DTC Troubleshooting: P1458
DTC P1458: 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.
If any of DTCs listed below are indicated at the same time as DTC P1458, troubleshoot those DTCs first, then recheck for P1458.
?
P0451, P0452, P0453, P1454: FTP sensor
?
P2422: EVAP canister vent shut valve
Do not start the engine during this troubleshooting.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P1458 FTP Sensor Circuit Range/Performance Problem
      

1.
Fuel level check:

Fuel level check
?1.
Press the engine start/stop button to select the ON mode.

?2.
Note these recorded on-board snapshot parameters with the HDS:
MAX Value of FTP SENSOR
MIN Value of FTP SENSOR
FUEL LEVEL

?3.
Check the FUEL LEVEL in the DATA LIST with the HDS.
Signal
Current conditions
Values
Unit
FUEL LEVEL
    

Is the FUEL LEVEL less than it is on the on-board snapshot?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Drain the fuel until the FUEL LEVEL is less than it is on the on-board snapshot, then go to step 2.
2.
Determine possible failure area (FTP sensor, others):

Determine possible failure area (FTP sensor, others)
?1.
Select the EVAP CVS OFF in the SINGLE SOLENOID with the HDS.

  

?2.
Take a snapshot with the HDS for 3 minutes without starting the engine.

?3.
Check the recorded snapshot parameter with the HDS:
MAX Value of FTP SENSOR (FINE)
MIN Value of FTP SENSOR (FINE)


Are the MAX and MIN values of the FTP SENSOR (FINE) within the range of ± 0.67 kPa (0.2 inHg, 5 mmHg)?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 5.
3.
FTP sensor performance check 1:

FTP sensor performance check 1
?1.
Check the FTP SENSOR (FINE) in the recorded snapshot with the HDS.

Does it vary 0.067 kPa (0.02 inHg, 0.5 mmHg) or more within 3 seconds?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM. Also check for a blockage in the EVAP vent hose.?
4.
FTP sensor performance check 2:

FTP sensor performance check 2
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Remove the FTP sensor.

?3.
Reconnect the FTP sensor 3P connecter.

?4.
Press the engine start/stop button to select the ON mode.

?5.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
FTP SENSOR (FINE)
    

Does it vary 0.067 kPa (0.02 inHg, 0.5 mmHg) or more within 3 seconds?

     
YES
     
     
     
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM. Also check for a blockage in the EVAP vent hose.?
5.
Determine possible failure area (EVAP canister vent line, others):

Determine possible failure area (EVAP canister vent line, others)
?1.
Remove the fuel fill cap.

?2.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
FTP SENSOR (FINE)
More than 0.67
kPa
    
Less than -0.67
kPa

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
Reinstall the fuel fill cap, then go to step 8.
6.
FTP sensor vent hose check:

FTP sensor vent hose check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Remove the FTP sensor.

?3.
Reconnect the FTP sensor 3P connecter.

?4.
Press the engine start/stop button to select the ON mode.

?5.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
FTP SENSOR (FINE)
More than 0.67
kPa
    
Less than -0.67
kPa

Do the current condition(s) match the threshold?

     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
Remove the blockage in the FTP sensor vent hose. Replace the hose if needed, then do the repair verification.
7.
FTP sensor port visual check:

FTP sensor port visual check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Check for a blockage or damage at the FTP sensor ports (EVAP canister side and vent side).


Is there any blockage or damage?

     
YES
     
     
     
Remove the blockage, and replace the FTP sensor if needed, then do the repair verification.
     
NO
     
     
     
8.
EVAP canister vent shut valve check:

EVAP canister vent shut valve check
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the fresh air hose (A) from the EVAP canister (B), then connect a vacuum pump/gauge to the EVAP vent shut valve as shown.


?3.
Press the engine start/stop button to select the ON mode.

?4.
Select the EVAP CVS OFF in the SINGLE SOLENOID with the HDS.

  

?5.
Try to apply vacuum to the valve (not more than 5.3 kPa (1.6 inHg, 40 mmHg)) while checking the FTP SENSOR (FINE) in the DATA LIST with the HDS.
NOTE: To avoid damaging the FTP sensor, do not apply more than 5.3 kPa (1.6 inHg, 40 mmHg) of vacuum.

Signal
Current conditions
Values
Unit
FTP SENSOR (FINE)
    

Does the valve hold more than 1.3 kPa (0.4 inHg, 10 mmHg) of vacuum?

     
YES
     
     
     
     
NO
     
     
     
The EVAP canister vent shut valve is OK. Remove the blockage in the fresh air hose. Replace the hose if needed, then do the repair verification.
Repair verification:

?1.
Press the engine start/stop button to select the OFF mode.

?2.
Reconnect all connecters and the fresh air hose.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Reset the PCM with the HDS.


?5.
Do the PCM idle learn procedure.

?6.
Take a snapshot with the HDS for 3 minutes without starting the engine.

?7.
Check the recorded snapshot parameter with the HDS:
MAX Value of FTP SENSOR (FINE)
MIN Value of FTP SENSOR (FINE)

Is the MAX value of the FTP SENSOR (FINE) ± 0.67 kPa (0.2 inHg, 5 mmHg) or less, and is the MIN value of the FTP SENSOR (FINE) ± 0.67 kPa (0.2 inHg, 5 mmHg) or less?

     
YES
     
     
     
Troubleshooting is complete.?
     
NO
     
     
     
Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM, then go to step 1.