P1E7B Buick Code - Hybrid/Electric Vehicle Battery 80 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
- P1E7B Buick indicates Hybrid/Electric Vehicle Battery 80 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 P1E7B 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 P1E7B Buick?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1E7B 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 P1E7B 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.
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Frequently Asked Questions about P1E7B Buick Code
What does the OBDII code P1E7B mean for a Buick?
P1E7B indicates an issue with the Hybrid/Electric Vehicle Battery 80 Circuit, often related to a malfunction in the battery system or its associated wiring.
What are common symptoms of the P1E7B code in a Buick?
Symptoms may include a warning light on the dashboard, reduced hybrid/electric performance, lower fuel efficiency, or the vehicle entering a limp mode.
What causes the P1E7B code to appear in a Buick?
Possible causes include damaged or corroded wiring, a faulty battery module, a malfunctioning battery control module, or poor electrical connections in the circuit.
Can you drive a Buick with a P1E7B code?
It’s not recommended to drive for extended periods, as the issue can worsen and potentially lead to a complete loss of hybrid/electric functionality.
How is the P1E7B code diagnosed?
A technician will use a scan tool to verify the code, inspect the battery system for damage or corrosion, and test the wiring and connectors for proper voltage and continuity.
What repairs can fix the P1E7B code in a Buick?
Repairs may include replacing damaged wiring, repairing or replacing the battery control module, or addressing issues with the battery pack itself.
How much does it cost to fix a P1E7B code in a Buick?
The cost varies depending on the issue, ranging from $100 for minor wiring repairs to over $1,000 if the battery module or control unit needs replacement.
Can a low-voltage condition trigger the P1E7B code?
Yes, a low-voltage condition in the hybrid/electric battery system can cause this code, often due to a failing battery module or poor electrical connections.
Is the P1E7B code specific to Buick vehicles?
While P1E7B is more common in hybrid and electric Buick models, it can also appear in other GM vehicles using similar systems.
Can clearing the P1E7B code fix the problem?
Clearing the code may temporarily turn off the warning light, but the underlying issue must be addressed to prevent the code from returning.
Discuss the causes and fixes for P1E7B Buick OBDII Code
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