Vehicle Speed Sensor "A" Malfunction
The P0500 code means the vehicle's onboard diagnostic system has detected: Vehicle Speed Sensor "A" Malfunction. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- medium
- Estimated cost
- $30-$100 for VSS sensor; $80-$200 labor
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Common Symptoms
- Speedometer not working or erratic
- ABS and traction control warning lights may come on
- Transmission shift problems
- Check Engine Light on
Probable Causes (Ranked by Likelihood)
- Failed vehicle speed sensor (VSS) Very High
- Damaged tone ring or reluctor wheel Moderate
- Wiring fault to VSS Moderate
- Faulty instrument cluster (speedometer head) Low
Step-by-Step Diagnostic Procedure
-
Monitor vehicle speed on a live data scan while driving. If it reads zero or erratically, the sensor or its circuit is faulty.
-
Locate the VSS (on the transmission or at the wheel). On magnetic (variable-reluctance) sensors, measure coil resistance and compare to the factory service-manual spec -- typical values run roughly 200-2,400 ohms depending on the application, so a reading judged against a generic number is meaningless; an open or shorted reading means a failed sensor.
-
Inspect wiring for damage, especially near the transmission where heat and vibration cause insulation breakdown.
-
Check the tone ring for bent or missing teeth.
Common Fixes by Vehicle
What techs usually find when diagnosing P0500 on specific vehicles — tap your vehicle for the fix and the exact part:
2007-2017 Toyota Camry/Corolla 2.5L easy DIY
The vehicle speed sensor is located on the transmission output shaft. Replace with Denso 196-1103. Before replacing, check the wiring connector for corrosion and verify the speedometer is also erratic. If the speedometer works fine, the issue may be in the ECU circuit rather than the sensor. Check for rodent damage to the wiring harness near the transmission.
Labor: 30 min2008-2019 Honda Accord/Civic 2.4L easy DIY
Honda uses a transmission-mounted VSS. If the speedometer, cruise control, and ABS are all affected, the speed sensor is the likely cause. Replace with Dorman 917-658. If only the check engine light is on with no drivability issues, check the wiring between the sensor and the ECU. Honda TSB 07-008 covers speed sensor circuit diagnostics.
Labor: 30-45 min2002-2015 Nissan Altima/Sentra 2.5L QR25DE easy DIY
The output shaft speed sensor on Nissan CVT and automatic transmissions fails around 100-120K miles. Symptoms include erratic speedometer and transmission shifting issues. Replace with Hitachi VSS0029. On CVT-equipped models, also check the CVT fluid level and condition -- low fluid causes erratic speed sensor readings. Use only Nissan NS-3 CVT fluid.
Labor: 30 minFrequently Asked Questions
Can I drive with a bad vehicle speed sensor?
Yes, carefully. The engine will still run, but the transmission may not shift correctly (may stay in a fixed gear or shift erratically), ABS may be disabled, and cruise control will not work. Avoid highway driving until repaired.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0500 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
See All Codes & Fixes for Your Vehicle
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