DTC P0030 / P0031 / P0032 / P0053
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detection condition | Trouble area |
|---|---|
|
P0030: HO2S Heater Control Circuit (Sensor1) A/F sensor-1 heater drive circuit is open. (3 D/C detecting logic) |
•A/F sensor-1 heater and/or its circuit
•ECM |
|
P0031: HO2S Heater Control Circuit Low (Sensor1) A/F sensor-1 heater drive circuit is shorted to ground. (3 D/C detecting logic) |
|
|
P0032: HO2S Heater Control Circuit High (Sensor1) A/F sensor-1 heater drive circuit is shorted to power supply. (3 D/C detecting logic) |
|
|
P0053: HO2S Heater Resistance (Sensor1) Calculated A/F sensor-1 temperature is out of specified range. (3 D/C detecting logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a] | A3: | A/F sensor-1 signal circuit (IPN) | B2: | A/F sensor-1 heater drive circuit |
| A1: | A/F sensor-1 signal circuit (RT) | A4: | A/F sensor-1 signal circuit (RE+) | 1. | ECM |
| A2: | A/F sensor-1 signal circuit (APE) | B1: | A/F sensor-1 heater power supply circuit | 2. | A/F sensor-1 |
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
A/F sensor-1 heater circuit check
1)Check “B1” and “B2” circuits according to Step 1 and 2 of A/F Sensor-1 Check:D16AA.
Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
A/F sensor-1 heater check
1)Check A/F sensor-1 heater referring to “A/F Sensor Heater” under A/F Sensor On-Vehicle Inspection:D16AA.
Is check result OK?
|
Replace ECM and recheck DTC.
|
Replace A/F sensor-1.
|