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Old 11-02-2012, 03:37 PM
ExpensiveToys ExpensiveToys is offline
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If I remember correctly bank 1 is drivers side, so sensor 1/bank 1 would be O2 sensor on drivers side just to front of catalytic converter.

Only thing I could think of would be that the mechanics disconnected something to get better access, and failed to get it reconnected. But can't think of what they would have needed to disconnect to just change the oil that would effect the O2 sensor on drivers side.

Would recommend giving whoever did the work a call and see if they failed to get something hooked back up.
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