AutoCodes – Cadillac – P1E55 Cadillac

P1E55 Cadillac 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 Cadillac 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 765

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 Cadillac 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 Cadillac - Hybrid/Electric Vehicle Battery 42 Circuit - AutoCodes.com — P1E55 Cadillac Code - Hybrid/Electric Vehicle Battery 42 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E55 Cadillac?

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

How to Fix the DTC P1E55 Cadillac?

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 Cadillac 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 P1E55 Cadillac Code

1. What are common symptoms of OBDII code P1E55 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and illuminated warning lights on the dashboard.

2. What does OBDII code P1E55 indicate in a Cadillac Hybrid/Electric Vehicle?

- OBDII code P1E55 specifically refers to a fault in the Hybrid/Electric Vehicle Battery 42 Circuit.

3. What are some possible causes of OBDII code P1E55 in a Cadillac Hybrid/Electric Vehicle?

- Potential causes include a faulty battery pack, damaged wiring in the 42 circuit, poor connections, or issues with the battery management system.

4. How can I diagnose the source of OBDII code P1E55 in my Cadillac Hybrid/Electric Vehicle?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the battery pack and circuit wiring, and testing the connections for proper voltage and continuity.

5. Can I continue driving my Cadillac with OBDII code P1E55 present?

- It is not recommended to continue driving with OBDII code P1E55 as it can lead to further damage to the hybrid system and impact vehicle performance.

6. Is it safe to attempt repairs for OBDII code P1E55 in a Cadillac Hybrid/Electric Vehicle myself?

- Repairing issues related to the Hybrid/Electric Vehicle Battery 42 Circuit should be handled by qualified technicians with experience working on hybrid vehicles due to the high voltage present in the system.

7. How much does it typically cost to repair OBDII code P1E55 in a Cadillac Hybrid/Electric Vehicle?

- Repair costs can vary depending on the exact cause of the fault, but they may range from a few hundred to a few thousand dollars, especially if battery pack replacement is necessary.

8. Are there any preventive maintenance tips to avoid OBDII code P1E55 in a Cadillac Hybrid/Electric Vehicle?

- Regularly scheduled maintenance, such as checking the battery system and wiring for signs of wear, can help prevent issues that may trigger OBDII code P1E55.

9. Can a Cadillac dealership service center help with diagnosing and repairing OBDII code P1E55?

- Yes, Cadillac dealership service centers are equipped with the necessary tools and expertise to diagnose and repair issues related to OBDII code P1E55 in Hybrid/Electric Vehicles.

10. How long does it typically take to repair OBDII code P1E55 in a Cadillac Hybrid/Electric Vehicle?

- The repair time can vary based on the complexity of the issue, but it may take anywhere from a few hours to a couple of days to diagnose and fix the problem with OBDII code P1E55.