U025E

Lost Communication With Electronic Brake Booster Control Module A

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

The brake system warning light comes on
Increased brake pedal force
Loss of emergency braking assistance functions
Activating emergency brake operation
Errors in other CAN bus-related systems

Causes

Open or short circuit in the module communication circuit
Malfunction of the electric brake booster module
Problems with module power supply (blown fuse)
Corrosion or poor contact in connectors
Vehicle CAN bus malfunction

How to Fix

Check fuses related to the brake system
Inspect the connectors and wiring of the electric amplifier module
Check the module supply voltage
Scan the CAN bus for communication errors
Repair only from an authorized dealer

Related codes

U025F U0260 U0121