C0587

Brake Booster Motor A Position Sensor Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Hard brake pedal
Increased braking force
The brake system fault light comes on
Reduced braking performance

Causes

Open or shorted wiring harness
Motor position sensor malfunction
Poor contact in connectors
Damage to the brake booster control unit
Contact corrosion

How to Fix

Check the integrity of the wiring harness and connectors
Clean contacts from oxidation
Check the resistance of the position sensor
Replace sensor if necessary
Scan the control unit for additional errors

Related codes

C0588 C0589 C0590