AutoCodes – Cadillac – P1B17 Cadillac

P1B17 Cadillac Code - Hybrid/Electric Vehicle Battery 27 Circuit Low 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: P1B17 Cadillac indicates Hybrid/Electric Vehicle Battery 27 Circuit Low 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 878

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 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B17 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 P1B17 Cadillac - Hybrid/Electric Vehicle Battery 27 Circuit Low Voltage - AutoCodes.com — P1B17 Cadillac Code - Hybrid/Electric Vehicle Battery 27 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1B17 Cadillac?

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

How to Fix the DTC P1B17 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 P1B17 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 P1B17 Cadillac Code

1. What are the common symptoms of OBDII code P1B17 in a Cadillac Hybrid/Electric Vehicle?

- Common symptoms include reduced battery performance, poor fuel efficiency, and potential warning lights on the dashboard.

2. What can cause the Hybrid/Electric Vehicle Battery 27 Circuit Low Voltage code in a Cadillac?

- Possible causes may include a faulty battery pack, issues with the battery management system, or problems with the battery cooling system.

3. How serious is the P1B17 code in a Cadillac Hybrid/Electric Vehicle?

- This code can impact the performance and efficiency of the vehicle, so it is important to address it promptly to prevent further damage to the battery system.

4. Can a DIY enthusiast repair the Hybrid/Electric Vehicle Battery 27 Circuit Low Voltage issue?

- Repairing this issue may require specialized tools and knowledge of hybrid/electric vehicle systems, so it is recommended to seek professional help for accurate diagnosis and repair.

5. How can I diagnose the P1B17 code in my Cadillac Hybrid/Electric Vehicle?

- A thorough diagnostic scan with an OBDII scanner and inspection of the battery system by a qualified technician can help pinpoint the exact cause of the low voltage issue.

6. What are some tips for maintaining the hybrid/electric battery system to prevent the P1B17 code from recurring?

- Regularly scheduled maintenance, such as battery inspections and software updates, can help prevent issues like low voltage in hybrid/electric vehicles.

7. Is it safe to drive my Cadillac with the Hybrid/Electric Vehicle Battery 27 Circuit Low Voltage code present?

- It is not recommended to drive the vehicle with this code active, as it can lead to further damage to the battery system and affect the overall performance of the vehicle.

8. How much does it typically cost to repair the P1B17 code in a Cadillac Hybrid/Electric Vehicle?

- Repair costs can vary depending on the cause of the issue, but it is advisable to budget for potentially expensive repairs due to the complexity of hybrid/electric vehicle systems.

9. Can resetting the OBDII code P1B17 clear the issue temporarily?

- Resetting the code may temporarily clear the warning light, but it is crucial to address the underlying cause to prevent the issue from recurring and causing further damage.

10. Are there any recalls or technical service bulletins related to the Hybrid/Electric Vehicle Battery 27 Circuit Low Voltage code in Cadillac vehicles?

- It is recommended to check with a Cadillac dealership or the manufacturer's website for any recalls or technical service bulletins related to this specific OBDII code to stay informed about potential updates or fixes.