DTC P0193 [MZR-CD (RF Turbo)]

BME010200100W37

DTC P0193

Fuel pressure sensor circuit high input

DETECTION CONDITION

• PCM monitors input voltage from fuel pressure sensor while engine is running. If input voltage from fuel pressure sensor is above 4.8 V, PCM determines fuel pressure sensor circuit high input.

POSSIBLE CAUSE

• Fuel pressure sensor malfunction
• Connector or terminal malfunction
• Fuel pressure sensor power and signal circuits short each other
• Open circuit in wiring between fuel pressure sensor terminal B and PCM terminal 61
• Open circuit in wiring between fuel pressure sensor terminal A and PCM terminal 91
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
2
INSPECT POOR CONNECTION OF FUEL PRESSURE SENSOR CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace suspected terminal, go to Step 7.
No
Go to next step.
3
INSPECT FUEL PRESSURE SENSOR CIRCUIT FOR SHORT WITH EACH OTHER
• Turn engine switch to OFF.
• Inspect continuity between fuel pressure sensor terminals C and B
• Is there continuity?
Yes
Repair or replace harness for short with each other, go to Step 7.
No
Go to next step.
4
INSPECT FUEL TEMPERATURE SENSOR
• Inspect fuel temperature sensor.
• Is there any malfunction?
Yes
Repair supply pump, go to Step 7.
No
Go to next step.
5
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace suspected terminal, go to Step 7.
No
Go to next step.
6
INSPECT FUEL PRESSURE SENSOR CIRCUIT FOR OPEN
• Turn engine switch to OFF.
• Inspect continuity between following harnesses:
- Fuel pressure sensor terminal B and PCM terminal 61.
- Fuel pressure sensor terminal A and PCM terminal 91.
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open, go to next step.
7
VERIFY TROUBLESHOOTING OF DTC P0193 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Start engine.
• Is same DTC present?
Yes
Replace PCM, go to next step.
No
Go to next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.