Engine Light ON (or Service Engine Soon Warning Light),Possible higher than usual fuel consumption
P0161 2011 FORD FUSION Possible Causes
Faulty Rear Heated Oxygen Sensor Bank 2,Rear Heated Oxygen Sensor Bank 2 harness is open or shorted,Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection,Inappropriate fuel pressure,Faulty fuel injectors,Intake air leaks,Exhaust gas leaks
P0161 2011 FORD FUSION Description
During testing the heated oxygen sensor (HO2S) heaters are checked for open and short circuits and excessive current draw. The test fails when the current draw exceeds a calibrated limit or an open or short circuit is detected.
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