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P0156 Diagnostic Trouble Code Discussion for March 2013

Heated Oxygen Sensor (Bank 2 Sensor 2) Closed Loop Fuel Control

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Trouble Ticket Help Requests for DTC P0156
Help Request Posted
2000 Ford Expedition XLT 5.4L Poor Idle Quality, Hesitation VIN: 1FMPU16L7Y
P0156: testing and results. having code po174 and po156, both relating to bank 2. ive checked for vacuum leaks with a smoke machine, i also removed the elbow behind the iac to look visually for a cracked line. cannot seeem to find any vacuum leaks.
March 21, 2013