Fuel / brake / bypass valve Engine brake solenoid valve
B414 · B414 engine brake solenoid cyl 4
Cylinder 4 MX engine brake solenoid group for B414 and P3425/P3427/P3428/P3429/P3431/P3432 searches.
Defect symptoms
- MX engine brake noticeably weaker than normal
- Engine brake force drops as RPM falls
- DAVIE4 brake actuator self-test fails on cylinder 4
- Audible irregular cadence of engine brake on overrun
- Fault appears after hot soak or long descent