P0C85 2014 GMC Sierra Code - Hybrid/EV Battery Temperature Sensor 8 Circuit Erratic
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
- P0C85 2014 GMC Sierra indicates Hybrid/EV Battery Temperature Sensor 8 Circuit Erratic.
- 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 P0C85 2014 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 intermittent or has changed by 10°C (18°F) or greater for 4 out of 5 seconds.
What are the Possible Causes of the DTC P0C85 2014 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 P0C85 2014 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 P0C85 2014 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 P0C85 2014 GMC Sierra Code
1. What does the OBDII code P0C85 mean on a 2014 GMC Sierra?
The P0C85 code indicates an issue with the Hybrid/EV Battery Temperature Sensor 8 Circuit, where the sensor is sending erratic or inconsistent signals to the vehicle's control module.
2. What are the common symptoms of the P0C85 code in a 2014 GMC Sierra?
Symptoms may include a check engine light, reduced fuel efficiency, limited hybrid system performance, or the vehicle entering a reduced power mode.
3. What causes the P0C85 code to appear in a 2014 GMC Sierra?
Common causes include a faulty battery temperature sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning hybrid battery control module.
4. Can I continue driving my 2014 GMC Sierra with the P0C85 code?
While the vehicle may still be drivable, ignoring this code can lead to reduced performance and potential damage to the hybrid battery system, so it’s best to address it promptly.
5. How do I diagnose the P0C85 code on my 2014 GMC Sierra?
Diagnosing this code involves checking the battery temperature sensor, inspecting the wiring and connectors in the circuit, and using a scan tool to monitor sensor data for erratic readings.
6. How can I fix the P0C85 code on my 2014 GMC Sierra?
Repairs may include replacing the faulty battery temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the hybrid battery control module if necessary.
7. Is the P0C85 code specific to Sensor 8 in the hybrid battery system?
Yes, the code specifically refers to the eighth temperature sensor in the hybrid battery system, which monitors the temperature of a specific section of the battery.
8. What tools are needed to troubleshoot the P0C85 code on a 2014 GMC Sierra?
You’ll need an OBDII scan tool, a multimeter to check wiring continuity, and possibly a service manual for the vehicle to locate the sensor and circuit components.
9. How much does it typically cost to fix the P0C85 code on a 2014 GMC Sierra?
Repair costs can vary depending on the exact issue but may range from $100 to $500, including parts and labor, with sensor replacement being on the lower end and module replacement on the higher end.
10. Can a software update fix the P0C85 code on a 2014 GMC Sierra?
In some cases, a software update for the hybrid battery control module may resolve the issue if it’s caused by incorrect calibration or a known software bug.
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