DTC P2195: A/F / O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 [11/2021 - ]: Procedure

1. Turn the ignition switch to OFF.
2. Check the air fuel ratio sensor connector.

   Has water entered the connector?

   Result	Proceed to
   Yes (Completely remove any water inside.)	A
   No	B

Result: 

A 

COMPLETELY REMOVE ANY WATER INSIDE 

Result: 

B 

See step  2

1. Disconnect the connector from ECM.
2. Measure the resistance between the ECM connector and engine ground.

   Connector & terminal

   B1-3 (AFR+) - Engine ground

   B1-4 (AFR-) - Engine ground

   Is the resistance 1 MΩ or more?

   Result	Proceed to
   Yes	A
   No (Repair the short circuit to ground in harness between ECM connector and air fuel ratio sensor connector.)	B

Result: 

B 

REPAIR HARNESS OR CONNECTOR 

Result: 

A 

See step  3

1. Disconnect the connector from ECM.
2. Turn the ignition switch to ON.
3. Measure the voltage between ECM connector and engine ground.

   Connector & terminal

   B1-3 (AFR+) - Engine ground

   Is the voltage 4.5 V or higher?

   Result	Proceed to
   Yes	A
   No	B

Result: 

A 

See step  5

Result: 

B 

See step  4

1. Measure the voltage between ECM connector and engine ground.

   Connector & terminal

   B1-4 (AFR-) - Engine ground

   Is the voltage 4.95 V or higher?

   Result	Proceed to
   Yes	A
   No (Replace the air fuel ratio sensor.)	B

Result: 

B 

REPLACE AIR FUEL RATIO SENSOR. Refer to  REMOVAL [11/2021 - ] 

Result: 

A 

See step  5

1. Measure the voltage between ECM connector and engine ground.

   Connector & terminal

   B1-3 (AFR+) - Engine ground

   B1-4 (AFR-) - Engine ground

   Is the voltage 8 V or higher?

   Result	Proceed to
   Yes (Repair the short circuit to power in the harness between ECM connector and air fuel ratio sensor connector. After repair, replace the ECM.)	A
   No (Repair the poor contact of ECM connector.)	B

Result: 

B 

REPAIR CONNECTOR 

Result: 

A 

See step  6

1. Repair the ground short circuit of harness between ECM connector and air fuel ratio sensor connector.

   Replace the ECM if defective.

   Result	Proceed to
   Yes	A
   No	B

Result: 

A 

REPLACE ECM. Refer to  REMOVAL [11/2021 - ] 

Result: 

B 

END