Trouble code P0422 Main Catalyst,Bank1 Below Threshold

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Trouble code P0422 Main Catalyst,Bank1 Below Threshold

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02-12-2009, 10:51 AM

Dimitris

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Join Date: Sep 2008

Posts: 18

Trouble code P0422 Main Catalyst,Bank1 Below Threshold

I got this code on my 98 SL500. I recently replaced the catalytic converter on the driver side and the pre cat oxygen sensor.OEM parts. Is this code oxygen sensor related or catalytic converter. Im a bit lost on what is wrong here and what it should be replaced. Thanks for reading

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