AutoCodesGMC – P0C34 2018 GMC Sierra

P0C34 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 6 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
P0C34 2018 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 6 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.
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Code Popularity 144
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 22, 2024
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Code P0C34 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 P0C34 2018 GMC Sierra - Hybrid/EV Battery Temperature Sensor 6 Performance - AutoCodes.com
P0C34 2018 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 6 Performance

What are the Possible Causes of the DTC P0C34 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 P0C34 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 P0C34 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 P0C34 2018 GMC Sierra code?

Need more information on how to fix the P0C34 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 P0C34 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P0C34 in a 2018 GMC Sierra Hybrid/EV?

- Common symptoms include reduced fuel efficiency, hybrid system malfunctions, and a check engine light.

2. What could be the possible causes of OBDII code P0C34 in a 2018 GMC Sierra Hybrid/EV?

- The code P0C34 usually indicates a malfunction in Hybrid/EV Battery Temperature Sensor 6, which could be caused by sensor failure, wiring issues, or a problem with the battery itself.

3. How can I diagnose the issue related to Hybrid/EV Battery Temperature Sensor 6 for OBDII code P0C34 in my 2018 GMC Sierra?

- Diagnosing the issue may involve using a scan tool to read the specific code, checking the sensor's wiring for any damage, and testing the sensor's resistance to determine if it is functioning correctly.

4. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P0C34 related to the Hybrid/EV Battery Temperature Sensor 6 performance issue?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially affect the vehicle's performance.

5. How can I repair OBDII code P0C34 in my 2018 GMC Sierra Hybrid/EV related to the Hybrid/EV Battery Temperature Sensor 6 performance?

- Repairing the issue may involve replacing the faulty sensor, repairing any damaged wiring, or addressing any underlying battery problems identified during diagnosis.

6. Can I reset the OBDII code P0C34 in my 2018 GMC Sierra Hybrid/EV without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is crucial to address the underlying problem causing the code to prevent further issues and ensure the vehicle's proper functioning.

7. Are there any maintenance tips to prevent OBDII code P0C34 related to the Hybrid/EV Battery Temperature Sensor 6 performance issue in my 2018 GMC Sierra?

- Regularly inspecting the hybrid system components, including sensors and wiring, and following the manufacturer's recommended maintenance schedule can help prevent such issues.

8. How much does it typically cost to repair OBDII code P0C34 related to the Hybrid/EV Battery Temperature Sensor 6 performance in a 2018 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts and labor expenses ranging from a few hundred to over a thousand dollars.

9. Can a DIY enthusiast with automotive knowledge fix OBDII code P0C34 in a 2018 GMC Sierra Hybrid/EV on their own?

- While some enthusiasts may have the skills to diagnose and replace the sensor or address wiring issues, it is recommended to consult a professional mechanic or specialized hybrid technician for complex hybrid system repairs.

10. Will OBDII code P0C34 in a 2018 GMC Sierra Hybrid/EV cause any long-term damage if left unrepaired?

- Ignoring the issue related to Hybrid/EV Battery Temperature Sensor 6 performance can lead to reduced hybrid system efficiency, potential battery damage, and other long-term issues, so it is best to address it promptly.

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