P1E72 Buick Code - Hybrid/Electric Vehicle Battery 71 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
- P1E72 Buick indicates Hybrid/Electric Vehicle Battery 71 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 P1E72 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 P1E72 Buick?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1E72 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 P1E72 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 P1E72 Buick Code
What does the OBDII code P1E72 mean for a Buick?
The P1E72 code indicates an issue with the Hybrid/Electric Vehicle Battery 71 Circuit, typically related to the battery management system or a specific battery sensor.
What are the common symptoms of code P1E72 in a Buick?
Symptoms may include an illuminated check engine light, reduced hybrid or electric performance, limited driving range, or the vehicle entering limp mode.
What causes the P1E72 code to appear?
Common causes include a faulty battery cell sensor, wiring issues in the battery circuit, corrosion on electrical connectors, or a failure in the battery management system.
Can I drive my Buick with the P1E72 code active?
It’s not recommended to drive for extended periods, as this code may indicate potential battery degradation or operational issues that could lead to further damage.
How is the P1E72 code diagnosed?
A technician will use a scan tool to confirm the code, inspect the battery wiring and connectors, and test the battery management system and related circuits for faults.
What repairs are typically needed to fix the P1E72 code?
Repairs may involve replacing a faulty battery sensor, cleaning or repairing corroded wiring or connectors, or updating the vehicle’s battery management system firmware.
Can a low-voltage battery cause the P1E72 code?
While unlikely, a low or failing 12V battery can sometimes affect the hybrid battery system’s performance and trigger related codes.
How much does it cost to fix the P1E72 code on a Buick?
Repair costs vary but can range from $200 to $1,500, depending on whether the issue involves sensor replacement, wiring repair, or more extensive battery system work.
Is the P1E72 code covered under warranty?
If your Buick’s warranty covers the hybrid or electric battery system, repairs related to the P1E72 code may be included. Check your warranty details or consult your dealer.
Can clearing the P1E72 code with a scan tool fix the issue?
Clearing the code will reset the warning temporarily, but the underlying issue must be addressed to prevent the code from returning.
Discuss the causes and fixes for P1E72 Buick OBDII Code
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