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Home >> Pontiac >> 2007 >> Vibe Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - DTC P0010 To DTC P0128 >> DTC P0032 >> Test Description
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Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 1:  The Diagnostic System Check - Vehicle prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
  2. 2:  This step checks whether the malfunction that caused the DTC P0032 is still present. Operating the vehicle in check mode enhances the diagnostic capabilities of the PCM. The HO2S Heater diagnostic can be monitored on the scan tool under the I/M System Information selection of System Information. When the HO2S Heater test displays a YES status, indicating that the oxygen sensor heater diagnostic is completed, check for a DTC P0032 in the Last Test Failed screen of the scan tool. If there is no DTC P0032 displayed the HO2S heater diagnostic has run and passed, indicating that no malfunction was present this time. The DTCs MUST be cleared in order to view the Current Status of the system diagnostics being performed. Do not forget that I/M System Information tests only indicate that the test has run, not whether the test passed or failed. The Last Test Failed screen must be checked for related DTCs in order to determine the outcome of the diagnostic test involved. For additional information on check mode operation refer to Powertrain Control Module Diagnosis.
  3. 4:  This step tests the heater control circuit of the HO2S 1 for a short to voltage. If the test lamp illuminates, this indicates a short to voltage on the heater control circuit.
  4. 5:  This step isolates the condition. Review the system mechanization. If the test lamp still illuminates after the PCM is disconnected, repair the short to an ignition voltage source. If the test lamp does not illuminate, test for a short between the heater control circuit and any other circuit powered by the PCM that run together inside the same harness.
  5. 7:  Inspect the HO2S 1 connectors for water intrusion, corrosion, and bent or damaged terminals.
  6. 8:  Inspect the PCM connectors for water intrusion, corrosion, and bent or damaged terminals.
DTC P0032

Step Action Value Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Powertrain Control Module 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 
  1. Perform the scan tool Clear DTC Information function.
  2. Operate the vehicle within the Conditions for Running the DTC or until the heated oxygen sensor (HO2S) heater test is complete. Review the supporting text.
Did a DTC P0032 set?		 - Go to Step 3  Go to Diagnostic Aids
3
  1. Turn OFF the ignition.
  2. Disconnect the HO2S 1 connector.
  3. Measure the resistance of the HO2S 1, between the heater control and the ignition voltage circuits, with a DMM.
Is the resistance of the sensor within the specified range?		 1.8-3.4 Ω at 20°C (68°F) Go to Step 4  Go to Step 10 
4 
  1. Turn ON the ignition, with the engine OFF.
  2. Probe the heater control circuit of the HO2S 1 with a test lamp connected to a good ground.
Does the test lamp illuminate?		 - Go to Step 5  Go to Step 7 
5 
  1. Turn OFF the ignition.
  2. Disconnect the powertrain control module (PCM).
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the heater control circuit of the HO2S 1 with a test lamp connected to a good ground.
Does the test lamp illuminate?		 - Go to Step 9  Go to Step 6 
6 Test for a short to a voltage between heater control circuit of the HO2S 1 and another PCM circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 12  Go to Step 8 
7  Test for shorted terminals and for poor connections at the HO2S 1. 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 10 
8  Test for shorted terminals and for poor connections at the PCM. 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 
9 Repair the short to voltage in the heater control circuit of the HO2S 1. Refer to Wiring Repairs .
Did you complete the repair?		 - Go to Step 12  -
10 Replace the HO2S 1. Refer to Heated Oxygen Sensor 1 Replacement .
Did you complete the replacement?		 - Go to Step 12  -
11 Replace the PCM. 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.
Does the DTC run and pass?		 - Go to Step 13  Go to Step 2 
13 Observe the Capture Info with a scan tool.
Are there any DTCs that you have not diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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