IBST_a020 — VPREU5 V Out Of Range
Full alert identifier: IBST_a020_VPREU5VOutOfRange
Message shown in the car
Power braking assist reduced Braking may require increased effort
Alert description
iBooster (IBST) monitoring of voltage pre-charge (VPRE) U5V over and undervoltage bits has detected an out of range value.
Potential impact
IBST may not operate as expected.
Set condition
IBST monitoring of VPRE U5V over and undervoltage bits detects an out of range value.
Clear condition
iBooster can not recover from this condition. iBooster replacement may be required.
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of IBST_a020.