Fault Code 4281

Fault code 4281

Brake fluid level

Diagnostic conditions






- Status of the brake fluid level switch is evaluated and displays an implausible value
- Short circuit to ground or open circuit in circuit to control module terminal 36
- The filtering time until the fault code is set is approx. 20 seconds

Possible cause of fault
- Brake fluid level too low
- Wiring/ plug connection faulty
- PSM hydraulic unit faulty

Affected terminals
Terminal 36

Diagnosis/troubleshooting