AutoCodes – Cadillac – P1B9C Cadillac

P1B9C Cadillac Code - Hybrid/Electric Vehicle Battery 62 Circuit Performance

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: P1B9C Cadillac indicates Hybrid/Electric Vehicle Battery 62 Circuit Performance.
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 839

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 P1B9C 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 P1B9C Cadillac - Hybrid/Electric Vehicle Battery 62 Circuit Performance - AutoCodes.com — P1B9C Cadillac Code - Hybrid/Electric Vehicle Battery 62 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B9C Cadillac?

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

How to Fix the DTC P1B9C 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 P1B9C 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 P1B9C Cadillac Code

1. What are common symptoms of OBDII code P1B9C Cadillac related to Hybrid/Electric Vehicle Battery 62 Circuit Performance?

- Common symptoms include reduced hybrid/electric vehicle performance, decreased fuel efficiency, and potential issues with battery charging.

2. What are the possible causes of OBDII code P1B9C Cadillac indicating Hybrid/Electric Vehicle Battery 62 Circuit Performance issue?

- Possible causes include faulty battery cells, damaged wiring or connectors in the battery circuit, software glitches, or issues with the battery management system.

3. How can I diagnose the OBDII code P1B9C Cadillac Hybrid/Electric Vehicle Battery 62 Circuit Performance problem?

- Diagnosis typically involves using a professional OBDII scanner to read the specific code, checking the battery connections, inspecting the battery cells visually, and performing electrical tests on the circuit components.

4. Can I continue driving my Cadillac with the OBDII code P1B9C indicating Hybrid/Electric Vehicle Battery 62 Circuit Performance issue?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/electric system and potentially unsafe driving conditions.

5. What are some repair tips for addressing the OBDII code P1B9C Cadillac Hybrid/Electric Vehicle Battery 62 Circuit Performance problem?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing faulty battery cells, updating software if necessary, and ensuring proper functioning of the battery management system.

6. Can resetting the OBDII code P1B9C Cadillac Hybrid/Electric Vehicle Battery 62 Circuit Performance issue temporarily resolve the problem?

- Resetting the code may temporarily clear the warning light, but it is important to address the root cause of the issue to prevent further problems with the hybrid/electric system.

7. Is it safe to attempt DIY repairs for the OBDII code P1B9C indicating Hybrid/Electric Vehicle Battery 62 Circuit Performance issue?

- DIY repairs can be risky due to the complexity of hybrid/electric systems. It is recommended to seek professional help or guidance from experienced technicians to avoid causing further damage.

8. How much does it typically cost to repair the OBDII code P1B9C Cadillac Hybrid/Electric Vehicle Battery 62 Circuit Performance issue?

- The cost of repairs can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to consult with a trusted mechanic for an accurate estimate.

9. Will ignoring the OBDII code P1B9C Cadillac Hybrid/Electric Vehicle Battery 62 Circuit Performance problem cause more damage over time?

- Ignoring the issue can lead to further deterioration of the hybrid/electric system, potentially resulting in more costly repairs and jeopardizing the vehicle's overall performance and safety.

10. How often should I have the hybrid/electric system of my Cadillac inspected to prevent OBDII code P1B9C occurrences?

- Regular maintenance checks, including inspections of the hybrid/electric system, should be performed as per the manufacturer's recommended schedule to detect and address potential issues early on and avoid triggering OBDII codes like P1B9C.