DTC P0192: Fuel Rail Pressure Sensor Circuit Low Voltage

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) .

DTC (PGM-FI)

• 1. Problem verification:

  - 1. Turn the vehicle to the ON mode and wait 2 seconds.

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

  Signal	Threshold		Current conditions
  	Values	Unit	Values	Unit
  FUEL PRESSURE CONVERTED FROM PF SENSOR	Less than 0.31	V

  Do the current condition(s) match the threshold?

  YES 

  The failure is duplicated. Go to step 2.

  NO 

  Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the fuel rail pressure sensor and the PCM. 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.

• 2. Determine possible failure area (PF line, others):

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

  - 2. Disconnect the following connector.

  Fuel rail pressure 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
  FUEL PRESSURE CONVERTED FROM PF SENSOR	Less than 0.31	V

  Do the current condition(s) match the threshold?

  YES 

  Go to step 3.

  NO 

  Go to step 4.

• 3. Shorted wire check (PF line):

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

  - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

  - 3. Disconnect the following connector.

  PCM connector C (51P)

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

  Test condition	Vehicle OFF (LOCK) mode
  	Fuel rail pressure sensor 3P connector: disconnected
  	PCM connector C (51P): disconnected
  Test point 1	Fuel rail pressure sensor 3P connector No. 1
  Test point 2	Body ground

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

  Is there continuity?

  YES 

  Repair a short in the PF wire between the PCM (C46) and the fuel rail pressure sensor.

  NO 

  The PF wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P0192 goes away and the PCM was updated, troubleshooting is complete. If DTC P0192 goes away and the PCM was substituted, replace the original PCM .

• 4. Determine possible failure area (fuel rail pressure sensor, others):

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

  Test condition	Vehicle ON mode
  	Fuel rail pressure sensor 3P connector: disconnected
  Test point 1	Fuel rail pressure sensor 3P connector No. 2
  Test point 2	Fuel rail pressure sensor 3P connector No. 3

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

  Is there about 5.0 V?

  YES 

  Replace the fuel rail (fuel rail pressure sensor) .

  NO 

  Go to step 5.

• 5. Open wire check (VCC1 line):

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

  - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

  - 3. Disconnect the following connector.

  PCM connector C (51P)

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

  Test condition	Vehicle OFF (LOCK) mode
  	Fuel rail pressure sensor 3P connector: disconnected
  	PCM connector C (51P): disconnected
  Test point 1	Fuel rail pressure sensor 3P connector No. 3
  Test point 2	PCM connector C (51P) No. 41

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

  Is there continuity?

  YES 

  The VCC1 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P0192 goes away and the PCM was updated, troubleshooting is complete. If DTC P0192 goes away and the PCM was substituted, replace the original PCM .

  NO 

  Repair an open in the VCC1 wire between the PCM (C41) and the fuel rail pressure sensor.