AutoCodes – Cadillac – P1E70 Cadillac

P1E70 Cadillac Code - Hybrid/Electric Vehicle Battery 69 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: P1E70 Cadillac indicates Hybrid/Electric Vehicle Battery 69 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 936

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 P1E70 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 P1E70 Cadillac - Hybrid/Electric Vehicle Battery 69 Circuit - AutoCodes.com — P1E70 Cadillac Code - Hybrid/Electric Vehicle Battery 69 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E70 Cadillac?

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

How to Fix the DTC P1E70 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 P1E70 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 P1E70 Cadillac Code

1. What does the OBDII code P1E70 mean on a Cadillac?

P1E70 indicates an issue with the Hybrid/Electric Vehicle Battery 69 Circuit, which monitors a specific part of the battery system in hybrid or electric Cadillacs.

2. What are the common symptoms of code P1E70?

Symptoms include reduced hybrid or EV performance, warning lights on the dashboard, limited battery charging or discharging, and potential loss of electric-only operation.

3. What causes the P1E70 code in a Cadillac?

Common causes include a faulty battery sensor, wiring or connector issues in the Battery 69 Circuit, a defective battery control module, or internal battery cell problems.

4. Can I drive my Cadillac with a P1E70 code?

Driving with a P1E70 code is not recommended, as it can lead to further damage to your hybrid or EV battery system and may reduce vehicle performance.

5. How is the P1E70 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the Battery 69 Circuit wiring and connectors, and test the battery control module and sensors for proper operation.

6. How do you fix a P1E70 code on a Cadillac?

Repairs may include replacing damaged wiring or connectors, replacing a faulty battery sensor, repairing the battery control module, or addressing internal battery issues.

7. Is the P1E70 code covered under warranty?

If your Cadillac is still under its hybrid or EV battery warranty, repairs related to P1E70 may be covered. Check your warranty terms for details.

8. How much does it cost to fix the P1E70 code?

Repair costs vary based on the cause, ranging from $100 for simple wiring repairs to over $1,000 for battery module or sensor replacement.

9. Can a dead 12-volt battery trigger the P1E70 code?

A weak or dead 12-volt auxiliary battery can sometimes cause communication issues that trigger codes like P1E70, though it is not the most common cause.

10. How can I prevent the P1E70 code from recurring?

Regular maintenance, monitoring the health of your hybrid or EV battery, and addressing wiring issues promptly can help prevent the P1E70 code from recurring.