P0502 - Vehicle Speed Sensor Low Input

Vehicle speed sensor signal is too low or missing.

Code Overview

Vehicle speed sensor signal is too low or missing.

Common Causes

• Failed speed sensor
• Short to ground
• Tone ring damage
• Wiring issue

Diagnostic Steps

1. Watch speed PID during a road test
2. Inspect the sensor and tone ring area
3. Check the signal circuit for damage

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.