and how to flush the system?

Whats the best way to flush this car? I already found what type of antifreeze to use. I read there are drain plugs on the engine bock. Any assistance would be helpful.

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  • Eric Jacques
    Eric Jacques Nov 02, 2012

    More replies please.

  • Eric Jacques
    Eric Jacques Nov 03, 2012

    not enough info

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  • Expert
  • 34 Answers

Well is not in the block is in the batton of the radiator, just make sure if the drain valve isnot too stock becarefull how to brake it loose because is a plastic valve and try to get extended life antifreeze for you coolant system

Posted on Nov 02, 2012

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

dealt_soul
  • 296 Answers

SOURCE: 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

Posted on Jan 19, 2009

  • 548 Answers

SOURCE: How to replace a serpentine belt for a hyundai

try joining autozone.com for free and they have all your diagram needs for free

Posted on Sep 05, 2009

  • 62 Answers

SOURCE: 2005 hyundai sonata oil light flickers. oil

Yes there is a sensor located on the front of engine on the transmission side(single wire). It cannot be "reset". Possibly loose connection at the sensor,or a faulty sensor, OR... you could be losing oil pressure inside the engine somewhere(lets hope not) these engines are designed to run on very low oil pressure compared to cars of days gone by. The sonata 4 cylinder runs about only 12 psi. The V6 is 7.6 psi or more.
So if it is an oil pressure issue it is extremely important not to run the car before it is fixed or you will need an entire engine.

Posted on Jan 27, 2010

ZJLimited
  • 17970 Answers

SOURCE: need fil for error code P2626 Hyundai Elantra GLS

P2626 O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 1)

I'll sure this has to do with a faulty O2 sensor. This sensor is usually located around the header of your car, or down more on your exhaust.

Try disconnecting your battery for 30 mins, hook it back up, and start your car again. This will erase the error. See if it comes in again.

Hope this help (remember rated this post).

Posted on Mar 25, 2010

  • 417 Answers

SOURCE: Hyundai Sonata 2006 - Check Engine light came on.

"Fuel system too lean at idle". It's an air/fuel ratio that is not correct, possibly a vacuum leak somewhere. Or a leaky exhaust pipe. Could be related to intake manifold gasket. Somewhere, air is getting into the engine.

I suggest taking it back to the dealer under warranty. I think Hyundai is 10yr./100k for the original owner. 5yr./50k if not. Ask first if covered, and ask why not id not covered.

Posted on Apr 10, 2010

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