What does code P1556 mean on Volkswagen vehicles?
The actual turbocharger charge pressure is lower than requested.
OBD-II Code Volkswagen
P1556 — Volkswagen — Charge Pressure Negative Deviation
The actual turbocharger charge pressure is lower than requested.
Common symptoms
- Low engine power
Possible causes
- Boost leaks
- faulty control valve
- turbocharger wear
Initial recommendation
Inspect turbocharger system for leaks and verify boost control operation.
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 P1556 with your vehicle's actual symptoms for more complete diagnostic guidance.
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