AutoCodes – Chevrolet – P0BC4 2018 Chevrolet Silverado

P0BC4 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 381

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Hybrid/EV Battery Temperature Sensor 5 Circuit Low Voltage - AutoCodes.com — P0BC4 2018 Chevrolet Silverado Code - Hybrid/EV Battery Temperature Sensor 5 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0BC4 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P0BC4 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2018 Chevrolet Silverado Code

1. What does the OBDII code P0BC4 mean on a 2018 Chevrolet Silverado?

The P0BC4 code indicates a "Hybrid/EV Battery Temperature Sensor 5 Circuit Low Voltage," meaning the sensor is detecting a voltage lower than the expected range.

2. What are the common symptoms of the P0BC4 code?

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

3. What causes the P0BC4 code to appear?

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

4. How does the Hybrid/EV Battery Temperature Sensor work?

The sensor monitors the temperature of the hybrid battery to ensure proper operation and prevent overheating. It sends voltage signals to the control module based on the temperature.

5. Can I drive with the P0BC4 code active?

It is not recommended to drive for extended periods, as this code can indicate potential issues with the battery system that could lead to overheating or reduced performance.

6. How do I diagnose the P0BC4 code?

Start by inspecting the wiring and connectors for damage or corrosion, testing the temperature sensor for proper resistance, and using a scan tool to verify the voltage readings from the sensor.

7. What repairs can fix the P0BC4 code?

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

8. Is the P0BC4 code specific to the 2018 Chevrolet Silverado?

No, the P0BC4 code is a generic OBDII code, but its specific meaning and symptoms are related to hybrid/EV battery systems, which can vary between vehicles.

9. How much does it cost to repair the P0BC4 code on a 2018 Silverado?

The cost depends on the issue, ranging from $50-$150 for a new temperature sensor to $200-$500 for more extensive wiring repairs or module reprogramming.

10. Can a low hybrid battery charge trigger the P0BC4 code?

While low battery charge alone may not trigger this code, issues with the temperature sensor or its circuit could indirectly affect battery performance and charging efficiency.