DTC P1458: FTP Sensor Circuit Range/Performance Problem

Special Tools Required 

Vacuum Pump/Gauge, 0-30 inHg Snap-on YA4000A or equivalent, commercially available

NOTE: 

• Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .
• 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 (PGM-FI)

• 1. Fuel level check:

  - 1. Turn the vehicle to 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

  On-board Snapshot

  Courtesy of HONDA, U.S.A., INC.

  - 3. Check the FUEL LEVEL in the DATA LIST with the HDS.

  Signal	Current conditions
  	Values	Unit
  FUEL LEVEL

  Is the current 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):

  - 1. Select the EVAP TEST in the INSPECTION MENU, then 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)

  Courtesy of HONDA, U.S.A., INC.

  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:

  - 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. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

• 4. FTP sensor performance check 2:

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Remove the FTP sensor .

  - 3. Reconnect the following connector.

  FTP sensor 3P connector

  - 4. Turn the vehicle to 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 

  Replace the FTP sensor .

  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. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

• 5. Determine possible failure area (EVAP canister vent line, others):

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

  - 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:

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Remove the FTP sensor .

  - 3. Reconnect the following connector.

  FTP sensor 3P connector

  - 4. Turn the vehicle to 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.

• 7. FTP sensor port visual check:

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Remove the left middle floor undercover - Refer to: Middle Floor Undercover Removal and InstallationRear Floor Undercover Removal and InstallationFront Floor Undercover Removal and Installation .

  - 3. Disconnect the following connector.

  FTP sensor 3P connector

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

  Courtesy of HONDA, U.S.A., INC.

  Is there any blockage or damage?

  YES 

  Remove the blockage, or replace the FTP sensor if needed.

  NO 

  Replace the FTP sensor .

• 8. EVAP canister vent shut valve check:

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Remove the left middle floor undercover - Refer to: Middle Floor Undercover Removal and InstallationRear Floor Undercover Removal and InstallationFront Floor Undercover Removal and Installation .

  - 3. Disconnect the EVAP canister vent hose (A) from the EVAP canister (B), then connect a vacuum pump/gauge, 0-30 inHg, to the EVAP canister vent shut valve port as shown.

  Courtesy of HONDA, U.S.A., INC.

  - 4. Turn the vehicle to the ON mode.

  - 5. Select the EVAP TEST in the INSPECTION MENU, then select the EVAP CVS OFF in the SINGLE SOLENOID with the HDS.

  - 6. 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 

  Replace the EVAP canister vent shut valve .

  NO 

  The EVAP canister vent shut valve is OK. Remove the blockage in the EVAP canister vent hose. Replace the hose if needed.