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Fault Code 4281



Fault Code 4281

Brake fluid level
Status of the brake fluid level switch is evaluated and displays an implausible value

Diagnostic conditions
- Ignition on
- Waiting time approx. 30 s

Waiting time approx. 30 s
- Brake fluid level too low
- Short circuit to B+/ground or open circuit
- PSM control unit faulty

Affected pins
Pin 36

Diagnosis/troubleshooting

Brake fluid level switch plug







If brake fluid reservoir level is too low, check if the 'Brake fluid level' warning light is lit and remove the cause for the low level.


Part 1:




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