What does code P1520 mean on Hyundai vehicles?
The ECU detects a malfunction in the alternator FR (Field Return) terminal circuit, affecting charging control.
OBD-II Code Hyundai
P1520 — Hyundai — Alternator FR Terminal Malfunction
The ECU detects a malfunction in the alternator FR (Field Return) terminal circuit, affecting charging control.
Common symptoms
- Incorrect battery charging
- voltage regulation issues
Possible causes
- Faulty alternator
- damaged wiring
- poor FR terminal connection
Initial recommendation
Inspect charging system, test alternator FR signal and wiring integrity.
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 Hyundai code P1520 with your vehicle's actual symptoms for more complete diagnostic guidance.
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