Honda Accord 2008 Manual page 410

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07/11/02 09:03:21 61TA0000_110_0091
DTC P0125:
ECT Sensor 1 Malfunction/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. Start the engine, and let it idle for 5 minutes or
more.
2. Check ECT SENSOR 1 in the DATA LIST with the
HDS.
Is about 0 °F (
YES
Go to step 9.
NO
Go to step 3.
3. Allow the engine to cool to 104 °F (40 °C) or less.
4. Note the value of ECT SENSOR 1 and ECT SENSOR
2 in the DATA LIST with the HDS.
5. Start the engine, and let it idle.
6. Let the engine idle until ECT SENSOR 1 goes up
41 °F (23 °C) or more from the recorded
temperature.
7. Note the value of ECT SENSOR 2 in the DATA LIST
with the HDS.
8. Compare ECT SENSOR 2 and the recorded
temperature.
Did ECT SENSOR 2 change 14 °F ( 8 °C) or more?
YES
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
NO
Check the thermostat (see page 10-4). If the
thermostat is OK, go to step 9. If the thermostat is
faulty, replace it (see page 10-9), then go to step 11.
18 °C) or less indicated?
9. Turn the ignition switch to LOCK (0).
10. Replace ECT sensor 1 (see page 11-228).
11. Turn the ignition switch to ON (II).
12. Reset the ECM/PCM with the HDS.
13. Do the ECM/PCM idle learn procedure (see page
11-343).
14. Allow the engine to cool to ambient temperature.
15. Start the engine, and let it idle for 20 minutes.
16. Check for Temporary DTCs or DTCs with the HDS.
Is DT C P0125 indicated?
YES
Check for poor connections or loose
terminals at ECT sensor 1, ECT sensor 2, and the
ECM/PCM, then go to step 1.
NO
Go to step 17.
17. Monitor the OBD STATUS for DTC P0125 in the
DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 16,
go to the indicated DTC's troubleshooting.
NO
If the screen indicates FAILED, check for poor
connections or loose terminals at ECT sensor 1,
ECT sensor 2, and the ECM/PCM, then go to step 1.
If the screen indicates NOT COMPLETED, go to step
14.
TA08AEAK72100090125FAAT30
11-91

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