Re: ML320 O2 sensors



Both side... you got two cats and 4 O2 sensors. Do not just replace the O2
sensor unless you got an OBD2 scanner to verify it is completely dead.

Alot of time when check engine code spit out O2 sensor... it is the MAF that
is bad once you verify that the O2 sensor is still working via the
diagnostic scanner.


.



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