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Home >> Suzuki >> 2006 >> Verona Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0030 Through P0175 >> DTC P0134: HO2S Circuit Insufficient Activity Bank 1 Sensor 1 >> DTC Troubleshooting

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. 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 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 10. Go to Step 4.
4 Disconnect the Heated O2 sensor connector and jumper the Heated O2 sensor low circuit, terminal 4 to ground.
Is the HO2 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 8.
5 Check the Heated O2 sensor connector for malfunction terminals or poor connection and repair as necessary.
Is repair necessary?		 - Go to Step 10. Go to Step 6.
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 O2 sensor signal circuit, terminal 3 to ground.

Does the Heated O2 sensor voltage measure above the specified value?		 0.6 V Go to Step 7. Go to Step 11.
7 Does the Heated O2 sensor voltage measure below the specified value? 0.3 V Go to Step 9. Go to Step 11.
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 10. Go to Step 12.
9 Check the Heated O2 sensor signal circuit, terminal 3 for an open or poor connection and repair as necessary.
Is repair necessary?		 - Go to Step 10. Go to Step 12.
10
  1. If disconnected, reconnect Heated O2 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 O2 sensor.
  3. Road tests the vehicle.
  4. Perform the DIAGNOSTIC SYSTEM CHECK .

Is the replacement complete?		 - Go to Step 10. -
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 10. -
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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