Honda Accord 2008 Manual page 721

07/11/02 09:19:56 61TA0000_110_0402
EVAP System
DTC Troubleshooting (cont'd)
DTC P0451: FTP Sensor Circuit Range/
Performance Problem
NOTE:
• Before you troubleshoot, record all freeze data and
any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
• If DTC P2422 is stored at the same time as DTC P0451,
troubleshoot DTC P2422 first, then recheck for DTC
P0451.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 1 minute.
4. Monitor the OBD STATUS for DTC P0451 in the
DTCs MENU with the HDS.
Does the screen indicate F AILED?
YES − Go to step 5.
NO − If the screen indicates PASSED, intermittent
failure, the system is OK at this time. Check for
poor connections or loose terminals at the FTP
sensor and the ECM/PCM. If the screen indicates
NOT COMPLETED, keep idling until a result comes
on.
5. Turn the ignition switch to LOCK (0).
6. Replace the FTP sensor (see page 11-430).
7. Turn the ignition switch to ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see page
11-343).
10. Start the engine, and let it idle for 1 minute.
11-402
11. Check for Temporary DTCs or DTCs with the HDS.
Is DT C P0451 indicated?
YES − Check for poor connections or loose
terminals at the FTP sensor and the ECM/PCM, then
go to step 1.
−
NO Go to step 12.
12. Monitor the OBD STATUS for DTC P0451 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 11,
go to the indicated DTC's troubleshooting.
NO − If the screen indicates FAILED, check for poor
connections or loose terminals at the FTP sensor
and the ECM/PCM, then go to step 1. If the screen
indicates NOT COMPLETED, keep idling until a
result comes on.
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