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Home >> Suzuki >> 2006 >> Verona Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0030 Through P0175 >> DTC P0139: HO2S Slow Response Bank 1 Sensor 2 >> DTC Troubleshooting
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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

Step Action Value (s) Yes No
1 Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK .
Is the system check complete?		 - Go to Step 2. Go to ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK .
2
  1. Connect the scan tool to the Data Link Connector (DLC).
  2. Run the engine until it reaches operating temperature.
  3. Check for the Closed Loop operation.

Does the scan tool indicate the Closed Loop?		 - Go to Step 3. Go to Step 4.
3
  1. Turn the ignition switch to LOCK.
  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.

Does the scan tool indicate the Closed Loop?		 - Go to Step 12. Go to Step 4.
4
  1. Disconnect the HO2S connector.
  2. Jumper the oxygen sensor connector terminal 1 to ground.
  3. Turn the ignition switch to ON.

Does the scan tool read the oxygen sensor signal voltage the specified valve?		 0.4 - 0.5 V Go to Step 5. Go to Step 8.
5 Check the oxygen sensor connector for malfunction terminals or poor connection and repair as necessary.
Is repair necessary?		 - Go to Step 12. Go to Step 6.
6
  1. Run the engine at idle.
  2. Remove the jumper wire.
  3. Measure the voltage between the oxygen sensor connector terminal 4 and ground.

Does the oxygen sensor voltage measure above the specified value?		 0.6 V Go to Step 7. Go to Step 11.
7
  1. Turn the ignition switch to LOCK.
  2. Measure the voltage between the HO2S connector terminal 4 and ground.

Does the oxygen sensor voltage measure above the specified value?		 0.3 V Go to Step 9. Go to Step 11.
8 Repair the wire or the connector between the HO2S terminal 1 and the Engine Control Module (ECM) terminal K10 is open or a short to ground.
Is the repair complete?		 - Go to Step 11. Go to Step 9.
9 Repair the wire and the connector terminal between the oxygen sensor connector terminal 4 and the ECM connector terminal K94 is open or a short to ground.
Is the repair complete?		 - Go to Step 12. Go to Step 10.
10
  1. Turn the ignition switch to LOCK.
  2. Replace the ECM.
  3. Perform the DIAGNOSTIC SYSTEM CHECK .

Is the repair complete?		 - System OK -
11 Replace the O2 sensor.
Is the repair complete?		 - Go to Step 12. -
12
  1. Clear any DTCs from the ECM.
  2. Perform the DIAGNOSTIC SYSTEM CHECK .

Is the repair complete.		 - Go to Step 13. -
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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