Conditions for Clearing the MIL/DTC

The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.

DTC P0133

Step	Action	Values	Yes	No
Schematic Reference: Engine Controls Schematics Connect End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	IMPORTANT: If any other DTCs are set, refer to the other DTCs before proceeding with this table. Are any other DTCs set?	-	Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information	Go to Step 3
3	Operate the engine at normal operating temperature. Operate the engine above 1,200 RPM for 2 minutes. Observe the heated oxygen sensor (HO2S) 1 voltage parameter with a scan tool. Does the scan tool indicate that the heated oxygen sensor (HO2S) 1 voltage is varying above and below the specified values?	350-650 mV	Go to Step 4	Go to Step 5
4	Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	-	Go to Step 5	Go to Intermittent Conditions
5	IMPORTANT: Before replacing the HO2S, locate and correct any source of contamination. Inspect for the following conditions: The use of incorrect silicon RTV sealant Fuel contamination An exhaust leak- Refer to Exhaust Leakage in Engine Exhaust. The HO2S is installed correctly Replace the HO2S 1. Refer to Heated Oxygen Sensor (HO2S) Replacement (Bank 1) or Heated Oxygen Sensor (HO2S) Replacement (Bank 2) . Did you complete the replacement?	-	Go to Step 6	-
6	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	-	Go to Step 2	Go to Step 7
7	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information	System OK