DTC Troubleshooting: P0777 (77-4)

DTC P0777:  A/T Clutch Pressure Control Solenoid Valve B Stuck ON


NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.

1.Warm up the engine to normal operating temperature (the radiator fan comes on).

2.Check to be sure that the transmission is filled to the proper level, and check for fluid leaks.

3.Check for deterioration in the quality of ATF.

Has the ATF deteriorated?


YES - Replace ATF, and test-drive the vehicle under the same conditions as those indicated by the freeze data, then recheck.


NO - Go to 4.


4.Clear the DTC in CLEAR MENU with the Honda PGM Tester or HDS.

5.Select LINEAR SOL TEST in MISC. TEST MENU, then carry out LINEAR SOL B TEST in LINEAR SOL TEST MENU.

Is the system OK?


YES - Intermittent failure, the system is OK at this time.n


NO - Go to 6.


6.Inspect the A/T clutch pressure control solenoid valve B.

Does the A/T clutch pressure control solenoid valve B work properly?


YES - Shift valve B may be stuck, repair hydraulic system related with shift valve B, or replace the transmission.n


NO - Replace the A/T clutch pressure control solenoid valve B. After replacing the solenoid valve, go to 7, and check that the repair has been completed.


7.Clear the DTC in CLEAR MENU with the Honda PGM Tester or HDS.

8.Test-drive the vehicle for several minutes under the same conditions as those indicated by the freeze data.

9.Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0777.

Did the result pass?


YES - The problem has been corrected.n


NO - Return to step 1 and recheck.n