P1E79 Buick Code - Hybrid/Electric Vehicle Battery 78 Circuit
Quick Answer
The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. 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
- P1E79 Buick indicates Hybrid/Electric Vehicle Battery 78 Circuit.
- Common causes
- Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
- 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.
Code P1E79 Buick Description
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.
What are the Possible Causes of the DTC P1E79 Buick?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1E79 Buick?
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 P1E79 Buick 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.
Need more information about the P1E79 Buick code?
Need more information on how to fix the P1E79 Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1E79 Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1E79 Buick Code
Q: What does the OBDII code P1E79 mean on a Buick?
A: The code P1E79 indicates an issue with the Hybrid/Electric Vehicle Battery 78 Circuit, typically related to the battery monitoring system.
Q: What are the common symptoms of a P1E79 code in a Buick?
A: Symptoms may include warning lights on the dashboard, reduced fuel efficiency, limited hybrid/electric vehicle performance, or difficulty starting the vehicle.
Q: What causes the P1E79 code to appear in a Buick?
A: Common causes include a faulty battery cell, wiring issues, connector problems, or a malfunction in the battery control module.
Q: Can I drive my Buick with a P1E79 code?
A: While the vehicle may still be operable, driving with this code can lead to reduced performance or further damage to the hybrid/electric system. It’s best to address the issue promptly.
Q: How do you diagnose the P1E79 code in a Buick?
A: Diagnosis typically involves scanning for the code, inspecting the battery circuit wiring and connectors, and testing the battery control module for faults.
Q: How much does it cost to repair a P1E79 code on a Buick?
A: Repair costs can vary depending on the issue but may range from $100 for simple wiring repairs to over $1,000 if the battery control module or battery pack needs replacement.
Q: Can a weak 12-volt battery cause the P1E79 code in a Buick?
A: Yes, a weak or failing 12-volt battery can sometimes trigger hybrid/electric system-related codes, including P1E79.
Q: Is the P1E79 code specific to Buick vehicles?
A: While P1E79 is common in Buick hybrid/electric vehicles, similar codes may appear in other GM brands with hybrid systems.
Q: Can I clear the P1E79 code without fixing the problem?
A: Clearing the code might remove the warning temporarily, but the underlying issue will likely cause the code to return. Proper diagnosis and repair are essential.
Q: Do I need specialized tools to fix the P1E79 code on a Buick?
A: Yes, diagnosing and repairing hybrid/electric system issues typically require advanced diagnostic tools and knowledge of high-voltage systems.
Discuss the causes and fixes for P1E79 Buick OBDII Code
Code P1E79 Buick comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
