P2195 - O2 Sensor Signal Biased/Stuck Lean - Bank 1, Sensor 1

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P2195 - O2 SENSOR SIGNAL BIASED/STUCK LEAN - BANK 1, SENSOR 1

Description:	A heated oxygen sensor (HO2S) indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.
Possible Causes:	Electrical: Short to VPWR in the harness or HO2S Water in the harness connector Open/shorted HO2S circuit Corrosion or incorrect harness connections Damaged HO2S Damaged powertrain control module (PCM) Fuel System: Excessive fuel pressure Leaking/contaminated fuel injectors Leaking fuel pressure regulator Low fuel pressure or running out of fuel Vapor recovery system Intake Air System: Air leaks after the mass air flow (MAF) sensor Vacuum leaks Positive crankcase ventilation (PCV) system Incorrectly seated engine oil dipstick EGR System: Leaking gasket Stuck EGR valve Leaking diaphragm or EGR vacuum regulator Base Engine: Oil overfill Camshaft timing Cylinder compression Exhaust leaks before or near the HO2S(s)
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	-	refer to PINPOINT TEST H .	refer to PINPOINT TEST H .