C0151
Regen Braking Blend Control Malfunction
2001-2005 BMW 325i E46 2.5L I6 M54
Moderate SeverityChassisGeneric (SAE)
Description
The system that blends regenerative and friction braking is not operating correctly.
Symptoms
- Braking feel inconsistent
- Pedal effort changes
- Jerky deceleration
- Reduced regenerative braking recovery
Common Causes
- Brake pedal simulator malfunction
- Hydraulic control unit fault
- Communication latency between modules
- Software calibration error
Diagnostic Steps
- Monitor regen vs friction brake split with scan tool
- Check brake pedal simulator operation
- Verify module communication timing
- Test hydraulic actuator response
- Check for software updates
Repair Notes
Diagnose blend control actuators. Software update may be available.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0151 on Other Vehicles
Common Questions
What does code C0151 mean on a 2001-2005 BMW 325i E46?
C0151 stands for "Regen Braking Blend Control Malfunction". The system that blends regenerative and friction braking is not operating correctly.
What are the symptoms of C0151 on a BMW 325i E46?
Common symptoms of C0151 include: Braking feel inconsistent, Pedal effort changes, Jerky deceleration, Reduced regenerative braking recovery.
What causes C0151 on a 2001-2005 BMW 325i E46?
Common causes of C0151 include: Brake pedal simulator malfunction, Hydraulic control unit fault, Communication latency between modules, Software calibration error.