P1B87 Buick Code - Hybrid/Electric Vehicle Battery 55 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
- P1B87 Buick indicates Hybrid/Electric Vehicle Battery 55 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.
Code P1B87 Buick Description
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.
What are the Possible Causes of the DTC P1B87 Buick?
- Faulty Hybrid/Electric Vehicle Battery Pack
- Faulty Hybrid/Electric Vehicle Battery Interface Control Module
How to Fix the DTC P1B87 Buick?
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 P1B87 Buick 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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Frequently Asked Questions about P1B87 Buick Code
What does the OBDII code P1B87 mean for a Buick?
The code P1B87 indicates a performance issue in the Hybrid/Electric Vehicle Battery 55 Circuit, often related to the battery management system.
What are common symptoms of the P1B87 code in a Buick?
Symptoms may include reduced fuel efficiency, loss of hybrid functionality, illuminated warning lights, or difficulty maintaining battery charge.
What causes the P1B87 code to appear in a Buick?
Common causes include faulty battery cells, damaged wiring or connectors in the circuit, issues with the battery management system, or software glitches.
Can the P1B87 code affect vehicle performance?
Yes, it can lead to reduced hybrid system efficiency and potentially impact the vehicle's overall performance.
How can I diagnose the P1B87 code in my Buick?
Diagnosis typically involves scanning for codes, visually inspecting the battery wiring and connectors, and testing individual battery modules for irregularities.
Can I drive my Buick with the P1B87 code active?
While the vehicle may still be drivable, it's not recommended as prolonged use can further damage the hybrid system and reduce efficiency.
How is the P1B87 code fixed in a Buick?
Repairs may include replacing damaged wiring, repairing or replacing faulty battery cells, reprogramming the battery management system, or updating software.
Does the P1B87 code require a battery replacement?
Not always. It depends on whether individual battery cells or modules are damaged, or if the issue lies in the wiring or management system.
How much does it cost to repair the P1B87 code in a Buick?
Costs vary widely based on the cause, ranging from minor wiring repairs to more expensive battery module replacements or system reprogramming.
Can a software update fix the P1B87 code in a Buick?
In some cases, a software update may resolve the issue if the problem is related to the battery management system's programming.
Discuss the causes and fixes for P1B87 Buick OBDII Code
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