What does P0500 mean?
Vehicle Speed Sensor Malfunction
Direct Answer
P0500 means the ECM is not receiving a valid signal from the vehicle speed sensor (VSS). The VSS tells the ECM how fast the car is moving — this signal is used for shift points (automatic transmission), ABS operation, speedometer function, idle air control, and torque converter lockup.
Common Symptoms
- ✓Check engine light on
- ✓Speedometer reads zero or erratically
- ✓ABS and traction control warning lights on
- ✓Harsh or erratic automatic transmission shifts
- ✓Stalling when coming to a stop (IAC cannot respond correctly)
Common Causes
- 01Failed vehicle speed sensor
- 02Damaged VSS wiring or connector
- 03Damaged reluctor ring on the transmission or differential
- 04Faulty ABS wheel speed sensor (on vehicles that use ABS sensors for VSS signal)
How to Fix P0500
Scan for ABS codes as well
On modern vehicles, the ABS wheel speed sensors provide the vehicle speed signal. Check for ABS fault codes — a bad wheel speed sensor often causes P0500.
Inspect VSS wiring
The VSS is usually mounted on the transmission or transfer case. Check for physical damage to the connector and wiring near the hot exhaust and moving driveshaft.
Replace the vehicle speed sensor
Most VSS units are easily accessible on the transmission housing. Replacement is straightforward on most vehicles.
Frequently Asked Questions
Can P0500 cause my cruise control to stop working?
Yes. Cruise control systems rely on vehicle speed data. A failed VSS signal will disable cruise control as a safety measure.
Estimated Repair Cost
$50–$400
VSS sensor: $20–$80. Labor: $50–$200. ABS wheel speed sensor: $50–$200.
Safe to Drive?
No — avoid driving
Limit driving. ABS and stability control may be disabled, which is a safety concern. Speedometer inaccuracy means you may unknowingly speed.
Related Codes
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