AutoCodes – Generic – P1E55

P1E55 Code - Hybrid/Electric Vehicle Battery 42 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: P1E55 indicates Hybrid/Electric Vehicle Battery 42 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 1,104

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 Mar 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E55 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 P1E55 - Hybrid/Electric Vehicle Battery 42 Circuit - AutoCodes.com — P1E55 Code - Hybrid/Electric Vehicle Battery 42 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E55?

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

How to Fix the DTC P1E55?

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 P1E55 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

P1E55 Buick — Hybrid/Electric Vehicle Battery 42 Circuit
P1E55 Cadillac — Hybrid/Electric Vehicle Battery 42 Circuit
P1E55 Chevrolet — Hybrid/Electric Vehicle Battery 42 Circuit
P1E55 GMC — Hybrid/Electric Vehicle Battery 42 Circuit
P1E55 Saturn — Hybrid/Electric Vehicle Battery 42 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 P1E55 Code

1. What are common symptoms of OBDII code P1E55 (Hybrid/Electric Vehicle Battery 42 Circuit)?

- Common symptoms include loss of power, decreased fuel efficiency, and potential starting issues in hybrid or electric vehicles.

2. What are the possible causes of OBDII code P1E55?

- The code P1E55 can be triggered by issues such as a faulty battery 42 circuit, damaged wiring, or a malfunctioning battery management system in hybrid or electric vehicles.

3. How can I diagnose the OBDII code P1E55?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault code, followed by inspecting the battery 42 circuit components, wiring, and related systems for any visible damage or faults.

4. Can I still drive my vehicle with the OBDII code P1E55 present?

- It is not recommended to continue driving the vehicle with the P1E55 code present, as it can lead to further damage to the hybrid or electric vehicle's battery system.

5. How can I repair OBDII code P1E55 in a hybrid or electric vehicle?

- Repairing the P1E55 code often involves addressing the root cause of the issue, which may include repairing or replacing damaged wiring, components in the battery 42 circuit, or resetting the battery management system.

6. Is it safe to attempt DIY repairs for the OBDII code P1E55?

- Due to the complexity of hybrid and electric vehicle systems, it is recommended to seek professional assistance or take the vehicle to a certified technician for repairs related to the P1E55 code.

7. Can a weak or failing hybrid/electric vehicle battery cause the OBDII code P1E55?

- Yes, a weak or failing battery in a hybrid or electric vehicle can potentially trigger the P1E55 code due to issues with the battery 42 circuit.

8. Are there any maintenance tips to prevent the OBDII code P1E55 from recurring?

- Regular maintenance of the hybrid/electric vehicle's battery system, including checking for loose connections, ensuring proper cooling, and following manufacturer's guidelines, can help prevent the reoccurrence of the P1E55 code.

9. How much does it typically cost to repair the OBDII code P1E55 in a hybrid/electric vehicle?

- The cost of repairing the P1E55 code can vary depending on the specific issue, parts needed, and labor costs. It is advisable to consult with a professional technician for an accurate estimate.

10. Can resetting the OBDII system clear the P1E55 code temporarily?

- Resetting the OBDII system may temporarily clear the P1E55 code, but if the underlying issue is not addressed, the code is likely to reappear after some time.