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MBD	05-05-2008 07:24 PM

02 sensor?

How do you know if you need a 02 sensor? I replaced drivers side not long ago but continue to get secondary air code PO410 every 2 to 300 miles. Could I need passengers side also? w140 1999 S500 203K miles

Thanks
MB

platt-deutsch

05-05-2008 08:34 PM

Would secondary air code refer to the secondary air injection pump ?

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