AutoCodes – Generic – P0B80

P0B80 Code - Hybrid Battery Voltage Sense 'N' Circuit Intermittent/Erratic

Quick Answer

The HV battery uses nickel metal-hydride batteries and does not require external charging. Common causes include Faulty Battery smart unit, Faulty HV battery assembly. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0B80 indicates Hybrid Battery Voltage Sense 'N' Circuit Intermittent/Erratic.
Common causes: Common causes include Faulty Battery smart unit, Faulty HV battery assembly.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,937

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B80 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 P0B80 - Hybrid Battery Voltage Sense 'N' Circuit Intermittent/Erratic - AutoCodes.com — P0B80 Code - Hybrid Battery Voltage Sense 'N' Circuit Intermittent/Erratic

What does this mean?

What are the Possible Causes of the DTC P0B80?

Faulty Battery smart unit
Faulty HV battery assembly

How to Fix the DTC P0B80?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0B80 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0B80 Code

1. What does code P0B80 mean?

Code P0B80 indicates an issue with the Hybrid Battery Voltage Sense 'N' Circuit, where the voltage readings are intermittent or erratic.

2. What are the common symptoms of P0B80?

Common symptoms include an illuminated check engine light, reduced hybrid system performance, decreased fuel efficiency, or the vehicle not switching to electric mode.

3. What causes the P0B80 code?

Possible causes include a faulty hybrid battery voltage sensor, damaged or corroded wiring or connectors, a failing hybrid battery module, or issues with the hybrid control module.

4. How is the P0B80 code diagnosed?

A technician will use an OBDII scanner to confirm the code, inspect the hybrid battery system for faults, and test the voltage sensor circuit for irregularities.

5. Can I drive with the P0B80 code?

Driving with this code is not recommended, as it may cause further damage to the hybrid battery system or reduce vehicle performance significantly.

6. How do you fix a P0B80 code?

Repairs may involve replacing the hybrid battery voltage sensor, repairing or replacing damaged wiring or connectors, or replacing the hybrid battery module if necessary.

7. Does the P0B80 code mean my hybrid battery is failing?

Not necessarily. While a failing hybrid battery is a potential cause, the issue could also be due to a faulty sensor or wiring problem.

8. How much does it cost to fix a P0B80 code?

The repair cost depends on the root cause. Sensor or wiring repairs may cost a few hundred dollars, while hybrid battery replacement can cost several thousand dollars.

9. Can a weak 12-volt battery trigger the P0B80 code?

A weak 12-volt battery is unlikely to directly trigger this code, but it can cause other hybrid system issues that may indirectly contribute.

10. What tools are needed to troubleshoot the P0B80 code?

Troubleshooting requires an OBDII scanner with hybrid system capability, a multimeter for voltage testing, and a wiring diagram for the hybrid battery system.