DTC P0452 (2014 2015 2016)

DTC P0452  : FTP Sensor Circuit Low Voltage

DTC (PGM-FI)

1. EVAP system check

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

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

   - 4. Remove the fuel fill cap.

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

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   FTP SENSOR	Less than 0.3	V

   Do the current condition(s) match the malfunction threshold?

   YES 

   Go to step 3.

   NO 

   Go to step 2.

2. Problem verification

   -1. Install the fuel fill cap.

   - 2. Start the engine, and let it idle.

   - 3. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS.

   DTC Description	OBD STATUS
   P0452 FTP Sensor Circuit Low Voltage

   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. Check for poor connections or loose terminals at the FTP sensor and the PCM.

3. Determine possible failure area (PTANK line, others)

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

   - 2. Disconnect the following connector.

   FTP sensor 3P connector

   - 3. Turn the vehicle to the ON mode.

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

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   FTP SENSOR	Less than 0.3	V

   Do the current condition(s) match the malfunction threshold?

   YES 

   Go to step 4.

   NO 

   Go to step 5.

4. Shorted wire check (PTANK line)

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

   - 2. Jump the SCS line with the HDS.

   - 3. Disconnect the following connector.

   PCM connector A (51P) - Refer to: How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016), or How to Troubleshoot the A/T System (2014 2015), or How to Troubleshoot the Fuel and Emissions Systems

   - 4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	FTP sensor 3P connector: disconnected
   	PCM connector A (51P): disconnected
   Test circuit	PTANK
   Test point 1	FTP sensor 3P connector No. 2 (PUR)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short in the PTANK wire between the PCM (A30) and the FTP sensor.

   NO 

   The PTANK wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016) .

5. Determine possible failure area (FTP sensor, others)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	FTP sensor 3P connector: disconnected
   Test circuit	VCC7
   Test point 1	FTP sensor 3P connector No. 3 (ORN)
   Test point 2	Body ground

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

   Is there about 5.0 V?

   YES 

   Replace the FTP sensor .

   NO 

   Go to step 6.

6. Open wire check (VCC7 line)

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

   - 2. Jump the SCS line with the HDS.

   - 3. Disconnect the following connector.

   PCM connector A (51P) - Refer to: How to Troubleshoot the A/T System (2014 2015), or How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016)

   - 4. Connect terminals A and B with a jumper wire.

   Terminal A	FTP sensor 3P connector No. 3 (ORN)
   Terminal B	Body ground

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

   - 5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	FTP sensor 3P connector: disconnected
   	FTP sensor 3P connector No. 3: jumped to body ground
   	PCM connector A (51P): disconnected
   Test circuit	VCC7
   Test point 1	PCM connector A (51P) No. 19 (ORN)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   The VCC7 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016) .

   NO 

   Repair an open in the VCC7 wire between the PCM (A19) and the FTP sensor.