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P1B92 GMC Code - Hybrid/Electric Vehicle Battery 58 Circuit High Voltage

Quick Answer

The P1B92 diagnostic trouble code (DTC) specifically pertains to hybrid and electric vehicles, indicating an issue with the high-voltage circuit of the battery, particularly the 58 circuit. Common causes include Faulty battery management system (BMS) that fails to regulate voltage properly, Damaged wiring or connectors in the high-voltage circuit, leading to short circuits or open circuits, Malfunctioning voltage sensors that provide inaccurate readings to the ECU. 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
P1B92 GMC indicates Hybrid/Electric Vehicle Battery 58 Circuit High Voltage.
Common causes
Common causes include Faulty battery management system (BMS) that fails to regulate voltage properly, Damaged wiring or connectors in the high-voltage circuit, leading to short circuits or open circuits, Malfunctioning voltage sensors that provide inaccurate readings to the ECU.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 17, 2024
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Code P1B92 GMC Description

The P1B92 diagnostic trouble code (DTC) specifically pertains to hybrid and electric vehicles, indicating an issue with the high-voltage circuit of the battery, particularly the 58 circuit. This code suggests that the voltage detected in this circuit is higher than the manufacturer's specified threshold. High voltage in the battery management system can lead to various performance issues, including diminished power output, reduced efficiency, and potential overheating of components.

OBDII Code P1B92 GMC - Hybrid/Electric Vehicle Battery 58 Circuit High Voltage
P1B92 GMC Code - Hybrid/Electric Vehicle Battery 58 Circuit High Voltage

Common Causes of P1B92 GMC

  1. Faulty battery management system (BMS) that fails to regulate voltage properly.
  2. Damaged wiring or connectors in the high-voltage circuit, leading to short circuits or open circuits.
  3. Malfunctioning voltage sensors that provide inaccurate readings to the ECU.
  4. Overcharging of the battery due to a defective charging system or inverter.
  5. Internal battery cell failure, causing an imbalance in voltage levels across the battery pack.

Symptoms of P1B92 GMC

  1. Reduced acceleration or power output from the vehicle.
  2. Warning lights illuminated on the dashboard, particularly the battery or check engine light.
  3. Frequent battery charging cycles or a decrease in overall battery range.
  4. Unusual noises or overheating from the battery pack.
  5. Inconsistent performance of hybrid/electric systems, such as regenerative braking.

How to Fix P1B92 GMC

  1. Diagnostic Assessment: Begin with a comprehensive diagnostic scan to confirm the P1B92 code and check for any additional codes that may provide further insight into the issue.
  2. Visual Inspection: Conduct a thorough visual inspection of the high-voltage wiring, connectors, and battery management system for signs of damage, corrosion, or loose connections.
  3. Testing Components: Test the voltage sensors and battery management system to ensure they are functioning correctly and providing accurate readings.
  4. Battery Evaluation: If necessary, perform a load test on the battery to assess its health and determine if any cells are failing or if the battery needs replacement.
  5. Repair or Replacement: Depending on the findings, repair any damaged wiring or connectors, replace faulty sensors, or, if the battery is compromised, consider a battery replacement.

Cost to Fix P1B92 GMC

The cost to address the P1B92 code can vary widely based on the specific diagnosis and repairs needed. Typical repair costs may range from $200 to $1,500 or more. This estimate includes parts and labor, with labor rates typically falling between $80 and $150 per hour. Factors such as location, vehicle make and model, and engine type can significantly influence the final cost. For example, repairs at a dealership or in metropolitan areas may be on the higher end of the scale, while independent shops may offer more competitive rates. It is advisable to obtain quotes from local repair shops for a more precise estimate tailored to your specific situation.

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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 P1B92 GMC Code

1. What does the OBDII code P1B92 mean on a GMC vehicle?

P1B92 indicates an issue with the Hybrid/Electric Vehicle Battery 58 Circuit experiencing high voltage, often pointing to a fault in the battery or wiring.

2. What are the common symptoms of a P1B92 code?

Symptoms may include warning lights on the dashboard, reduced fuel efficiency, limited power output, or the vehicle entering limp mode.

3. What causes the P1B92 code to be triggered?

Common causes include a malfunctioning hybrid battery module, high resistance in wiring or connectors, or a fault in the hybrid battery control module.

4. Can I drive my GMC with the P1B92 code present?

It is not recommended, as the vehicle may experience reduced performance or further damage to the hybrid system components.

5. How do you diagnose a P1B92 code?

Diagnosis involves checking the battery voltage, inspecting wiring and connectors for damage or corrosion, and scanning the hybrid system for additional trouble codes.

6. Can a weak 12-volt battery cause the P1B92 code?

While unlikely, a weak 12-volt battery can sometimes contribute to hybrid system errors. It’s best to test the battery and rule it out.

7. What repairs are typically needed to fix the P1B92 code?

Repairs may include replacing the hybrid battery module, repairing or replacing damaged wiring, or reprogramming the hybrid control module.

8. How much does it cost to fix the P1B92 code on a GMC?

Costs can vary widely depending on the specific issue, with minor wiring repairs being less expensive and hybrid battery replacement potentially costing several thousand dollars.

9. Can clearing the P1B92 code fix the problem?

Clearing the code without addressing the root cause will not fix the problem, and the code is likely to return.

10. Does the P1B92 code affect fuel economy?

Yes, a malfunction in the hybrid system can reduce fuel efficiency due to improper battery performance or increased reliance on the gas engine.

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