DTC code
C004D
Brake System Pressure Slow Response
Technical guide
reference — not individually verifiedSymptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Probable causes
high: Pump weak or hydraulic restriction
Diagnostic steps
Check the components involved: hcu, brake pump. Verify wiring and connectors before replacing any part. Job difficulty: hard (workshop equipment required). Typical European range — 400-2500 EUR, 2-6 h. Reference values only.
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 C004D
Nothing confirmed yet for this code. No guess is offered on purpose.
Open a case