DTC P0193
DTC P0193 : Fuel Rail Pressure Sensor Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to: 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), or How to Troubleshoot the A/T System (2014 2015) .
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0193 Fuel Rail Pressure Sensor Circuit High Voltage |
DTC (PGM-FI)
- Problem verification
-1. Turn the vehicle to the ON mode, and wait for 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 More than 4.89 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.
- Determine possible failure area (PF sensor, others)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
Fuel rail pressure sensor 3P connector - 3. Connect terminals A and B with a jumper wire.
Terminal A fuel rail pressure sensor 3P connector No. 1 (WHT) Terminal B fuel rail pressure sensor 3P connector No. 2 (BLU) - 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 FUEL PRESSURE CONVERTED FROM PF SENSOR More than 4.89 V Do the current condition(s) match the threshold?
YES
Go to step 3.
NO
- Determine possible failure area (PF line, SG1 line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Remove the jumper wire from the fuel rail pressure sensor 3P connector.
- 3. Turn the vehicle to the ON mode.
- 4. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Fuel rail pressure sensor 3P connector: disconnected Test circuit PF, SG1 Test point 1 Fuel rail pressure sensor 3P connector No. 2 (BLU) Test point 2 Fuel rail pressure sensor 3P connector No. 3 (PNK) Is there about 5.0 V?
YES
SG1 wire is OK. Go to step 4.
NO
Go to step 5.
- Open wire check (PF line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS
- 3. Disconnect the following connector.
- 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 B (51P): disconnected Test circuit PF Test point 1 Fuel rail pressure sensor 3P connector No. 1 (WHT) Test point 2 PCM connector B (51P) No. 35 (WHT) Is there continuity?
YES
The PF 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 PF wire between the PCM (B35) and the fuel rail pressure sensor.
- Open wire check (SG1 line)
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Jump the SCS line with the HDS.
- 3. Disconnect the following connector.
- 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 circuit SG1 Test point 1 Fuel rail pressure sensor 3P connector No. 2 (BLU) Test point 2 PCM connector C (51P) No. 33 (BLU) Is there continuity?
YES
The SG1 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 SG1 wire between the PCM (C33) and the fuel rail pressure sensor.