| DTC P0139: | Slow Response in Secondary HO2S (Sensor 2) Circuit |
| 1. | Turn the ignition switch ON (ll). |
| 2. | Do the DTC CLEAR in the CLEAR MENU with the Honda PGM Tester or the HDS. |
| 3. | Start the engine. Hold the engine speed at 3,000 rpm (min-1) with no load (in Park or neutral) until the radiator fan comes on, then let it idle. |
| 4. | Test-drive with the throttle fully opened, then slow down with the throttle completely closed for 3 seconds. |
| 5. | Monitor the OBD STATUS for DTC P0139 in the DTCs MENU with the Honda PGM Tester or the HDS. Is it FAILED? YES - Go to 6. NO - If it is PASSED, intermittent failure, system is OK at this time. If it is EXECUTING, keep the driving condition continually until a result comes on. If it is Out of CONDITION, go to 3. and recheck. |
| 6. | Turn the ignition switch OFF. |
| 7. | Replace the secondary HO2S (Sensor 2). |
| 8. | Turn the ignition switch ON (II). |
| 9. | Do the ECM/PCM RESET in the CLEAR MENU with the Honda PGM Tester or the HDS. |
| 10. | Do the ECM/PCM idle learn procedure. |
| 11. | Test-drive with the throttle fully opened, then slow down with the throttle completely closed for 3 seconds. |
| 12. | Check for Temporary DTCs or DTCs in the DTCs MENU with the Honda PGM Tester or the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0139 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC troubleshooting. NO - Go to 13. |
| 13. | Monitor the OBD STATUS for DTC P0139 in the DTCs MENU with the Honda PGM Tester or the HDS. Is it PASSED? YES - Troubleshooting is complete.n NO - If it is FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to 1. If it is EXECUTING, keep the driving condition continually until a result comes on. If it is Out of CONDITION, go to 11 and recheck. |