P0133
DTC P0133: HO2S Slow Response Bank 1 Sensor 1Wiring Diagram:
Circuit Description
The Engine Control Module (ECM) supplies a voltage of about 0.45 V between the ECM terminals K11 and K12. The Oxygen (O2) sensor varies the voltage within a range of about 1 V if the exhaust is rich, down to about 0.1 V if the exhaust is lean. The O2 sensor is like an open circuit and produces no voltage when it is below 300 degrees C (600 degrees F). An open O2 sensor circuit or a cold O2 sensor causes "Open Loop" operation.
Conditions for Setting the DTC
- Ignition ON.
- Engine Speed is between 512 and 4,608 rpm.
- The Mass Air Flow (MAF) is between 15 and 400 kg/h.
- Engine coolant temperature is greater than 50.25 degrees C (122.5 degrees F).
- Exhaust gas temperature is greater than 399.97 degrees C (751.9 degrees F).
- No relevant DTCs are set.
Action Taken When the DTC Sets
- The Malfunction Indicator Lamp (MIL) will illuminate.
- The ECM will record operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.
Conditions for Clearing the MIL/DTC
- The MIL will turn OFF at the end of 3 consecutive validation cycles in which the diagnostic runs without a fault.
- A history DTC will clear after 40 warm up cycles without a fault.
- DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
Normal scan tool voltage varies between 0.15 - 8.5 mV while in Closed Loop. If DTC P0133 is intermittent, refer to Intermittents. Intermittents
Step 1 - 13:
DTC Troubleshooting