The automobile fault code P0B71 indicates a problem with the battery smart unit or the HV battery assembly.

The most common symptom is the engine light being illuminated or the service engine soon warning light. To fix this issue, you should visually inspect the wiring harness and connectors for any damage.

Look out for broken, bent, pushed out, or corroded connector pins.

The repair time for this fault code is estimated to be around 1.0.

It is important to address this issue promptly to prevent further damage to the vehicle’s battery system.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you see the Engine Light ON or the Service Engine Soon Warning Light, it could be a sign of the p0b71 fault code.

  • The symptoms of the automobile fault code p0b71 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p0b71 can be caused by a faulty Battery smart unit or a faulty HV battery assembly.

  • The fault code p0b71 can be caused by a faulty Battery smart unit or a faulty HV battery assembly.

To fix the automobile fault code p0b71, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p0b71, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
  • This fix is estimated to take approximately 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p0b71 are the estimated repair time of 1.0 hour and the typical auto repair shop charges of $75 to $150 per hour.

The P0B71 fault code refers to the Hybrid Battery Voltage Sense ‘K’ Circuit IntermittentErra.

This code is related to the HV battery in hybrid vehicles, which uses nickel metal-hydride batteries and does not require external charging. The power management control ECU is responsible for maintaining the state of charge (SOC) of the HV battery at a constant level during driving. The HV battery is made up of 28 modules, with each module consisting of eight 1.2 V cells in series.

The battery smart unit monitors the voltage of the battery blocks at 14 locations. Each battery block is composed of 2 modules in a set.

If the voltage difference between the battery blocks exceeds the standard, the battery smart unit detects a malfunction.

When the malfunction detection condition is met, the power management control ECU (HV CPU) will illuminate the Malfunction Indicator Lamp (MIL) and set the P0B71 Diagnostic Trouble Code (DTC). This code indicates an intermittent or error in the Hybrid Battery Voltage Sense ‘K’ Circuit. It is important to address this issue promptly to ensure the proper functioning of the HV battery system in the hybrid vehicle.

What are the possible causes for the automobile fault code P0B71?

If you see the engine light or service engine soon warning light on, the fault code P0B71 could be the culprit. This code is often caused by a faulty battery smart unit or a faulty HV battery assembly. To fix the issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. It’s important to address these possible causes to get your automobile back in top shape.

How can I visually inspect the wiring harness and connectors to fix the P0B71 fault code?

If you’re dealing with the P0B71 fault code and your engine light is on, it’s time to take action. The most common causes are a faulty battery smart unit or a faulty HV battery assembly. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any signs of damage, such as broken or bent pins, corrosion, or components that are out of place. This simple step can help you identify and resolve the problem. Don’t delay, get to the bottom of it now!

What should I look for when checking for damaged components and connector pins to resolve the P0B71 fault code?

When resolving the P0B71 fault code, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. This can help identify any issues with the battery smart unit or the HV battery assembly, which are common causes of the fault code. Taking these steps can help you pinpoint the problem and take appropriate action to fix it.

p0b71 error fault code explained

If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light, the p0b71 fault code might be the culprit. This code is usually caused by a faulty Battery smart unit or a faulty HV battery assembly. To fix it, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.

Scroll to Top