Kod błędu P0620 oznacza nieprawidłowe działanie obwodu sterowania generatora (alternatora) – układ sterujący ładowaniem akumulatora wykrył nieprawidłowość w komunikacji lub działaniu alternatora.
P1500
WysokiFault code P1500 is a manufacturer-specific code. It most often indicates a fault in the vehicle speed sensor (VSS) circuit – the signal is intermittent or incorrect. For some manufacturers (GM, Mitsubishi), it indicates a problem with the alternator (generator) circuit.
Code P1500 is a difficult-to-diagnose manufacturer-specific fault – it can indicate either a vehicle speed sensor fault or an alternator problem. Symptoms often involve incorrect speedometer readings or transmission limp mode. For an accurate diagnosis, using a professional OBD-II scanner and vehicle service documentation is recommended.
Symptoms
Check Engine light; speedometer operates incorrectly (jumps, shows zero); jerking or incorrect gear shifts in automatic transmissions; reduced engine power; transmission limp mode; battery charging problems (with alternator fault).
Possible causes
Faulty vehicle speed sensor (VSS) Broken or damaged VSS signal wires Corrosion or loose connections at the sensor connector Sensor contamination (magnetic filings, dirt) Faulty alternator or voltage regulator (GM, Mitsubishi models) Open alternator FR (Field Regulator) circuit Faulty controller (ECM/PCM) – rarely
Affected systems
Related codes
Czujnik prędkości pojazdu (VSS) — usterka
Does code P1500 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.
