DTC P0133
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0133: O2 Sensor Circuit Slow Response (Sensor 1) Signal response time from rich to lean and lean to rich is longer than specified time. (3 D/C detection logic) |
•HO2S-1 and/or its circuit
•HO2S-1 heater •Air intake system •Exhaust system •Fuel 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 using 2 persons, a driver and a tester.
•Perform the test extremely carefully.
•Perform the road test using 2 persons, a driver and a tester.
NOTE:
•Check that the following condition is met in this “DTC Confirmation Procedure”.
—A/F feedback (closed loop) control is activated.
•Check that the following DTCs are not detected in this “DTC Confirmation Procedure”.
—MAP sensor (P0107 and P0108)
—MAF sensor (P0102 and P0103)
—IAT sensor-1 (P0112 and P0113)
—Cylinder misfire detected (P0300)
—ECT sensor (P0116, P0117 and P0118)
—HO2S-2 (P0137, P0138, P0140 and P2271)
—EVAP canister purge valve (P0443, P0458 and P0459)
—MAF sensor (P0102 and P0103)
—IAT sensor-1 (P0112 and P0113)
—Cylinder misfire detected (P0300)
—ECT sensor (P0116, P0117 and P0118)
—HO2S-2 (P0137, P0138, P0140 and P2271)
—EVAP canister purge valve (P0443, P0458 and P0459)
1)Warm up engine to normal operating temperature.
2)With engine speed at 1,300 to 3,500 rpm, drive vehicle at 50 to 80 km/h (31 to 50 mile/h) for 5 min.
3)Release accelerator pedal, and keep vehicle coasting for 10 sec. in engine braking condition. (Fuel cut)
4)Check whether O2 sensor readiness / monitoring test has completed or not using scan tool. If O2 sensor readiness / monitoring test has not completed, check vehicle conditions (environmental) and repeat Step 2) – 4).
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 P0133?
|
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 |
Fuel system inspection
1)Check fuel system according to Fuel System Inspection:K14C.
Is check result OK?
|
Go to Step 5.
|
Repair or replace defective part.
|
| 5 |
HO2S-1 signal circuit check
1)Check “A2” and “A3” circuits according to Step 3 under DTC P0131 / P0132:K14C.
Is check result OK?
|
Go to Step 6.
|
Repair or replace defective wire harness.
|
| 6 |
HO2S-1 heater check
1)Check HO2S-1 heater.
Is check result OK?
|
Go to Step 7.
|
Replace HO2S-1.
|
| 7 |
DTC recheck
1)Replace HO2S-1.
2)Perform “DTC Confirmation Procedure” and check DTC.
Is DTC P0133 still detected?
|
Replace ECM and recheck DTC.
|
End.
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