P0B8A Possible Causes
- Faulty Battery Smart Unit
- Faulty HV Battery Assembly
What Does It Mean?
How to Fix P0B8A Code
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
P0B8A Possible Symptoms
Check Engine Light On (or Service Engine Soon Warning Light)
P0B8A Meaning
The HV battery uses nickel-metal hydride batteries and does not require external charging. The Power Management Control ECU maintains the HV battery’s SOC (State of Charge) at a constant level during driving. The HV battery consists of 28 modules, with each module containing eight 1.2V cells connected in series. The Battery Smart Unit monitors the battery block voltage at 14 locations. Each battery block is composed of 2 modules in an assembly. The Battery Smart Unit, which monitors the battery block voltages, detects a malfunction if the voltage difference between battery blocks exceeds the standard. When the malfunction detection condition is met, the Power Management Control ECU (HV CPU) illuminates the Malfunction Indicator Lamp (MIL) and sets a Diagnostic Trouble Code (DTC).