DTC P0131 / P0132
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0131: O2 Sensor Circuit Low Voltage (Sensor 1) Output voltage of HO2S-1 circuit is lower than 0.06 V for 30 sec. even if output voltage of HO2S-2 circuit is higher than 0.6 V. (3 D/C detection logic) |
•HO2S-1 and/or its circuit
•ECM |
|
P0132: O2 Sensor Circuit High Voltage (Sensor 1) Output voltage of HO2S-1 circuit is higher than 1.27 V for 25 sec. (3 D/C detection logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B1: | HO2S-2 heater power supply circuit | 2. | HO2S-2 |
| A1: | HO2S-1 heater power supply circuit | B2: | HO2S-2 signal circuit | 3. | ECM |
| A2: | HO2S-1 signal circuit | B3: | HO2S-2 ground circuit | 4. | Shield wire |
| A3: | HO2S-1 ground circuit | B4: | HO2S-2 heater drive circuit | ||
| A4: | HO2S-1 heater drive circuit | 1. | HO2S-1 |
DTC Confirmation Procedure
P0131
NOTE:
•Check that the following condition is met in this “DTC Confirmation Procedure”.
—Battery voltage > 11 V
•Check that the following DTCs are not detected in this “DTC Confirmation Procedure”.
—HO2S-1 heater (P0030, P0031 and P0032)
—ECT sensor (P0116, P0117 and P0118)
—Fuel injector (P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270 and P0271)
—ECT sensor (P0116, P0117 and P0118)
—Fuel injector (P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270 and P0271)
1)Warm up engine to normal operating temperature.
2)Drive vehicle at 50 to 80 km/h (31 to 50 mile/h) constantly for 10 min. or more.
P0132
NOTE:
•Check that the following condition is met in this “DTC Confirmation Procedure”.
—Battery voltage > 11 V
•Check that the following DTCs are not detected in this “DTC Confirmation Procedure”.
—HO2S-1 heater (P0030, P0031 and P0032)
—Fuel injector (P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270 and P0271)
—Fuel injector (P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270 and P0271)
1)Warm up engine to normal operating temperature.
2)Drive vehicle at 50 to 80 km/h (31 to 50 mile/h) constantly for 10 min. or more.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
DTC check
Is there any DTC(s) other than P0131 and P0132?
|
Go to troubleshooting for applicable DTC.
|
Go to Step 3.
|
| 3 |
HO2S-1 signal circuit check
1)With ignition “OFF”, disconnect “C01” and “E01” connectors of ECM and HO2S-1 connector.
2)Check for proper terminal connection to “C01” and “E01” connectors and HO2S-1 connector.
3)If connections are OK, check the following points.
•Resistance of “A2” and “A3” circuits: less than 1 Ω
•Resistance between each of “A2” and “A3” circuits and ground: infinity •Resistance between “A2” circuit terminal and other terminal at HO2S-1 connector: infinity •Resistance between “A3” circuit terminal and other terminal at HO2S-1 connector: infinity •Voltage of “A2” and “A3” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 4.
|
Repair or replace defective wire harness.
|
| 4 |
DTC recheck
1)Replace HO2S-1.
2)Perform “DTC Confirmation Procedure” to check for DTCs.
Is DTC P0131 and/or P0132 still detected?
|
Replace ECM and recheck DTC.
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End.
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