P1E04 Buick Code - Hybrid/Electric Vehicle Battery 96 Circuit Performance
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
- P1E04 Buick indicates Hybrid/Electric Vehicle Battery 96 Circuit Performance.
- 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 P1E04 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 P1E04 Buick?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1E04 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 P1E04 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 P1E04 Buick Code
What does the OBDII code P1E04 mean for a Buick?
Code P1E04 indicates a performance issue with the Hybrid/Electric Vehicle Battery 96 Circuit, typically related to the battery's monitoring or communication system.
What are common symptoms of code P1E04 in a Buick?
Symptoms may include a check engine light, reduced hybrid functionality, decreased fuel efficiency, or loss of electric power assistance.
What causes the P1E04 code to appear in a Buick?
Common causes include wiring or connector issues, a malfunctioning battery control module, or internal faults within the hybrid battery pack.
Can driving with the P1E04 code damage my Buick?
Driving with this code may reduce vehicle performance and could lead to further damage to the hybrid battery system if not addressed promptly.
How can I diagnose code P1E04 in my Buick?
Start by inspecting the battery circuit wiring and connectors for damage or corrosion, then check the hybrid battery control module for faults using a diagnostic tool.
Is the P1E04 code specific to Buick hybrid vehicles?
Yes, this code is specific to Buick models equipped with a hybrid or electric vehicle battery system.
How much does it typically cost to repair code P1E04 in a Buick?
Repair costs vary depending on the cause but can range from $200 for wiring repairs to over $1,000 for hybrid battery module replacement.
Can I clear the P1E04 code without fixing the problem?
Clearing the code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely return.
What tools are needed to troubleshoot code P1E04 in a Buick?
A diagnostic scanner capable of reading hybrid-specific codes and a multimeter for testing wiring and connectors are essential for troubleshooting.
Should I take my Buick to a dealer for P1E04 repairs?
While independent repair shops may be able to fix the issue, a dealership may provide specialized knowledge and equipment for hybrid system repairs.
Discuss the causes and fixes for P1E04 Buick OBDII Code
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