C0505

Left Front Wheel Speed Sensor A Correlation

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

ABS/ESP indicator is on
Unstable operation of the ABS system
Loss of ESP functions
Incorrect speedometer readings

Causes

Damage to the wheel speed sensor
Sensor or ring gear dirty
Open or short circuit in wiring harness
ABS module malfunction
Connection problems or contact corrosion

How to Fix

Check the visual condition of the sensor and ring gear
Clean the sensor and crown from dirt
Check resistance and integrity of wiring harness
Check the sensor signal with an oscilloscope
Replace sensor if necessary
Check the operation of the system after repair

Related codes

C0500 C0501 C0506 C1234