Vehicle Speed Sensor A Range/Performance
The P0501 code means the vehicle's onboard diagnostic system has detected: Vehicle Speed Sensor A Range/Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $350 (parts and labor)
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Common Symptoms
- Speedometer reading incorrectly or erratically
- Transmission shifting abnormally
- Cruise control not working
- ABS or traction control light on
- Check engine light illuminated
Probable Causes (Ranked by Likelihood)
- Faulty vehicle speed sensor (VSS) Very High
- Damaged or corroded VSS wiring or connector High
- Damaged tone ring or reluctor wheel on output shaft Moderate
- Transmission output shaft bearing wear affecting sensor gap Low
- PCM or instrument cluster fault Low
Step-by-Step Diagnostic Procedure
-
Road test while monitoring VSS signal with a scan tool -- compare to GPS speed reading
-
Inspect VSS connector for corrosion, bent pins, or loose connections
-
Check VSS output signal with an oscilloscope -- should show clean square wave pattern
-
Inspect tone ring on transmission output shaft for damaged or missing teeth
-
Measure VSS resistance with a multimeter -- typical range is 190-250 ohms for magnetic sensors
Common Fixes by Vehicle
What techs usually find when diagnosing P0501 on specific vehicles — tap your vehicle for the fix and the exact part:
1998-2009 Honda Accord 2.4L/3.0L Easy DIY
The vehicle speed sensor (VSS) on the transmission output shaft fails from fluid leaks and heat. If the speedometer stops working intermittently, the VSS is the likely cause. Replace with Dorman 917-632. Located on the transmission housing -- accessible from under the car without removing the trans.
Labor: 0.5-1 hour2003-2014 Toyota Corolla/Matrix 1.8L Easy DIY
The speed sensor signal is erratic due to metal debris on the sensor tip from normal transmission wear. Remove the speed sensor from the transmission, clean the magnetic tip with a rag, and reinstall. If the signal is still erratic, replace the sensor with a Dorman or OEM unit.
Labor: 30-45 minutes1999-2010 Chevrolet Silverado/GMC Sierra 5.3L Easy DIY
The vehicle speed sensor is in the transfer case on 4WD models and the transmission tail shaft on 2WD. A failing sensor causes erratic speedometer readings and harsh shifting. Replace with ACDelco 213-2831. Apply thread sealant to prevent transmission fluid leaks at the sensor bore.
Labor: 30-45 minutesFrequently Asked Questions
Can I drive with code P0501?
You can drive short distances, but be aware that the transmission may shift erratically and the speedometer may be inaccurate. Cruise control will likely not function. Avoid highway driving until repaired.
Where is the vehicle speed sensor located?
The VSS is typically located on the transmission output shaft housing, the transfer case, or on the rear differential. On newer vehicles, wheel speed sensors from the ABS system may also provide speed data to the PCM.
Can a bad speed sensor affect gas mileage?
Yes. The PCM uses vehicle speed data for fuel delivery calculations and transmission shift points. Incorrect speed data can result in improper shift timing and fuel delivery, reducing fuel economy.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0501 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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