DTC Troubleshooting: P0193
DTC P0193: Fuel Rail Pressure Sensor Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0193 Fuel Rail Pressure Sensor Circuit High Voltage
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0193 Fuel Rail Pressure Sensor Circuit High Voltage
    

Is DTC P0193 indicated?

     
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 on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Determine possible failure area (fuel rail pressure sensor, others):

Determine possible failure area (fuel rail pressure sensor, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Fuel rail pressure sensor 5P connector

?3.
Connect terminals A and B with a jumper wire.
Terminal A
Fuel rail pressure sensor 5P connector (female terminals) No. 1:
Terminal B
Fuel rail pressure sensor 5P connector (female terminals) No. 2:


?4.
Turn the vehicle to the ON mode.

?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0193 Fuel Rail Pressure Sensor Circuit High Voltage
    

Is DTC P0193 indicated?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
3.
Determine possible failure area (SG9 line, others):

Determine possible failure area (SG9 line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove the jumper wire from the fuel rail pressure sensor 5P 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 5P connector: disconnected
Test point 1
Fuel rail pressure sensor 5P connector (female terminals) No. 1:
Test point 2
Fuel rail pressure sensor 5P connector (female terminals) No. 3:


Is there about 5.0 V?

     
YES
     
     
     
The SG9 wire is OK. Go to step 4.
     
NO
     
     
     
Go to step 5.
4.
Open wire check (PF line):

Open 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 No. 1 (96P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Fuel rail pressure sensor 5P connector: disconnected
 
PCM connector No. 1 (96P): disconnected
Test point 1
Fuel rail pressure sensor 5P connector (female terminals) No. 2:
Test point 2
PCM connector No. 1 (96P) No. 32


Is there continuity?

     
YES
     
     
     
The PF wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0193 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the PF wire between PCM connector No. 1 terminal No. 32 and the fuel rail pressure sensor.?
5.
Open wire check (SG9 line):

Open wire check (SG9 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 No. 1 (96P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Fuel rail pressure sensor 5P connector: disconnected
 
PCM connector No. 1 (96P): disconnected
Test point 1
Fuel rail pressure sensor 5P connector (female terminals) No. 1:
Test point 2
PCM connector No. 1 (96P) No. 78


Is there continuity?

     
YES
     
     
     
The SG9 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0193 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the SG9 wire between PCM connector No. 1 terminal No. 78 and the fuel rail pressure sensor.?