DTC Troubleshooting

Control System DTCs

DTC Troubleshooting: P1454

DTC P1454 : 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 How to Troubleshoot the Fuel And Emissions Systems.

1. EVAP system check:

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

-2. Clear the DTC with the HDS. How to Troubleshoot the Fuel And Emissions Systems

-3. Turn the ignition switch to LOCK (0).

-4. Remove the fuel fill cap, and wait 1 minute.

-5. Turn the ignition switch to ON (II).

-6. Check the parameter(s) below with the HDS.






Do the current condition(s) match the threshold?
-YES- Go to step 2.
-NO- Go to step 4.

2. Problem verification:

-1. Install the fuel fill cap.

-2. Clear the DTC with the HDS. How to Troubleshoot the Fuel And Emissions Systems

-3. Start the engine, and let it idle without load (in P or N) until the radiator fan comes on.

-4. Monitor the EVAP PC DUTY (purge control duty) in the DATA LIST with the HDS, while holding the engine speed at 3,000 rpm with the EVAP PC DUTY at 20 % or more for at least 4 minutes, then let the engine idle.






-5. Monitor the OBD STATUS for DTC P1454 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, there might be an intermittent failure, and the system is OK at this time. Check the on-board snapshot, and repeat the driving conditions when the DTC set (fuel level, engine speed, vehicle speed, and outside temperature). If no problem is found, check for poor connections or loose terminals between the FTP sensor and the PCM. Also check for a blockage in the FTP sensor vent port and vent hose, and the EVAP canister vent hose and drain joint. If the HDS indicates NOT COMPLETED, let the engine idle until a result comes on.

3. EVAP canister vent shut valve operation check:

-1. Turn the ignition switch to LOCK (0).

-2. Remove the EVAP canister vent shut valve from the EVAP canister Service and Repair.

-3. Connect the 2P connector to the EVAP canister vent shut valve.

-4. Turn the ignition switch to ON (II).

-5. Select EVAP TEST in the INSPECTION MENU, and do the EVAP CVS ON in the SINGLE SOLENOID with the HDS.

-6. Check the EVAP canister vent shut valve (A) operation.





Is the valve free of corrosion, and does it operate properly?
-YES- Check for a blockage in the EVAP canister, the vent hoses, and the drain joint, and repair it if needed. Install the EVAP canister vent shut valve, then do the repair verification.
-NO- Replace the EVAP canister vent shut valve Service and Repair, then do the repair verification.

4. FTP sensor vent hose restriction check:

-1. Disconnect the vent hose (A) from the FTP sensor (B).






-2. Check the parameter(s) below with the HDS.






Do the current condition(s) match the threshold?
-YES- Check for a blockage in the FTP sensor vent hose, then do the repair verification.
-NO- The FTP sensor vent hose is OK. Go to step 5.

5. FTP sensor port restriction check:

-1. Turn the ignition switch to LOCK (0).

-2. Remove the FTP sensor (A) from the EVAP canister with its connector connected.






-3. Turn the ignition switch to ON (II).

-4. Check the parameter(s) below with the HDS.






Do the current condition(s) match the threshold?
-YES- The FTP sensor port is OK. The EVAP canister has an internal blockage; replace the EVAP canister Service and Repair, then do the repair verification.
-NO- Replace the FTP sensor Service and Repair, then do the repair verification.

Repair verification (OBD STATUS check):

-1. Turn the ignition switch to LOCK (0).

-2. Install the parts in the reverse order of removal.

-3. Turn the ignition switch to ON (II).

-4. Reset the PCM with the HDS How to Troubleshoot the Fuel And Emissions Systems.

-5. Do the PCM idle learn procedure PCM Idle Learn Procedure.

-6. Monitor the EVAP PC DUTY (purge control duty) in the DATA LIST with the HDS, while holding the engine speed at 3,000 rpm with the EVAP PC DUTY at 20 % or more for at least 4 minutes, then let the engine idle.






-7. Monitor the OBD STATUS for DTC P1454 in the DTCs MENU with the HDS.






Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?
-PASSED- Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.
-FAILED- Go to step 1 and recheck.
-NOT COMPLETED- Hold the engine speed at 3,000 rpm with the EVAP PC DUTY at 20% or more until a result comes on.