C058D

Brake Booster Motor B Position Sensor Circuit High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$44–389 (est.)

Symptoms

Stiff or too light brake pedal
The brake warning light is on
Incorrect operation of the brake booster
Brake Assist error message appears on the display
Possible jerking when braking

Causes

Short circuit to power in position sensor wiring
Motor position sensor malfunction
Damage to the brake booster wiring harness
Oxidation or deformation of connector contacts
Malfunction of the brake booster control unit

How to Fix

Read error codes and check position sensor data with a scanner
Measure the voltage at the sensor output - compare with the norm for this model
Check wiring for short to power (+12V)
Inspect the sensor connector for damage and oxidation.
Replace the faulty sensor or repair the wiring
After repair, calibrate the brake booster

Related codes

C058C C058E C0580