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DTC P0093 [MZR-CD (RF Turbo)]

BME010200001W09

DTC P0093 | Fuel system leak detection
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DETECTION CONDITION | • PCM monitors fuel pressure in common rail from fuel pressure sensor while engine running. If fuel pressure is lower after fuel injection than preprogrammed criteria, PCM determines fuel system leak detection.
POSSIBLE CAUSE | • Fuel leakage or clogged fuel line • Suction control valve malfunction • Fuel pressure sensor malfunction • Fuel injector malfunction • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 | FOLLOW OTHER DETECTED DTC FIRST • Turn engine switch to OFF. • Start engine. • Have P0192, P0193, P1190 been detected? | Yes | Go to applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Go to next step.
3 | INSPECT FUEL LINE • Turn engine switch to OFF. • Inspect for fuel leakage or clogs in following fuel lines for each cylinder:

  - Supply pump and Common rail.
  - Common rail and fuel injector.

• Is there any malfunction?
Yes
Repair or replace suspected fuel line, go to Step 7.
No | Go to next step.
4 | INSPECT SUCTION CONTROL VALVE • Inspect suction control valve. (See SUCTION CONTROL VALVE INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Repair supply pump, go to Step 7. (See SUPPLY PUMP INSPECTION [MZR-CD (RF Turbo)].)
No | Go to next step.
5 | INSPECT FUEL PRESSURE SENSOR • Inspect fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace common rail, go to Step 7. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
6 | INSPECT FUEL INJECTOR • Inspect fuel injector. (See FUEL INJECTOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace fuel injector, go to next step. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
7 | VERIFY TROUBLESHOOTING OF DTC P0093 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. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is there any DTC present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.