P0500: Vehicle Speed Sensor "A" Malfunction

P0500 means the engine control unit is not receiving a valid signal from the vehicle speed sensor. This sensor, typically mounted on the transmission or wheel hub, tells the ECU how fast the vehicle is moving. Without it, the speedometer, cruise control, ABS, and transmission shift logic are affected.

P0500 è un codice diagnostico di guasto relativo a impianto elettrico, classificato con gravità moderate. Quando la centralina (ECU) del tuo veicolo rileva questa condizione, memorizza P0500 e accende la spia motore.

Se il tuo veicolo ha attivato P0500, potresti notare uno o più di questi sintomi:

• Speedometer reads zero or behaves erratically
• ABS and traction control warning lights on
• Cruise control does not engage
• Automatic transmission shifts harshly or at wrong RPM
• Check engine light on
• Odometer stops recording distance

Ecco le cause più comuni di P0500, ordinate in base alla probabilità che siano la causa del problema:

No, risolvi subito il problema. Without a valid speed signal, the speedometer will not work, ABS and traction control may be disabled, and automatic transmission shift points will be incorrect. Drive cautiously to a repair facility.

Segui questi passaggi per individuare la causa principale di P0500:

1. Connect a scan tool and check live data for vehicle speed sensor reading. Drive the vehicle slowly in a safe area and verify whether the scan tool shows any speed. If it reads zero, the signal is not reaching the ECU
2. Locate the vehicle speed sensor on the transmission (usually on the output shaft housing or tailshaft). Inspect the connector for corrosion, oil contamination, or loose pins
3. Test the sensor with a multimeter. For a magnetic pickup sensor, measure resistance (typically 200-1500 ohms). For a Hall-effect sensor, check for 5V reference and ground
4. Inspect the wiring from the sensor to the ECU for damage, especially in areas that cross the exhaust or are exposed to road debris. Check for continuity end to end
5. If the sensor and wiring test good, inspect the reluctor ring or tone ring for missing teeth or damage. This requires removing the sensor and visually inspecting the ring through the sensor bore

I costi di riparazione di P0500 variano a seconda della causa principale e del tuo veicolo. Ecco le stime tipiche:

P0500 si comporta in modo diverso a seconda del tuo veicolo. Seleziona la tua auto qui sotto per cause specifiche del modello, problemi noti e stime dei costi adeguate:

Questi codici compaiono spesso insieme a P0500 o indicano problemi correlati: