AutoCodes – Generic – P1B50

P1B50 Code - Hybrid/Electric Vehicle Battery 36 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: P1B50 indicates Hybrid/Electric Vehicle Battery 36 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 1,072

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1B50 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 P1B50 - Hybrid/Electric Vehicle Battery 36 Circuit High Voltage - AutoCodes.com — P1B50 Code - Hybrid/Electric Vehicle Battery 36 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1B50?

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

How to Fix the DTC P1B50?

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 P1B50 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.

Need more information about the P1B50 code?

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Need Help with the Code?

Get the P1B50 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1B50 Buick — Hybrid/Electric Vehicle Battery 36 Circuit High Voltage
P1B50 Cadillac — Hybrid/Electric Vehicle Battery 36 Circuit High Voltage
P1B50 Chevrolet — Hybrid/Electric Vehicle Battery 36 Circuit High Voltage
P1B50 GMC — Hybrid/Electric Vehicle Battery 36 Circuit High Voltage
P1B50 Saturn — Hybrid/Electric Vehicle Battery 36 Circuit High Voltage

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 P1B50 Code

1. What are common symptoms of OBDII code P1B50 (Hybrid/Electric Vehicle Battery 36 Circuit High Voltage)?

- Common symptoms include the illumination of the check engine light, reduced hybrid battery performance, and potential difficulty starting the vehicle.

2. What can cause OBDII code P1B50 to trigger?

- This code can be triggered by issues such as a high voltage circuit malfunction in the hybrid/electric vehicle battery 36.

3. How serious is OBDII code P1B50 (Hybrid/Electric Vehicle Battery 36 Circuit High Voltage)?

- This code should be addressed promptly as it can affect the performance and safety of the hybrid/electric vehicle.

4. Can driving with OBDII code P1B50 cause further damage?

- Continuing to drive with this code present can potentially cause damage to the hybrid/electric vehicle battery system, leading to more costly repairs.

5. What are some repair tips for resolving OBDII code P1B50?

- Repair tips may include checking the high voltage circuit connections, inspecting the battery 36 circuit components, and consulting a professional for a thorough diagnosis.

6. How can I prevent OBDII code P1B50 from occurring in the future?

- Regular maintenance of the hybrid/electric vehicle battery system, including monitoring voltage levels and addressing any warning signs promptly, can help prevent this code from occurring.

7. Is it safe to drive my vehicle with OBDII code P1B50 if performance is not noticeably affected?

- It is not recommended to drive the vehicle with this code present, as it can lead to potential safety hazards and further damage to the hybrid/electric vehicle system.

8. What is the typical cost of repairing OBDII code P1B50?

- The cost of repairing this code can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It is advisable to obtain estimates from qualified technicians.

9. Can OBDII code P1B50 be reset without addressing the underlying issue?

- While the code can be cleared using an OBDII scanner, it is important to address the root cause of the issue to prevent it from reoccurring and potentially causing more severe problems.

10. How long does it take to repair OBDII code P1B50?

- The repair time for this code can vary depending on the complexity of the issue and the availability of parts. It is advisable to consult with a professional technician for an accurate estimate of repair time.