AutoCodes – GMC – P0BC3 2018 GMC Sierra

P0BC3 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 5 Performance

Quick Answer

Hybrid/EV Battery Temperature Sensors are used to monitor the battery temperature. Common causes include Faulty Hybrid/EV Battery Assembly, Hybrid/EV Battery Assembly harness is open or shorted, Hybrid/EV Battery Assembly circuit poor electrical connection. 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: P0BC3 2018 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 5 Performance.
Common causes: Common causes include Faulty Hybrid/EV Battery Assembly, Hybrid/EV Battery Assembly harness is open or shorted, Hybrid/EV Battery Assembly circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 183

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 22, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0BC3 2018 GMC Sierra Description

Hybrid/EV Battery Temperature Sensors are used to monitor the battery temperature. The non-serviceable battery temperature sensors are located within the battery sections. Two temperature sensors are located in each battery section. The temperature sensor is a variable resistor that measures the temperature of the battery cell group. The hybrid/EV interface control module supplies 5 V to the signal circuit and is a ground for the low reference circuit. The battery temperature sensor resistance changes with battery temperature. As the temperature decreases, the sensor resistance increases. As the temperature increases, the sensor resistance decreases.
Each Hybrid/EV Battery Interface Control Module communicates the temperature sensor values to the Hybrid/EV Powertrain Control Module via serial data.
The Hybrid/EV Powertrain Control Module uses the battery temperature sensors to determine the Hybrid/EV Battery Module temperature in order to control the battery cooling system operation.
The Diagnostic Trouble Code (DTC) will be set when the difference between a single battery temperature sensor and an average of the other battery temperature sensors is greater than 25°C (45°F).

OBDII Code P0BC3 2018 GMC Sierra - Hybrid/EV Battery Temperature Sensor 5 Performance - AutoCodes.com — P0BC3 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 5 Performance

What does this mean?

What are the Possible Causes of the DTC P0BC3 2018 GMC Sierra?

Faulty Hybrid/EV Battery Assembly
Hybrid/EV Battery Assembly harness is open or shorted
Hybrid/EV Battery Assembly circuit poor electrical connection
Faulty Hybrid/EV Battery Interface Control Module

How to Fix the DTC P0BC3 2018 GMC Sierra?

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 P0BC3 2018 GMC Sierra 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 P0BC3 2018 GMC Sierra code?

Need more information on how to fix the P0BC3 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0BC3 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P0BC3 2018 GMC Sierra Code

1. What does the OBDII code P0BC3 mean on a 2018 GMC Sierra?

The code P0BC3 indicates a performance issue with Hybrid/EV Battery Temperature Sensor 5, meaning the sensor is not functioning within the expected range.

2. What are the common symptoms of code P0BC3?

Symptoms may include a check engine light, reduced fuel efficiency, limited hybrid/EV functionality, or issues with battery performance.

3. What causes the P0BC3 code to appear?

Common causes include a faulty battery temperature sensor, damaged wiring or connectors, or a malfunction in the hybrid/EV battery control module.

4. Can I drive my 2018 GMC Sierra with code P0BC3?

While the vehicle may still be drivable, continuing to drive with this code could lead to further damage to the hybrid/EV battery system. Itâ€™s best to address the issue promptly.

5. How do I fix the P0BC3 code?

Repairs may include replacing the faulty temperature sensor, repairing damaged wiring, or recalibrating the hybrid/EV battery control module.

6. How is the P0BC3 code diagnosed?

A technician will typically use a scan tool to confirm the code, inspect the sensor and wiring for damage, and test the sensor's performance against manufacturer specifications.

7. Does the P0BC3 code always mean the sensor is bad?

Not necessarily. The issue could also stem from wiring problems, a loose connection, or a malfunction in the battery control module.

8. What tools are needed to troubleshoot the P0BC3 code?

Diagnosing this code may require an OBDII scanner, a multimeter for testing electrical connections, and access to the vehicleâ€™s service manual.

9. How much does it cost to repair the P0BC3 code?

Repair costs can vary, but replacing a battery temperature sensor typically costs between $100 and $300, depending on parts and labor.

10. Can a software update fix the P0BC3 code?

In some cases, a software update for the hybrid/EV battery control module might resolve the issue, but this depends on the specific cause of the code.