AutoCodes – Generic – P1E70

P1E70 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 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 1,556

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

What does this mean?

What are the Possible Causes of the DTC P1E70?

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

How to Fix the DTC P1E70?

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 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

P1E70 Buick — Hybrid/Electric Vehicle Battery 69 Circuit
P1E70 Cadillac — Hybrid/Electric Vehicle Battery 69 Circuit
P1E70 Chevrolet — Hybrid/Electric Vehicle Battery 69 Circuit
P1E70 GMC — Hybrid/Electric Vehicle Battery 69 Circuit
P1E70 Saturn — Hybrid/Electric Vehicle Battery 69 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 P1E70 Code

1. What does the OBDII code P1E70 mean?

P1E70 indicates a fault in the Hybrid/Electric Vehicle Battery 69 Circuit, which typically relates to voltage or communication issues in the high-voltage battery system.

2. What are the common symptoms of a P1E70 code?

Symptoms may include a check engine light, reduced power mode, decreased fuel efficiency, or limited hybrid/electric system functionality.

3. What causes the P1E70 code to appear?

The main causes are wiring issues, a faulty battery module or sensor, corrosion at electrical connectors, or a malfunction in the battery management system (BMS).

4. Can the P1E70 code damage the vehicle if left unresolved?

Yes, ignoring the issue can lead to further damage to the battery system and reduced performance, potentially requiring expensive repairs.

5. How is the P1E70 code diagnosed?

Technicians use a scan tool to read the code, inspect wiring and connectors, test the battery module, and check for additional related codes.

6. What repairs are commonly required for the P1E70 code?

Repairs may involve replacing damaged wiring, cleaning or securing connectors, replacing a faulty battery module, or reprogramming the battery management system.

7. Can I clear the P1E70 code without fixing the issue?

Clearing the code without addressing the underlying problem will likely cause it to return and may worsen the issue over time.

8. Is the P1E70 code specific to a certain vehicle make or model?

While it commonly appears in hybrid and electric vehicles, its exact meaning and repair steps may vary by manufacturer, so refer to the service manual for your specific vehicle.

9. Can a weak 12-volt battery cause the P1E70 code?

A weak 12-volt battery can sometimes contribute to hybrid/electric system errors, but the root cause of P1E70 is usually within the high-voltage battery system.

10. How much does it cost to fix a P1E70 code?

Repair costs can vary widely depending on the issue, but repairs might range from $100 for minor wiring fixes to over $1,000 for battery module replacement.