Check Engine code PO 422 O2 sensor ?

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Check Engine code PO 422 O2 sensor ?

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Hyundai Forums >> Vehicle Line Up >> Hyundai Elantra >> Check Engine code PO 422 O2 sensor ?

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Check Engine code PO 422 O2 sensor ? - 12/26/2007 5:36:37 PM

itpphoto

Posts: 2
Joined: 12/26/2007
Status: offline

Hello everybody, my son's 2000 Elantra is showing a PO 422 code, which if I'm reading correctly is an O2 sensor. Anyone have any knowledge on which one, where it is located and how hard it is to change.

Thanks & Happy Holidays,

Frank

Post #: 1

RE: Check Engine code PO 422 O2 sensor ? - 12/26/2007 8:42:36 PM

madindian1

Posts: 268
Joined: 12/26/2007
Status: offline

i'm not really sure if p0422 is and o2 sensor code, i thinks it's a Catalytic code. Cat no good. there is a recall on cracked exhaust manifold. probably you can take in your car to the dealer have them check to see if it's cracked then they will replace your manifold for free.

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RE: Check Engine code PO 422 O2 sensor ? - 12/29/2007 2:42:30 PM

itpphoto

Posts: 2
Joined: 12/26/2007
Status: offline

Thanks for the reply

I rechecked the stored code and it is PO422, saying something like catalyst bank one temp.
I've looked all over the web with no luck, the only reference being to the O2 sensor.

Anybody else have an idea?

Thanks,
Frank

(in reply to madindian1)

Post #: 3

RE: Check Engine code PO 422 O2 sensor ? - 12/29/2007 7:50:41 PM

madindian1

Posts: 268
Joined: 12/26/2007
Status: offline

p0422 is a catalyst efficiency code. if you had a scan tool you could monitor the o2 sensors and you would notice that the rear sensor the one after the cat is the same(working) as the one before it. the second/rear sensor monitors cat efficiency. when that o2 sensor is reading the same as the front sensor that means the catalytic converter is not cleaning the air. that's what it is, the cat is no good.

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if i'm not doing **** at work i will help you

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