AutoCodes – GMC – P0BC4 2017 GMC Sierra

P0BC4 2017 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 5 Circuit Low 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: P0BC4 2017 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 5 Circuit Low 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 182

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 P0BC4 2017 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 greater than 160°C (320°F).

OBDII Code P0BC4 2017 GMC Sierra - Hybrid/EV Battery Temperature Sensor 5 Circuit Low Voltage - AutoCodes.com — P0BC4 2017 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 5 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0BC4 2017 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 P0BC4 2017 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 P0BC4 2017 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 P0BC4 2017 GMC Sierra code?

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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 P0BC4 2017 GMC Sierra Code

What does OBDII code P0BC4 mean for a 2017 GMC Sierra?

P0BC4 indicates a "Hybrid/EV Battery Temperature Sensor 5 Circuit Low Voltage," meaning the vehicle's monitoring system has detected a low voltage signal from temperature sensor 5 in the hybrid or EV battery pack.

What are the common symptoms of P0BC4 in a 2017 GMC Sierra?

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

What causes the P0BC4 code to appear?

Common causes include a faulty battery temperature sensor 5, damaged or corroded wiring or connectors in the sensor circuit, or issues with the hybrid control module.

Can I drive my 2017 GMC Sierra with the P0BC4 code?

Driving with this code is not recommended, as it may lead to reduced hybrid system efficiency, overheating of the battery pack, or further damage to the hybrid system.

How is the P0BC4 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the battery temperature sensor 5 and related wiring/connectors for damage, and test the circuit for proper voltage and continuity.

What are possible fixes for the P0BC4 code?

Repairs may include replacing the faulty battery temperature sensor 5, repairing or replacing damaged wiring or connectors, or updating/reprogramming the hybrid control module if needed.

How much does it cost to fix the P0BC4 code on a 2017 GMC Sierra?

Repair costs can vary widely depending on the cause, but sensor replacement typically costs $150-$300, while wiring repairs may range from $50-$200.

Can a low hybrid battery charge cause the P0BC4 code?

No, this code specifically relates to a low voltage signal from the battery temperature sensor circuit, not the state of charge of the hybrid battery.

How can I prevent the P0BC4 code from occurring?

Regular maintenance, including inspecting the hybrid battery system and ensuring wiring/connectors are clean and undamaged, can help prevent this code from appearing.

Does the P0BC4 code require reprogramming the hybrid control module?

In some cases, reprogramming or updating the hybrid control module may be necessary if the issue is related to software errors, but this is less common than hardware-related fixes.