DTC P0134: A/F / O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 [11/2021 - ]: Procedure

1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Disconnect the connector from the air fuel ratio sensor.
4. Measure the resistance of harness between ECM connector and air fuel ratio sensor connector.

   Connector & terminal

   B1-3 (AFR+) - B13-3

   B1-4 (AFR-) - B13-4

   Is the resistance less than 1 Ω?

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

Result: 

B 

REPAIR HARNESS 

Result: 

A 

See step  2

1. Check for poor contact of ECM and air fuel ratio sensor connector.

   Is there poor contact of ECM or air fuel ratio sensor connector?

   Result	Proceed to
   Yes (Repair the poor contact of ECM or air fuel ratio sensor connector.)	A
   No (Check the air fuel ratio sensor.)	B

Result: 

A 

REPAIR CONNECTOR 

Result: 

B 

CHECK AIR FUEL RATIO SENSOR 

Refer to INSPECTION [11/2021 - ]