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DTC Troubleshooting

DIAGNOSIS PROCEDURE - DTC P0154 HO2S BANK 2 SENSOR 1 NO ACTIVITY DETECTED

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD) System Check.
Is the system check complete?		 - Go to Step 2. Go to "ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK ".
2
  1. Run the engine to above the specified operating temperature.
  2. Install a scan tool.
  3. Operate the engine above the specified rpm for 2 minuets.

Does the scan tool the indicate Closed Loop?		 80 °C (176 °F) 1,200 rpm Go to Step 3. Go to Step 4.
3
  1. Turn the Turn the ignition switch to ON.
  2. Review the Freeze Frame data and note the parameters.
  3. Operate the vehicle within the Freeze Frame conditions and Conditions for Setting the DTC as noted?

Does the scan tool the indicate Closed Loop?		 - Go to Step 12. Go to Step 4.
4 Disconnect the Heated 02 sensor connector and jumper the Heated 02 sensor low circuit, terminal 4 to ground.
Is the H02 voltage below the specified value and does the scan tool indicate the heated oxygen sensor heater voltage within the specified value?		 0.5 V Go to Step 5. Go to Step 6.
5 Check the Heated 02 sensor connector for malfunction terminals or poor connection and repair as necessary.
Is repair necessary?		 - Go to Step 12. Go to Step 9.
6
  1. Turn the ignition switch to ON.
  2. Remove the jumper wire.
  3. Using a digital voltmeter (DVM), measure the voltage between the Heated 02 sensor signal circuit, terminal 3 to ground.

Does the Heated 02 sensor voltage measure above the specified value?		 0.6 V Go to Step 10. Go to Step 9.
7 Does the Heated 02 sensor voltage measure below the specified value? 0.3 V Go to Step 11. Go to Step 8.
8 Check the Heated O2 sensor ground circuit, terminal 4 for an open or poor connection and repair as necessary.
Is repair necessary?		 - Go to Step 12. Go to Step 8.
9 Check the Heated 02 sensor signal circuit, terminal 3 for an open or poor connection and repair as necessary.
Is repair necessary?		 - Go to Step 12. Go to Step 8.
10
  1. If disconnected, reconnect Heated 02 sensor connector.
  2. Using the scan tool, clear the DTCs.
  3. Start the engine and idle at normal operating temperature.
  4. Operate the vehicle within the conditions for setting this DTC as specified in the supporting text.

Does the scan tool indicated that this diagnostic has run and passed?		 - Go to Step 13. Go to Step 2.
11
  1. Turn the ignition switch to LOCK.
  2. Replace the Heated 02 sensor.
  3. Road tests the vehicle.
  4. Perform the diagnostic system check.

Is the replacement complete?		 - Go to Step 15. -
12
  1. Turn the ignition switch to LOCK.
  2. Replace the ECM.
  3. Road tests the vehicle.
  4. Perform the diagnostic system check.

Is the replacement complete?		 - Go to Step 15. -
13 Check if any additional DTCs are set.
Are any DTCs displaced that have not been diagnosed?		 - Go to applicable DTC TABLE . System OK
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