What does code P1478 mean on Volkswagen vehicles?
The ECU detects a restricted or clamped EVAP hose during leak detection.
OBD-II Code Volkswagen
P1478 — Volkswagen — EVAP Control System LDP Clamped Tube Detected
The ECU detects a restricted or clamped EVAP hose during leak detection.
Common symptoms
- Check engine light
Possible causes
- Kinked or blocked EVAP hose
Initial recommendation
Inspect EVAP hoses and correct any restrictions.
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
Use the app to combine Volkswagen code P1478 with your vehicle's actual symptoms for more complete diagnostic guidance.
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