What does code P1478 mean on Audi vehicles?
A blocked or clamped hose has been detected in the EVAP system.
OBD-II Code Audi
P1478 — Audi — EVAP Emission Control Leak Detection Pump Circuit Clamped Tube Detected
A blocked or clamped hose has been detected in the EVAP system.
Common symptoms
- Check engine light.
Possible causes
- Pinched hose.
Initial recommendation
Inspect EVAP lines.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
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