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P1E04 GMC Code - Hybrid/Electric Vehicle Battery 96 Circuit Performance

Quick Answer

The P1E04 code indicates a performance issue within the 96 circuit of the hybrid or electric vehicle battery system. Common causes include Faulty battery cells within the high-voltage battery pack, Poor electrical connections or damaged wiring in the 96 circuit, Malfunctioning battery management system (BMS) or software issues. 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
P1E04 GMC indicates Hybrid/Electric Vehicle Battery 96 Circuit Performance.
Common causes
Common causes include Faulty battery cells within the high-voltage battery pack, Poor electrical connections or damaged wiring in the 96 circuit, Malfunctioning battery management system (BMS) or software issues.
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 18, 2024
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Code P1E04 GMC Description

The P1E04 code indicates a performance issue within the 96 circuit of the hybrid or electric vehicle battery system. This code is specific to General Motors (GMC) vehicles and typically points to a malfunction in the battery management system (BMS) or the high-voltage battery pack itself. The BMS is responsible for monitoring the state of charge, health, and performance of the battery cells, ensuring they operate within safe limits. When the BMS detects that the performance of the 96 circuit falls outside of specified parameters, it triggers the P1E04 code.

OBDII Code P1E04 GMC - Hybrid/Electric Vehicle Battery 96 Circuit Performance
P1E04 GMC Code - Hybrid/Electric Vehicle Battery 96 Circuit Performance

Common Causes of P1E04 GMC

  1. Faulty battery cells within the high-voltage battery pack.
  2. Poor electrical connections or damaged wiring in the 96 circuit.
  3. Malfunctioning battery management system (BMS) or software issues.
  4. Corrosion or dirt buildup on battery terminals or connectors.
  5. Environmental factors such as extreme heat or cold affecting battery performance.

Symptoms of P1E04 GMC

  1. Reduced acceleration or power output when driving.
  2. Warning lights illuminated on the dashboard, particularly the check engine light or battery warning light.
  3. Decreased electric range or battery life during operation.
  4. Unusual noises or vibrations from the battery pack area.
  5. Intermittent or complete loss of hybrid/electric functionality.

How to Fix P1E04 GMC

  1. Diagnostic Testing: Begin with a thorough diagnostic scan to confirm the P1E04 code and check for any related codes that may provide additional context.
  2. Visual Inspection: Inspect the wiring harness and connectors associated with the 96 circuit for signs of damage, corrosion, or loose connections.
  3. Battery Testing: Conduct a load test on the battery cells to determine if any cells are failing or underperforming.
  4. BMS Update or Replacement: If the BMS is found to be faulty, it may require a software update or replacement to restore proper functionality.
  5. Repair or Replace Components: Depending on the findings, repair damaged wiring or connectors, replace faulty battery cells, or address any other identified issues.

Cost to Fix P1E04 GMC

The typical repair costs for addressing the P1E04 code can vary widely based on the specific diagnosis and repairs needed. On average, you can expect to pay between $200 and $1,500, depending on whether it involves simple wiring repairs or more extensive battery pack replacements. Labor rates at auto repair shops can range from $80 to $150 per hour, with metropolitan areas or dealerships often charging higher rates. Independent shops may offer more competitive pricing. It's advisable to check local rates and obtain multiple quotes for a more precise estimate based on your vehicle's specific needs.

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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 P1E04 GMC Code

1. What does the OBDII code P1E04 mean for GMC vehicles?

The P1E04 code indicates an issue with the Hybrid/Electric Vehicle Battery 96 Circuit Performance, often related to a fault in the battery monitoring system or a specific sensor.

2. What are the common symptoms of the P1E04 code on a GMC vehicle?

Symptoms may include an illuminated check engine light, reduced hybrid/electric performance, decreased fuel efficiency, and potential warnings for the hybrid system.

3. What causes the P1E04 code to appear in GMC vehicles?

The code can be triggered by a faulty battery sensor, damaged wiring or connectors in the circuit, a malfunctioning battery control module, or degraded battery cells.

4. Can the P1E04 code cause drivability issues?

Yes, depending on the severity, it can lead to reduced power output, limited electric driving range, or the vehicle entering a limp mode to prevent further damage.

5. How is the P1E04 code diagnosed?

A technician will use an advanced scan tool to read the code and check for related codes, inspect the battery management system, and test the wiring, sensors, and control module for faults.

6. Can I drive my GMC vehicle if it has the P1E04 code?

It’s not recommended to drive the vehicle for extended periods, as the hybrid system may be compromised, potentially leading to further damage or unsafe driving conditions.

7. What repairs are typically needed to fix the P1E04 code?

Repairs may include replacing a faulty battery sensor, repairing or replacing damaged wiring or connectors, reprogramming the battery control module, or addressing internal battery cell issues.

8. How much does it cost to fix the P1E04 code on a GMC vehicle?

The cost varies depending on the root cause, ranging from $100–$300 for minor electrical repairs to $1,000 or more if the hybrid battery or control module requires replacement.

9. Can a low 12-volt auxiliary battery cause the P1E04 code?

While unlikely, a weak or failing 12-volt battery could indirectly affect the hybrid system’s performance and should be checked as part of the diagnosis.

10. Is the P1E04 code covered under warranty for GMC hybrid vehicles?

Depending on the vehicle’s age and mileage, the code may be covered under the hybrid system or battery warranty. Check with your dealership for specific warranty details.

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