1. Check the VSS Wiring:
- Locate the VSS on your Mustang. It's usually near the transmission, near the driveshaft or on top of the differential housing.
- Disconnect the electrical connector from the VSS.
- Inspect the wiring harness for any damage, corrosion, or loose connections.
- Replace the wiring harness if necessary.
2. Test the VSS Output Signal:
- Reconnect the electrical connector to the VSS.
- Start your Mustang and let it idle.
- Use a multimeter to measure the voltage output of the VSS.
- The voltage should fluctuate between 0 and 5 volts as the wheels rotate.
- If the voltage reading is not correct or doesn't change, replace the VSS.
3. Clean the VSS Mounting Surface:
- Remove the VSS from its mounting location.
- Clean the mounting surface of the VSS and transmission or differential where it mounts to remove any dirt or debris.
- Reinstall the VSS, ensuring it's securely fastened.
4. Check for Metal Shavings:
- Inspect the VSS for metal shavings or particles around it.
- If there are metal shavings, it could indicate a problem with the transmission or differential.
- Consult a qualified mechanic for further assistance if you find metal shavings.
5. Check Transmission Fluid Level:
- Ensure that the transmission fluid level is correct and top it off if necessary. Low fluid levels can cause issues with the VSS.
6. Reset the Trouble Code:
- Once you have completed the necessary repairs or fixes, connect an OBD-II scanner to your Mustang's diagnostic port.
- Clear the trouble code P1519 from the vehicle's computer.
After following these steps, test drive your Mustang to confirm the P1519 code has been resolved and the vehicle's speedometer is functioning correctly. If the issue persists or you're uncomfortable performing these steps, it's best to consult a qualified mechanic for assistance.
