AutoCodes – Cadillac – P1B80 Cadillac

P1B80 Cadillac Code - Hybrid/Electric Vehicle Battery 52 Circuit High Voltage

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: P1B80 Cadillac indicates Hybrid/Electric Vehicle Battery 52 Circuit High Voltage.
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 940

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B80 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 P1B80 Cadillac - Hybrid/Electric Vehicle Battery 52 Circuit High Voltage - AutoCodes.com — P1B80 Cadillac Code - Hybrid/Electric Vehicle Battery 52 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B80 Cadillac?

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

How to Fix the DTC P1B80 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 P1B80 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 P1B80 Cadillac Code

What does the OBDII code P1B80 mean for a Cadillac?

P1B80 indicates an issue with the Hybrid/Electric Vehicle Battery 52 Circuit, specifically detecting a high voltage reading.

What are the common symptoms of code P1B80 in a Cadillac?

Symptoms may include a warning light on the dashboard, reduced hybrid/electric vehicle performance, and possibly the vehicle failing to start.

What causes code P1B80 to appear in a Cadillac?

The most common causes are a malfunction in the battery module, a damaged or corroded wiring harness, a faulty sensor in the battery circuit, or issues with the battery control module.

Can I drive my Cadillac with the P1B80 code present?

Driving with this code is not recommended, as it may lead to further damage to the hybrid/electric system or cause the vehicle to enter a reduced power mode.

How is the P1B80 code diagnosed?

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

What repairs are needed to fix code P1B80 in a Cadillac?

Repairs may include replacing a faulty battery module, repairing or replacing damaged wiring, recalibrating the battery control module, or updating the vehicle software.

How much does it cost to fix the P1B80 code?

Repair costs can vary widely, but diagnosing and repairing issues with hybrid/electric vehicle batteries or control modules typically ranges from $300 to $1,500 or more, depending on the severity.

Can a low 12-volt battery cause the P1B80 code?

While unlikely, a weak or failing 12-volt battery can sometimes contribute to electrical issues, so itâ€™s worth testing the 12-volt system as part of the diagnosis.

Is the P1B80 code specific to Cadillac vehicles?

While the P1B80 code is most commonly associated with Cadillac hybrid/electric vehicles, it may also appear in other GM vehicles with similar systems.

How can I prevent the P1B80 code from reoccurring?

Regular maintenance of the hybrid/electric system, inspecting wiring for damage, and keeping the battery system within the recommended operating range can help prevent this code.