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Changed idle air control and o2 sensors. engine idles at

Customer Question
changed idle air control and...
changed idle air control and o2 sensors.
engine idles at 1800 rpm and 1000 in gear. can set idle down
Submitted: 2 years ago.Category: Hyundai
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11/8/2015
Hyundai Mechanic: internal88, Hyundai Mechanic replied 2 years ago
internal88
internal88, Hyundai Mechanic
Category: Hyundai
Satisfied Customers: 2,604
Experience: Over 10 years in the Import Auto industry. Engineering background and diagnostic is my specialty.
Verified

Hello, I'm Brandon - Hyundai tech.

Is the check engine light ON?

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Customer reply replied 2 years ago
no I have a code P0507 and p0421. changed idle air control, can it be bad?
Hyundai Mechanic: internal88, Hyundai Mechanic replied 2 years ago

But the P0421 is not fixed yet.

P0507 - is correct to replace the IAC.

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Hyundai Mechanic: internal88, Hyundai Mechanic replied 2 years ago

P0421 - 95% is the Catalytic Converter You will need to replace it to shut this light.

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Hyundai Mechanic: internal88, Hyundai Mechanic replied 2 years ago

5% is the exhaust manifold gasket.

It is recommend it to replace it a factory Hyundai part.

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Hyundai Mechanic: internal88, Hyundai Mechanic replied 2 years ago

I have experienced with this code in the Hyundai shop.

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Hyundai Mechanic: internal88, Hyundai Mechanic replied 2 years ago

you can check the iac by Ground the Orange/Black wire at the idle air control valve and see if the idle comes down. Check the resistance if the idle air control valve closing coil between terminals 2 and 1, to be 17 to 18.2 ohms, and the opening coil to be 15 to 16 ohms from terminal 2 to terminal 3.

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Hyundai Mechanic: internal88, Hyundai Mechanic replied 2 years ago

Please rate me positive for the prompt service, thank you!

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internal88
internal88
internal88, Hyundai Mechanic
Category: Hyundai
Satisfied Customers: 2,604
2,604 Satisfied Customers
Experience: Over 10 years in the Import Auto industry. Engineering background and diagnostic is my specialty.

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