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Home >> Pontiac >> 2007 >> Vibe Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - DTC P0134 To DTC P0451 >> DTC P0136 >> Test Description

Test Description

The numbers below refer to the step numbers in 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 is a high input condition.
  3. 3:  This step determines if the DTC P0136 is the result of a hard failure or an intermittent condition.
  4. 4:  In this step the DMM is used as a low current voltage source taking the place of the HO2S. If the HO2S 2 input circuit and the PCM are good, the scan tool will display approximately 1,275 mV.
DTC P0136

Step Action Values 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. Turn ON the ignition, with the engine OFF.
  2. Observe the heated oxygen sensor (HO2S) 2 voltage with a scan tool.
Is the voltage more than the specified value?		 1050 mV Go to Step 7  Go to Step 3 
3 
  1. Perform the scan tool Clear DTC Information function.
  2. Place the vehicle into Check mode, using the scan tool. Refer to Service Bay Test .
  3. Operate the vehicle within the Freeze Frame conditions, as noted.
Does DTC P0136 set?		 - Go to Step 4  Go to Diagnostic Aids
4 
  1. Disconnect the HO2S 2 electrical connector located behind the front floor console. Refer to Heated Oxygen Sensor 2 Replacement .
  2. Turn ON the ignition, with the engine OFF.
  3. Set a DMM to measure DC millivolts.
  4. Place the positive lead of the DMM on battery positive voltage, and the negative lead on the HO2S 2 sensor input circuit terminal (body harness side).
  5. Observe the HO2S 2 scan tool parameter.
Is the voltage more than the specified value?		 1125 mV Go to Step 5  Go to Step 6 
5
  1. Connect a test lamp to battery voltage.
  2. Probe the HO2S 2 sensor ground circuit terminal at the HO2S connector on the body harness side.
Does the test lamp illuminate?		 - Go to Step 10  Go to Step 9 
6
  1. Test for an open or short in the HO2S 2 input circuit between the HO2S 2 and the powertrain control module (PCM). Refer to Circuit Testing .
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 12  Go to Step 11 
7
  1. Disconnect the HO2S 2 electrical connector located behind the front floor console. Refer to Heated Oxygen Sensor 2 Replacement .
  2. Turn ON the ignition, with the engine OFF.
Is the voltage at the specified value?		 35-55 mV Go to Step 10  Go to Step 8 
8
  1. Test for a short to voltage in the HO2S 2 input circuit. Refer to Circuit Testing .
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 12  Go to Step 11 
9 Repair the open in the HO2S 2 ground circuit. Refer to Wiring Repairs .
Did you complete the repair?		 - Go to Step 12  -
10 Replace the HO2S 2. Refer to Heated Oxygen Sensor 2 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. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text.
Does the DTC run and pass?		 - Go to Step 13  Go to Step 2 
13 With a scan tool, observe the stored information, Capture Info.
Does the scan tool display any DTCs that you have not diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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