AutoCodes – Buick – P1E50 Buick

P1E50 Buick Code - Hybrid/Electric Vehicle Battery 37 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: P1E50 Buick indicates Hybrid/Electric Vehicle Battery 37 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.

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Code Popularity 811

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E50 Buick Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in-series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
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.

OBDII Code P1E50 Buick - Hybrid/Electric Vehicle Battery 37 Circuit - AutoCodes.com — P1E50 Buick Code - Hybrid/Electric Vehicle Battery 37 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E50 Buick?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P1E50 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 P1E50 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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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 P1E50 Buick Code

1. What does the OBDII code P1E50 mean for a Buick?

Code P1E50 indicates an issue with the Hybrid/Electric Vehicle (HEV) Battery 37 Circuit, which is specific to the vehicle's high-voltage battery system.

2. What are common symptoms of the P1E50 code in a Buick?

Symptoms may include a check engine light, reduced hybrid or electric vehicle performance, limited power, or the vehicle not switching to electric mode.

3. What causes the P1E50 code in a Buick?

Common causes include a faulty battery module or sensor, wiring issues in the high-voltage battery circuit, or a malfunction in the battery control module.

4. Can I continue driving my Buick with the P1E50 code?

Itâ€™s not recommended to drive for extended periods as the issue may worsen, and the vehicle could enter a reduced power mode or fail to start.

5. How is the P1E50 code diagnosed?

Technicians use a scan tool to check for additional codes, inspect the high-voltage battery circuit wiring, and test the battery control module and related components.

6. What repairs can fix the P1E50 code?

Repairs may involve replacing a faulty battery module, repairing damaged wiring in the circuit, or reprogramming or replacing the battery control module.

7. Is the P1E50 code covered under warranty for my Buick?

It depends on your vehicle's warranty terms, but many high-voltage battery components are covered under extended warranties for hybrid or electric vehicles.

8. How much does it cost to repair the P1E50 code on a Buick?

Repair costs vary depending on the issue but can range from $200 for wiring repairs to over $1,000 for battery module replacement.

9. Can a low 12-volt battery cause the P1E50 code?

While unlikely, a weak 12-volt battery can sometimes affect hybrid system diagnostics, so itâ€™s worth checking and charging or replacing it if needed.

10. How can I prevent the P1E50 code from occurring again?

Regular maintenance of the high-voltage battery system, keeping software up to date, and avoiding extreme driving conditions can help prevent this issue.