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Old 06-22-2014, 11:34 PM
97 SL320 97 SL320 is offline
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Join Date: Jan 2012
Posts: 7,534
Small update.

Changed front and rear sensors. ( you can use a rear sensor for the front, the only difference is the wire length )

So far the rear O2 sensor code has not come back.

The AIR readyness test has not completed, getting a P0410 in the pending code list after clearing all codes.

Put a vacuum pump on the diverter valve control, the diaphragm holds vac. Put a vac gauge inline, ran engine and getting vac when the AIR pump is running. Next step is to clean screen on AIR pump, remove outlet hose and feel for flow, pump air into diverter valve while using vac to hold the valve open and judge restriction.
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