DTC P0135: HO2S Heater Performance Sensor 1: Troubleshooting
TROUBLESHOOTING CHART
| Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
| 1 | Perform an On-Board Diagnostic (OBD II) System Check. Is the check complete? |
- | Go to Step 2 | Go to On-Board Diagnostic (OBD II) System Check |
| 2 |
NOTE:
If the engine has just been operating, allow the engine to cool for about one-half hour before proceeding.
|
0 V or 1 V | Go to Step 13 | Go to Step 3 |
| 3 |
Does the test light illuminate? |
- | Go to Step 4 | Go to Step 5 |
| 4 | Connect a test light between the ignition feed and ground circuits, terminals 2 and 4 of the connector. Does the test light illuminate? |
- | Go to Step 6 | Go to Step 7 |
| 5 | Inspect the fuse in the engine fuse block. Is the fuse open? |
- | Go to Step 8 | Go to Step 9 |
| 6 | Check the connections terminal 2 and 3 at the HO2S1 connector and repair as necessary. Is a repair necessary? |
- | Go to Step 13 | Go to Step 10 |
| 7 | Check the connections terminal 4 at the HO2S1 connector and repair as necessary. Is a repair necessary? |
- | Go to Step 13 | Go to Step 11 |
| 8 |
Is the action complete? |
- | Go to Step 13 | - |
| 9 | Check the connections terminal 2 at the HO2S1 connector and repair as necessary. Is the repair complete? |
- | Go to Step 13 | Go to Step 12 |
| 10 | Replace the HO2S1 sensor. Is the action complete? |
- | Go to Step 13 | - |
| 11 | Repair the open in the ground circuit. Is the action complete? |
- | Go to Step 13 | - |
| 12 | Repair the open in the ignition feed circuit. Is the action complete? |
- | Go to Step 13 | - |
| 13 |
Does the scan tool indicate that this diagnostic has run and passed? |
- | Go to Step 14 | Go to Step 2 |
| 14 | Check if any additional DTCs are set. Are any DTCs displayed that have not been diagnosed? |
- | Go to applicable DTC table | System OK |