Heated oxygen sensor (H02S) 1, bank 2 not switching, fuel trim (FT) weak mixture Wiring, intake/fuel system, H02S, EGR system, oil level, camshaft timing, cylinder compression, ECM P1152

Asked by May 06, 2017 at 10:13 PM about the 2003 Mercury Sable GS Sedan FWD

Question type: Maintenance & Repair

My engine light came on and the code that came
up was in 1151 what could be the issue

1 Answer

85,515

P1151 MERCURY - Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2...Possible causes: Faulty Upstream Oxygen Sensor Bank 2, Fuel pressure high or low, MAF sensor dirty/defective, Vacuum leak on engine, Leaking fuel injector or fuel pressure regulator, Faulty Powertrain Control Module (PCM)...Here is a video on this... https://youtu.be/vt5cwKMj9d4

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