AutoCodes – GMC – P0BC5 2018 GMC Sierra

P0BC5 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 5 Circuit High Voltage

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: P0BC5 2018 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 5 Circuit High Voltage.
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.

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Code Popularity 191

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
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Code P0BC5 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 hybrid battery temperature sensor is less than -69°C (-92°F).

OBDII Code P0BC5 2018 GMC Sierra - Hybrid/EV Battery Temperature Sensor 5 Circuit High Voltage - AutoCodes.com — P0BC5 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 5 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0BC5 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 P0BC5 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 P0BC5 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 P0BC5 2018 GMC Sierra code?

Need more information on how to fix the P0BC5 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0BC5 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 P0BC5 2018 GMC Sierra Code

1. What does OBDII code P0BC5 mean on a 2018 GMC Sierra?

Code P0BC5 indicates an issue with the Hybrid/EV Battery Temperature Sensor 5 circuit, where the voltage is higher than expected.

2. What are the common symptoms of code P0BC5?

Symptoms may include the check engine light turning on, reduced hybrid/EV performance, decreased fuel efficiency, or the vehicle entering limp mode.

3. What causes the P0BC5 code to appear?

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

4. Is it safe to drive with a P0BC5 code?

Driving with this code may not be safe as it can lead to limited vehicle performance and potential damage to the hybrid/EV battery system. Itâ€™s best to address the issue promptly.

5. How do you diagnose the P0BC5 code?

A technician will use an OBDII scanner to confirm the code, inspect the battery temperature sensor and its wiring, test the circuit voltage, and verify data from the hybrid/EV battery control module.

6. Can a loose connection cause the P0BC5 code?

Yes, loose or corroded connections in the sensor circuit can lead to incorrect voltage readings and trigger the code.

7. How is the P0BC5 code fixed?

Repairs may involve replacing the faulty battery temperature sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the hybrid/EV battery control module if necessary.

8. How much does it cost to fix a P0BC5 code?

Repair costs vary, but replacing a temperature sensor typically ranges from $100 to $300, including parts and labor. Additional repairs, like wiring fixes or module reprogramming, may increase costs.

9. Can a faulty hybrid/EV battery cause the P0BC5 code?

While rare, a malfunctioning hybrid/EV battery could contribute to this code if it affects the temperature sensorâ€™s operation or circuit.

10. How can I prevent the P0BC5 code from occurring again?

Regular maintenance, inspecting the hybrid/EV system for damage, and addressing issues like corrosion or wiring wear promptly can help prevent this code from recurring.