P0BC4 2018 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 2018 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.
Code P0BC4 2018 GMC Sierra Description
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).
What are the Possible Causes of the DTC P0BC4 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 P0BC4 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 P0BC4 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.
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Frequently Asked Questions about P0BC4 2018 GMC Sierra Code
1. What does the OBDII code P0BC4 mean on a 2018 GMC Sierra?
The P0BC4 code indicates a low voltage issue in the Hybrid/EV Battery Temperature Sensor 5 Circuit, which monitors the temperature of the vehicle's hybrid or EV battery pack.
2. What are the common symptoms of the P0BC4 code?
Symptoms may include reduced hybrid battery performance, illuminated check engine light, overheating warnings, or limited hybrid system functionality.
3. What causes the P0BC4 code to appear?
Common causes include a faulty battery temperature sensor, damaged or corroded wiring, poor electrical connections, or an issue with the hybrid battery control module.
4. How can I diagnose the P0BC4 code on my 2018 GMC Sierra?
Begin by inspecting the battery temperature sensor, checking the wiring and connectors for damage or corrosion, and testing the sensor's voltage with a multimeter.
5. Can I drive my 2018 GMC Sierra with the P0BC4 code?
While the vehicle may still be drivable, it's not recommended as the issue could lead to battery overheating or reduced performance over time.
6. How do I fix the P0BC4 code?
Repairs may include replacing the faulty temperature sensor, repairing damaged wiring, cleaning corroded connections, or reprogramming the hybrid control module if necessary.
7. How much does it cost to repair the P0BC4 code?
The repair cost varies, but replacing a battery temperature sensor typically ranges from $100 to $300, depending on parts and labor rates.
8. Can a loose connection cause the P0BC4 code?
Yes, loose or corroded electrical connections in the temperature sensor circuit can trigger the P0BC4 code.
9. Does the P0BC4 code affect fuel efficiency in a hybrid 2018 GMC Sierra?
Yes, the code may cause reduced fuel efficiency due to limited hybrid functionality or increased reliance on the gasoline engine.
10. Is the P0BC4 code covered under warranty for a 2018 GMC Sierra?
It depends on your vehicle’s warranty terms. Check if the hybrid or emissions system is still covered under the manufacturer’s warranty.
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