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Check engine light with codes P2195 and P2197?

The check engine light comes on because the computer misinterprets the O2 input. You need to have the PCM software updated.

The details for both the OBD error codes are as follows :----


P2195 - Lack of HO2S-11 Switch, Sensor Indicates Lean

A HEGO 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 calibrated amount of time.

Electrical:
Short to VPWR in harness or HO2S
Water in harness connector
Open/Shorted HO2S circuit
Corrosion or poor mating terminals and wiring
Damaged HO2S
Damaged 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
Induction System:
Air leaks after the MAF
Vacuum Leaks
PCV system
Improperly seated engine oil dipstick
EGR System:
Leaking gasket
Stuck EGR valve
Leaking diaphragm or EVR
Base Engine:
Oil overfill
Cam timing
Cylinder compression
Exhaust leaks before or near the HO2S(s)

____________________________________________________

P2197 - Lack of HO2S-21 Switch, Sensor Indicates Lean

A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when fuel control system no longer detects switching for a calibrated amount of time.

These codes mean you have lean codes on both sides of the engine most likely caused by a vacuum leak. If it is a large leak you will hear a hissing noise while idleing. To find small vacuum leaks while running spray carb cleaner around the intake and all the vacuum lines attached to the intake the full length of the hoses. A vacuum leak can start any where after the MAF to the cylinders.

Once repaired the vehicle will need to be cleared of faults by removing the negative battery cable for 15 minutes.

This details will help.
Thanks.

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