DTC P013A: O2 Sensor Slow Response - Rich To Lean Bank 1 Sensor 2: Notes
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DTC detecting condition:
Detected when two consecutive driving cycles with fault occur.
Wiring diagram:
Engine Electrical System. Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>ENGINE ELECTRICAL SYSTEM .
CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO (HEV))>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .
- CHECK HARNESS BETWEEN ECM AND REAR OXYGEN SENSOR (OPEN)
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- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Disconnect the connector from the rear oxygen sensor.
- Measure the resistance of harness between ECM connector and rear oxygen sensor connector.
Connector & terminal
(B134) No. 33 - (B19) No. 3:
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 (SHORT TO GROUND)
.
Measure the resistance between rear oxygen sensor connector and engine ground.
Connector & terminal
(B19) No. 3 - 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.
Terminal
No. 3 - No. 4
Is the resistance less than 1 Ω?
Yes : Replace the rear oxygen sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (HEV))>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.