Honda Accord 2008 Manual page 425

07/11/02 09:04:05 61TA0000_110_0106
PGM-FI System
DTC Troubleshooting (cont'd)
DTC P0139: Secondary HO2S (Sensor 2) Slow
Response
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle without load (A/T in
P or N, M/T in neutral) until the radiator fan comes
on.
4. Test-drive under these conditions:
• Engine coolant temperature (ECT SENSOR 1)
above 158 °F (70 °C)
• A/T in D, M/T in 4th
• Drive at a steady speed between 55 75 mph
−
(88 120 km/h) for 1 minute, then decelerate
(with throttle fully closed) for 10 seconds
5. Monitor the OBD STATUS for DTC P0139 in the
DTCs MENU with the HDS.
Does the screen indicate F AILED?
YES − Go to step 6.
NO − If the screen indicates PASSED, intermittent
failure, the system is OK at this time. Check for
poor connections or loose terminals at the
secondary HO2S (Sensor 2) and the ECM/PCM. If
the screen indicates EXECUTING, keep driving until
a result comes on. If the screen indicates OUT OF
CONDITION or NOT COMPLETED, go to step 3 and
recheck.
6. Turn the ignition switch to LOCK (0).
7. Replace the secondary HO2S (Sensor 2) (see page
11-225).
8. Turn the ignition switch to ON (II).
9. Reset the ECM/PCM with the HDS.
11-106
10. Do the ECM/PCM idle learn procedure (see page
11-343).
11. Start the engine, and let it idle without load (A/T in
P or N, M/T in neutral) until the radiator fan comes
on.
12. Test-drive under these conditions:
• Engine coolant temperature (ECT SENSOR 1)
above 158 °F (70 °C)
• A/T in D, M/T in 4th
• Drive at a steady speed between 55 75 mph
(88 120 km/h) for 1 minute, then decelerate −
(with throttle fully closed) for 10 seconds
13. Check for Temporary DTCs or DTCs with the HDS.
Is DT C P0139 indicated?
− −
YES
terminals at the secondary HO2S (Sensor 2) and
the ECM/PCM, then go to step 1.
NO − Go to step 14.
14. Monitor the OBD STATUS for DTC P0139 in the
DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES −
Temporary DTCs or DTCs were indicated in step 13,
go to the indicated DTC's troubleshooting.
NO − If the screen indicates FAILED, check for poor
connections or loose terminals at the secondary
HO2S (Sensor 2) and the ECM/PCM, then go to step
1. If the screen indicates EXECUTING, keep driving
until a result comes on. If the screen indicates OUT
OF CONDITION or NOT COMPLETED, go to step 11.
ＴＡ０８ＡＥＡＫ７２１０００９０１３９ＦＡＡＴ３０
Check for poor connections or loose
Troubleshooting is complete. If any other
−