DTC P0134
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0134: O2 Sensor Circuit No Activity Detected (Sensor 1) Output voltage of HO2S-1 circuit stays between 0.42 and 0.5 V for 25 sec. (3 D/C detection logic) |
•HO2S-1 and/ or its circuit
•HO2S-1 heater •Air intake system •Exhaust system •ECM |
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
WARNING:
If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.
•Select a level road with no traffic to minimize the risk of accident.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.
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 P0134?
|
Go to troubleshooting for applicable DTC.
|
Go to Step 3.
|
| 3 |
Exhaust system and air intake system check
1)Check exhaust system and air intake system for clogging or leakage.
Is check result OK?
|
Go to Step 4.
|
Repair or replace defective part.
|
| 4 |
HO2S-1 signal circuit check
1)Check “A2” and “A3” circuits according to Step 3 under DTC P0131 / P0132:M16A.
Is check result OK?
|
Go to Step 5.
|
Repair or replace defective wire harness.
|
| 5 |
HO2S-1 heater recheck
1)Check HO2S-1 heater.
2)Perform “DTC Confirmation Procedure” and check DTC.
Is check result OK?
|
Go to Step 6.
|
Replace HO2S-1.
|
| 6 |
DTC recheck
1)Replace HO2S-1.
2)Perform “DTC Confirmation Procedure” and check DTC.
Is DTC P0134 still detected?
|
Replace ECM and recheck DTC.
|
End.
|