DTC P013A: O2 Sensor Slow Response - Rich To Lean Bank 1 Sensor 2: Notes
DTC detecting condition:
Detected when two consecutive driving cycles with fault occur.
- After servicing or replacing faulty parts, perform Clear Memory Mode Refer to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>CLEAR MEMORY MODE>OPERATION , and inspection mode Refer to ENGINE (DIAGNOSTICS) (EXCEPT FOR STI)>INSPECTION MODE>PROCEDURE ..
- Use the check board when measuring the ECM terminal voltage and resistance.
Wiring diagram:
Engine Electrical System Refer to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM>WIRING DIAGRAM .
- CHECK HARNESS BETWEEN ECM AND REAR OXYGEN SENSOR CONNECTOR.
- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Disconnect the connector from rear oxygen sensor.
- Measure the resistance of harness between ECM connector and rear oxygen sensor connector.
Connector & terminal
(E158) No. 16 - (E25) No. 4:
Is the resistance less than 1 Ω?
Yes: Go to 2.
No: Repair the open circuit of harness between ECM connector and rear oxygen sensor connector.
- CHECK HARNESS BETWEEN ECM AND REAR OXYGEN SENSOR CONNECTOR.
Measure the resistance between rear oxygen sensor connector and engine ground.
Connector & terminal
(E25) No. 4 - Engine ground:
Is the resistance 1 MΩ or more?
Yes: Go to 3.
No: Repair the short circuit to ground in harness between ECM connector and rear oxygen sensor connector.
- CHECK REAR OXYGEN SENSOR.
Measure the resistance between rear oxygen sensor terminals.
Terminals
No. 3 - No. 4
Is the resistance less than 1 Ω?
Yes: Replace the rear oxygen sensor. Refer to FUEL INJECTION (FUEL SYSTEMS) (EXCEPT FOR STI)>REAR OXYGEN SENSOR .
No: Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.