P0503

Vehicle Speed Sensor A Circuit Intermittent/Erratic/High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Incorrect speedometer readings
Cruise control failure
Gear shifting problems
Unstable engine operation at idle

Causes

Faulty Speed Sensor (VSS)
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Damage to the sensor drive gear
Malfunction of the control unit (ECU)

How to Fix

Check the condition of the speed sensor and its connection
Inspect the wiring for damage
Check the sensor resistance (compare with standards)
Check the presence of a signal from the sensor while driving
If necessary, replace the sensor or repair the wiring

Related codes

P0500 P0501 P0502