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re: Auto repair question re: mechanic diagnostic
Posted on 1/3/15 at 7:25 am to tt54l32v
Posted on 1/3/15 at 7:25 am to tt54l32v
quote:
Changed both 02 sensors. 138000 miles. Pretty sure it's the cat because the 02 sensor volTage on the rear is flucutting as much as the front sensor.
quote:
Bank 2 catalyst efficiency below threshold. You are dead on if the downstream switch as much as the the upstream then it has failed and will need to be replaced.
Yep
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