AutoCodes – Cadillac – P1B16 Cadillac

P1B16 Cadillac Code - Hybrid/Electric Vehicle Battery 27 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: P1B16 Cadillac indicates Hybrid/Electric Vehicle Battery 27 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 879

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 P1B16 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 P1B16 Cadillac - Hybrid/Electric Vehicle Battery 27 Circuit Performance - AutoCodes.com — P1B16 Cadillac Code - Hybrid/Electric Vehicle Battery 27 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1B16 Cadillac?

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

How to Fix the DTC P1B16 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 P1B16 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 P1B16 Cadillac Code

1. What are common symptoms of OBDII code P1B16 in a Cadillac hybrid/electric vehicle?

Symptoms may include reduced hybrid system performance, decreased fuel efficiency, and illuminated warning lights on the dashboard.

2. What can cause the OBDII code P1B16 in a Cadillac hybrid/electric vehicle?

Possible causes include issues with the high voltage battery pack, faulty battery management system components, or wiring/connectivity problems in the hybrid battery circuit.

3. How can I diagnose the OBDII code P1B16 in my Cadillac hybrid/electric vehicle?

A thorough diagnostic scan tool capable of reading hybrid system codes is needed to pinpoint the exact source of the issue. It is recommended to seek professional assistance for accurate diagnosis.

4. Can I continue driving my Cadillac with the OBDII code P1B16 present?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid/electric system. Seek professional help to address the issue promptly.

5. What repairs are typically needed to fix the OBDII code P1B16 in a Cadillac hybrid/electric vehicle?

Repairs may involve replacing faulty battery components, repairing wiring/connectivity issues, or recalibrating the battery management system. The exact repair needed will depend on the specific diagnosis.

6. Are there any safety precautions to consider when working on the hybrid/electric system related to code P1B16?

Extreme caution should be exercised when working on high voltage components. It is best to leave such repairs to trained professionals with experience in handling hybrid/electric vehicle systems.

7. How can I prevent the OBDII code P1B16 from recurring in my Cadillac hybrid/electric vehicle?

Regular maintenance of the hybrid/electric system, including monitoring battery health and addressing any warning lights promptly, can help prevent the recurrence of this code.

8. Can a DIY enthusiast attempt to fix the OBDII code P1B16 in a Cadillac hybrid/electric vehicle?

Due to the complexity and safety considerations involved in working on hybrid/electric systems, it is recommended to consult a qualified technician for repairs related to this code.

9. Is the OBDII code P1B16 specific to Cadillac vehicles, or can it occur in other brands as well?

While the code itself may be specific to Cadillac vehicles, similar issues with hybrid/electric vehicle battery circuits can occur in other brands, each with their unique diagnostic codes.

10. What is the typical cost of repairing the OBDII code P1B16 in a Cadillac hybrid/electric vehicle?

Repair costs can vary based on the specific diagnosis and needed repairs. It is advisable to consult with a dealership or reputable repair shop for an accurate estimate based on your vehicle's condition.