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Test Description

WARNING: This page is about a different variant/trim than selected.

The number below refers to the step number on the diagnostic table.

  1. 2:  If the voltage is varying above and below the specified value, the condition is not present.
DTC P0133

Step Action Value(s) Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Control Module (ECM) 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
2 
IMPORTANT: If DTC P0030 or P0135 is set, diagnose those DTCs first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  1. Start the engine.
  2. Allow the engine to reach operating temperature. Refer to Scan Tool Data List .
  3. Operate the engine at 1,500 RPM for 30 seconds.
  4. Observe the HO2S 1 parameter with a scan tool.
Is the HO2S 1 parameter varying above and below the specified range?		 450-650 mV Go to Step 3  Go to Step 4 
3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. 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 4  Go to Intermittent Conditions
4
  1. Turn OFF the ignition.
  2. Disconnect the heated oxygen sensor (HO2S) 1.
  3. Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and a good ground.
  4. Turn ON the ignition, with the engine OFF.
  5. Observe the HO2S 1 parameter with a scan tool.
Is the HO2S 1 parameter less than the specified value?		 100 mV Go to Step 6  Go to Step 5 
5 Test the HO2S 1 high signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 12  Go to Step 9 
6
  1. Remove the jumper wire from the previous step.
  2. Connect a 3-amp fused jumper wire between the high signal circuit of the HO2S 1 harness connector on the engine harness side and the low signal circuit of the HO2S 1 harness connector on the engine harness side.
  3. Observe the HO2S 1 parameter with a scan tool.
Is the HO2S 1 parameter less than the specified value?		 100 mV Go to Step 8  Go to Step 7 
7 Test the HO2S 1 low signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 12  Go to Step 9 
8 Test for shorted terminals and for poor connections at the HO2S 1. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs s.
Did you find and correct the condition?		 - Go to Step 12  Go to Step 10 
9 Test for shorted terminals and for poor connections at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 12  Go to Step 11 
10
NOTE: Refer to Silicon Contamination of Heated Oxygen Sensors Notice in Cautions and Notices.
    IMPORTANT: The HO2S 1 may be damaged due to contamination.
  1. Prior to replacing the HO2S, inspect for the following sources of contamination:
  2. Replace the HO2S 1. Refer to Heated Oxygen Sensor Replacement - Position 1 .
Did you complete the replacement?		 - Go to Step 12  -
11 Replace the ECM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 12  -
12
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. 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 13 
13 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 System OK
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