AutoCodes – Saturn – P1E85 Saturn

P1E85 Saturn Code - Hybrid/Electric Vehicle Battery 90 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: P1E85 Saturn indicates Hybrid/Electric Vehicle Battery 90 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 851

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E85 Saturn 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 P1E85 Saturn - Hybrid/Electric Vehicle Battery 90 Circuit - AutoCodes.com — P1E85 Saturn Code - Hybrid/Electric Vehicle Battery 90 Circuit

What does this mean?

What are the Possible Causes of the DTC P1E85 Saturn?

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

How to Fix the DTC P1E85 Saturn?

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 P1E85 Saturn 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 P1E85 Saturn Code

1. What does the OBDII code P1E85 mean on a Saturn?

P1E85 indicates an issue with the Hybrid/Electric Vehicle Battery 90 Circuit, typically involving the battery control module or its wiring.

2. What are common symptoms of the P1E85 code?

Symptoms may include illuminated warning lights (like the check engine light or hybrid system warning), reduced hybrid system performance, or the vehicle operating in a failsafe mode.

3. What causes the P1E85 code on a Saturn hybrid or electric vehicle?

Common causes include faulty wiring or connectors in the battery circuit, a malfunctioning battery control module, or an internal issue with the hybrid battery pack.

4. How is the P1E85 code diagnosed?

A technician will use a scan tool to read the code, inspect the battery circuit wiring and connectors, and test the battery control module and related components for proper function.

5. Can I drive my Saturn with the P1E85 code?

Driving with this code is not recommended, as it may affect the hybrid systemâ€™s performance and could lead to further damage if left unaddressed.

6. What tools are needed to troubleshoot the P1E85 code?

Tools include an OBDII scan tool, a digital multimeter for checking wiring and voltage, and potentially specialized equipment for hybrid battery diagnostics.

7. How can the P1E85 code be fixed?

Repairs may involve repairing or replacing damaged wiring, cleaning or securing electrical connections, replacing a faulty battery control module, or addressing hybrid battery issues.

8. Does the P1E85 code always mean the hybrid battery is bad?

No, while it can indicate a problem with the hybrid battery, it is often related to wiring or the battery control module rather than the battery itself.

9. How much does it cost to fix the P1E85 code on a Saturn?

Costs vary depending on the issue, ranging from $100â€“$300 for wiring repairs to over $1,000 if the battery control module or hybrid battery needs replacement.

10. Can a weak 12-volt battery trigger the P1E85 code?

In some cases, a weak or failing 12-volt battery can contribute to hybrid system errors, so itâ€™s worth checking and replacing it if needed.