VCLEFT_a255 — LV Overcharge Instc
Full alert identifier: VCLEFT_a255_LVOverchargeInstc
Alert description
After a single discharge and recharge cycle, the low voltage (LV) battery has been overcharged by more than 5 Amp hours (Ah) compared to initial charge level. If this continues, it may indicate a condition affecting LV battery performance that makes replacement necessary. May also indicate aftermarket device(s) installed on the vehicle, whose current draw interferes with LV battery management.
Potential impact
10 independent instances of this alert indicate a chronic overcharge condition that may require LV battery replacement to resolve, and at least one other alert should be present to indicate that condition.
Set condition
Over a single charge cycle, the LV battery has recharged by more than 5Ah compared to the power initially discharged.
Clear condition
The LV battery is no longer recharging by more than 5Ah compared to the amount discharged.
Signals to check
These diagnostic fields are associated with VCLEFT_a255. Check the alert's Alert Log in Service Mode Plus for available values.
| Signal | Unit |
|---|---|
IBS Current
VCLEFT_
|
A |
IBS Volts
VCLEFT_
|
V |
LV Battery Temp
VCLEFT_
|
degC |
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCLEFT_a255.