AutoCodes – Generic – P1E50

P1E50 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 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 1,964

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

What does this mean?

What are the Possible Causes of the DTC P1E50?

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

How to Fix the DTC P1E50?

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 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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Need Help with the Code?

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Information for Specific Makes

P1E50 Buick — Hybrid/Electric Vehicle Battery 37 Circuit
P1E50 Cadillac — Hybrid/Electric Vehicle Battery 37 Circuit
P1E50 Chevrolet — Hybrid/Electric Vehicle Battery 37 Circuit
P1E50 GMC — Hybrid/Electric Vehicle Battery 37 Circuit
P1E50 Saturn — Hybrid/Electric Vehicle Battery 37 Circuit

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 Code

1. What does OBDII code P1E50 mean?

Code P1E50 indicates an issue with the Hybrid/Electric Vehicle Battery 37 Circuit, typically related to a fault in the wiring, connectors, or control module monitoring that specific battery cell or circuit.

2. What are the common symptoms of P1E50?

Symptoms may include the hybrid/EV system warning light turning on, reduced fuel efficiency, limited electric range, poor vehicle performance, or failure to start in EV mode.

3. What causes code P1E50 to appear?

This code can be caused by a faulty battery cell, damaged wiring, corroded or loose connectors, a malfunctioning battery control module, or software-related issues.

4. Can I drive with a P1E50 code?

Driving with a P1E50 code is not recommended, as it may indicate a serious issue with the hybrid battery system. Reduced performance and potential safety risks can occur if the problem worsens.

5. How is P1E50 diagnosed?

A technician will use a scan tool to confirm the code, inspect the battery circuit wiring and connectors, test the affected battery cell/module, and check for additional trouble codes.

6. How do you fix a P1E50 code?

Repairs may involve replacing faulty wiring, repairing or replacing the battery cell/module, updating software, or replacing the battery control module if necessary.

7. Is the P1E50 code specific to certain vehicles?

Yes, P1E50 is typically found in hybrid and electric vehicles from manufacturers like General Motors, but the exact meaning and repair process may vary by make and model.

8. How much does it cost to fix a P1E50 code?

Repair costs vary depending on the underlying issue. Minor repairs like wiring fixes may cost $100-$300, while replacing a battery module or control unit can cost $1,000 or more.

9. Can a weak 12V battery trigger a P1E50 code?

While unlikely, a weak 12V battery can sometimes cause communication or diagnostic errors in the hybrid system, so itâ€™s worth checking as part of the diagnostic process.

10. Will clearing the P1E50 code fix the problem?

Clearing the code will not fix the issue. The root cause must be diagnosed and repaired to prevent the code from returning.