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Old 11-30-2012, 10:34 PM   #2
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P2195- Lack of H2OS-11 switch, Sensor indicates lean.

Description: A HUGO sensor 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 colibrated amount of time.

Possible causes:

ELECTRICAL
Short to VPWR in harness or HO2S sensor
Water in harness connector
Open/Shorted HO2S circuit
Corrosion or poor mating terminals and wiring
Damaged HO2S sensor
Damaged PCM

FUEL SYSTEM
Excessive fuel pressure
Leaking fuel injectors
Leaking fuel regulator
Low fuel press or running out of fuel
Vapor recovery system

INDUCTION SYSTEM
Air leaks after MAF
Vacuum leaks
PCV system
Improper seated engine oil dipstick

EGR SYSTEM:
Leaking gasket
Stuck EGR valve
Leaking diaphrame or EVR

BASE ENGINE
Oil overfill
Cam timing
Cylinder compression
Exhaust leaks before or near HO2S sensor

Have you replaced the 02 sensor?
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