P0B49 Possible Causes
- Faulty battery smart unit
- Faulty HV battery assembly
What Does It Mean?
How to Fix Code P0B49
Check the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0B49 Possible Symptoms
Engine light on (or service engine soon warning light)
P0B49 Meaning
The HV battery uses nickel-metal hydride batteries and does not require external charging. The power management control ECU controls the SOC (state of charge) of the HV battery at a constant level during driving. The HV battery consists of 28 modules, and each module consists of eight 1.2V cells 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 voltage of the battery blocks, determines that a malfunction has occurred if the voltage difference between the battery blocks exceeds the standard. When the malfunction detection condition is met, the power management control ECU (HV CPU) illuminates the malfunction indicator light (MIL) and sets a diagnostic trouble code (DTC).