Engine-Codes - Toyota - P0B8D TOYOTA

P0B8D TOYOTA - Hybrid Battery Voltage Sense 'Q' Circuit Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0B8D TOYOTA Possible Causes

  • Faulty Battery smart unit
  • Faulty HV battery assembly

How is the P0B8D TOYOTA code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P0B8D TOYOTA code

Labor: 1.0

The cost to diagnose the P0B8D TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0B8D TOYOTA 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 is composed of 28 modules, and each module consists of eight 1.2 V cells in series. The battery smart unit monitors battery block voltage at 14 locations. Each battery block is composed of 2 modules in a set. The battery smart unit, which monitors the voltage of the battery blocks, determines that malfunction has occurred if a voltage difference between the battery blocks exceeds the standard. When the malfunction detection condition is satisfied, the power management control ECU (HV CPU) will illuminates the Malfunction Indicator Lamp (MIL) and set a Diagnostic Trouble Code (DTC).

More Information

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