O2 sensor bank2 sensor 2
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Tuned
Joined: Mar 2011
Posts: 410
Likes: 6
From: Proctorsville VT
O2 sensor bank2 sensor 2
Confirmed code PO157 and pending code PO056 on a 2017 3.5l F150 at 50,300 miles. Yesterday the engine was skipping a little on a cold start at high idle and then hunted between 8000 and 12000 rpm.
Any member have experience with this condition and repair?
Any member have experience with this condition and repair?
Lead Driver
Joined: May 2015
Posts: 5,871
Likes: 357
From: Mts. S. of San Francisco
We had an O2 sensor "fail" several years ago. As it happened, it was not actually the sensor, but a rodent had gotten to it and chewed off the wires. Right down to the sensor itself. It was an expensive repair for such a simple problem.
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Tuned
Joined: Mar 2011
Posts: 410
Likes: 6
From: Proctorsville VT
Looks like the bank 2 sensor 2 is on the driver's side, rearward of the cat and accessible. Hopefully road salt hasn't frozen the thing solid.
I did see online that one cause of O2 failure is contamination due to dirty air filter. This truck is typically driven on dusty rural roads so an air filter inspection/change is overdue anyway.
Will report on what I find.
Thread Starter
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Tuned
Joined: Mar 2011
Posts: 410
Likes: 6
From: Proctorsville VT
Air filter was clean and I bet the sensor itself will also be. The driver- aft sensor wire shows damage from contact with the forward driveshaft. Source of MIL identified.
Size of sensor is ⅞'' measured with an open end wrench.
Hope this helps somebody some day.
Size of sensor is ⅞'' measured with an open end wrench.
Hope this helps somebody some day.
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mizzourover
2009 - 2014 F150
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Apr 14, 2015 09:28 AM
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