DTC P0093:00 [MZ-CD 1.6]


id0102g8146200

DTC P0093:00

Fuel system leak detection

DETECTION CONDITION
•  If the rail pressure governor deviation exceeds the limiting valve 25 kPa {0.25 kgf/cm2, 3.6 psi} and if the high pressure pump delivery quantity reaches the limiting valve 20,620 mm3/s, the PCM determines fuel system leakage.
POSSIBLE CAUSE
•  Fuel pipe improper connection on fuel tank
•  Fuel leakage or clogged fuel line
•  Suction control valve malfunction
•  Supply pump malfunction
•  Fuel pressure sensor malfunction
•  Fuel injector malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA OR SNAPSHOT DATA HAVE BEEN RECORDED
•  Have FREEZE FRAME DATA or snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA and snapshot data on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform the repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the other PENDING CODE/DTC also present?
Yes
Go to the applicable DTC inspection.
No
Go to the next step.
4
INSPECT FUEL PIPE CONNECTION ON FUEL TANK
•  Inspect the fuel pipes for supply and return connection at fuel tank.
•  Are fuel pipes connected properly?
Yes
Go to the next step.
No
Reconnect fuel pipes properly, then go to Step 9.
5
INSPECT FUEL LINE
•  Switch the ignition to off.
•  Inspect for fuel leakage or clogging in the following fuel lines for each cylinder:
―  Supply pump and common rail.
―  Common rail and fuel injector.
•  Is there any malfunction?
Yes
Repair or replace the suspected fuel line, go to Step 9.
No
Go to the next step.
6
INSPECT SUCTION CONTROL VALVE
•  Inspect the suction control valve.
•  Is there any malfunction?
Yes
Repair the supply pump, go to Step 9.
No
Go to the next step.
7
INSPECT FUEL PRESSURE SENSOR
•  Inspect the fuel pressure sensor.
•  Is there any malfunction?
Yes
Replace the common rail, go to Step 9.
No
Go to the next step.
8
INSPECT FUEL INJECTOR
•  Inspect the fuel injector.
•  Is there any malfunction?
Yes
Replace the fuel injector, go to the next step.
No
Go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P0093:00 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform the after repair procedure.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.