DTC code
P0093
Fuel System Leak Detected Large Leak
Technical guide
Symptoms
- Hard start
- loss of power
- rough running
- smoke (diesel)
Probable causes
- Fuel system large leak detected
- injector return flow too high
- HPFP internal leak
- fuel line leak
- return flow regulator fault
Diagnostic steps
- Check for visible fuel leaks.
- Perform injector return flow test — high return = leaking injector.
- Check HPFP internal seals.
- Replace leaking injector(s).
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0093
Nothing confirmed yet for this code. No guess is offered on purpose.
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