What does code P1602 mean on Volkswagen vehicles?
The ECU detects low voltage at terminal 30 (constant battery power supply).
OBD-II Code Volkswagen
P1602 — Volkswagen — Power Supply Terminal 30 Low Voltage
The ECU detects low voltage at terminal 30 (constant battery power supply).
Common symptoms
- Check engine light
- electrical faults
Possible causes
- Weak battery
- alternator malfunction
- poor connections
Initial recommendation
Check charging system, battery, and terminal connections.
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 P1602 with your vehicle's actual symptoms for more complete diagnostic guidance.
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