P0B71 - Hybrid Battery Voltage Sense 'K' Circuit Intermittent/Erratic

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P0B71 Possible Causes

  • Faulty Battery smart unit
  • Faulty HV battery assembly

First diagnose P0B71 code

    Check 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.

Cost of diagnosing the P0B71 code

    Labor: 1.0

    The cost of diagnosing the P0B71 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

P0B71 Possible Symptoms

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

P0b71 Description

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).
OBDII Code P0b71 - Hybrid Battery Voltage Sense 'K' Circuit Intermittent/Erratic - AutoCodes.com

P0B71 More Information

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