DTC Troubleshooting

Control System DTCs

DTC Troubleshooting: P1734

DTC P1734 : Shift Error F

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information How to Troubleshoot the A/T System.


1. ATF check:

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

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

-3. Drain the ATF ATF Replacement through a strainer. Inspect the strainer for metal debris or excessive clutch material.

Does the strainer have metal debris or excessive clutch material?
-YES- Replace the transmission Automatic Transmission Removal And Installation, then do the repair verification.
-NO- Replace the ATF ATF Replacement, then go to step 2.

2. Problem verification (test-drive):

-1. Turn the ignition switch to ON (II).

-2. Clear the DTC with the HDS.

-3. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears.

-4. Monitor the OBD STATUS for P1734 in the DTCs MENU with the HDS.






Does the HDS indicate FAILED?
-YES- The failure is duplicated. Go to step 3.
-NO- If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, test-drive again.

3. Shift solenoid valve B operation check:

-1. Clear the DTC with the HDS.

-2. Select Shift Solenoid Valve B in the Miscellaneous Test Menu, and check that shift solenoid valve B operates with the HDS.

Is a clicking sound heard?
-YES- Shift solenoid valve B is OK. Go to step 4.
-NO- Replace shift solenoid valve B Shift Solenoid Valve Removal/Installation, then do the repair verification.

4. Shift solenoid valve C operation check:

-1. Select Shift Solenoid Valve C in the Miscellaneous Test Menu, and check that shift solenoid valve C operates with the HDS.

Is a clicking sound heard?
-YES- Shift solenoid valve C is OK. Go to step 5.
-NO- Replace shift solenoid valve C Shift Solenoid Valve Removal/Installation, then do the repair verification.

5. Problem verification (OBD STATUS check):

-1. Turn the ignition switch to ON (II).

-2. Clear the DTC with the HDS.

-3. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears.

-4. Monitor the OBD STATUS for P1734 in the DTCs MENU with the HDS.






Does the HDS indicate FAILED?
-YES- The failure is duplicated. Repair the hydraulic system related with shift valves B and C, or replace the transmission Automatic Transmission Removal And Installation, then do the repair verification.
-NO- If the HDS indicates PASSED, intermittent failure, the system is OK at this time. If the HDS indicates NOT COMPLETED, test-drive again.

Repair verification (OBD STATUS check):

-1. Turn the ignition switch to ON (II).

-2. Clear the DTC with the HDS.

-3. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears.

-4. Monitor the OBD STATUS for P1734 in the DTCs MENU with the HDS.






Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?
-PASSED- Troubleshooting is complete. Check for other DTC after this troubleshooting. If any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.
-FAILED- Troubleshooting is incomplete. Go to step 3 and recheck.
-NOT COMPLETED- Repair verification is incomplete. Meet the test condition, and check the OBD STATUS again.