P0031

DTC P0031 / P0032

DTC Detecting Condition and Trouble Area






Circuit Diagram










DTC Confirmation Procedure

P0031

1) Push engine switch to change ignition mode to "ON" and leave ignition mode in "ON" for 10 sec.

P0032

2) Run engine at idle speed for 1 min.

DTC Troubleshooting



1. Was "Engine and Emission Control System Check" performed?
YES
Go to Step 2.
NO
Go to Engine and Emission Control System Check Engine and Emission Control System Check.
2. A/F sensor heater power supply circuit check
Confirm that ignition mode of keyless push start system is in "OFF".
Disconnect connector from A/F sensor.
Check for proper terminal connection to A/F sensor.
If connections are OK, push engine switch to change ignition mode to "ON".
Check that "A1" circuit is battery voltage.
Is it in good condition?
YES
Go to Step 3.
NO
Repair or replace defective parts or wire harness.
3. A/F sensor heater drive circuit check
Push engine switch to change ignition mode to "OFF".
Disconnect "C01" and "E01" connectors.
Check for proper terminal connection to ECM connectors.
If connections are OK, check the following points.
Resistance of "A2" circuit: less than 1
Resistance between "A2" circuit and ground: infinity
Resistance between "A2" circuit terminal and each terminal at A/F sensor connector: infinity
Voltage of "A2" circuit: 0 - 1 V (with ignition mode of keyless push start system in "ON")
Are they in good condition?
YES
Go to Step 4.
NO
Repair or replace defective wire harness.
4. A/F sensor check
Check A/F sensor heater. A/F Sensor On-Vehicle Inspection
Is it in good condition?
YES
Replace ECM and recheck DTC. Service and Repair
NO
Replace A/F sensor. Service and Repair