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anit theft is activated. It should deactivate if you close all doors and hood and open with key or fob from outside of truck.
You must have opened a door by reaching inside and opening the door when it was locked. Once locked, it msut be unlocked with key or fob so the ouside lock sensor will tell the module it was unlocked porperly. Or, you have a bad door lock sensor switch.
Ford P1151 = Lack of heated oxygen sensor bank 2, sensor 1 switches, sensor indicates lean.
The oxygen sensor that is upstream of the catalytic converter on the exhaust side that covers the bank of cylinders that includes cylinder no. 2 (the even bank) is not switching rapidly enough from lean to rich. It is "stuck" on lean mode. It could be tested for proper operation and if it fails the tests, it should be replaced.
there are no codes that say replace O2 sensors,or remove converter,Thats just somebody's guessing,When it says O2 sensor that tells the mechanic to look for trouble in that area,wiring or faulty readings,And there are four O2 sensors.
Take your vehicle back to your mechanic, and have him perform a DRY, then a WET compression test. Please provide both readings back to me. In the meantime, ask him what it would cost you to him replace the piston rings. This is your problem. The 2 tests will simply verify me thinking.