AutoCodes – Chevrolet – P0C85 2017 Chevrolet Silverado

P0C85 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado 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.

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Code Popularity 228

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P0C85 2017 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 intermittent or has changed by 10°C (18°F) or greater for 4 out of 5 seconds.

OBDII Code P0C85 2017 Chevrolet Silverado - Hybrid/EV Battery Temperature Sensor 8 Circuit Erratic - AutoCodes.com — P0C85 2017 Chevrolet Silverado Code - Hybrid/EV Battery Temperature Sensor 8 Circuit Erratic

What does this mean?

What are the Possible Causes of the DTC P0C85 2017 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 P0C85 2017 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 P0C85 2017 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 P0C85 2017 Chevrolet Silverado code?

Need more information on how to fix the P0C85 2017 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 P0C85 2017 Chevrolet Silverado Code

1. What does the OBDII code P0C85 mean on a 2017 Chevrolet Silverado?

The P0C85 code indicates an issue with the Hybrid/EV Battery Temperature Sensor 8 Circuit, specifically that the sensor is detecting erratic or inconsistent signals.

2. What are the symptoms of a P0C85 code in a 2017 Chevrolet Silverado?

Symptoms may include the hybrid system warning light, reduced fuel efficiency, limited hybrid system functionality, or the vehicle entering a fail-safe mode.

3. What causes the P0C85 code to appear in a Chevrolet Silverado?

Common causes include a faulty battery temperature sensor, damaged wiring or connectors, a malfunctioning hybrid battery control module, or issues with the hybrid battery itself.

4. Can I drive my 2017 Chevrolet Silverado with a P0C85 code?

While the vehicle may still operate, driving with this code is not recommended because it could lead to further damage to the hybrid system or affect fuel efficiency and performance.

5. How do you diagnose a P0C85 code on a 2017 Chevrolet Silverado?

Diagnosis involves using a scan tool to check for additional codes, visually inspecting wiring and connectors, testing the temperature sensor for proper resistance, and checking the hybrid battery control module.

6. How do you fix a P0C85 code in a Chevrolet Silverado?

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

7. How much does it cost to repair a P0C85 code on a 2017 Chevrolet Silverado?

Repair costs vary but could range from $100 for wiring repairs to over $500 if the temperature sensor or control module needs replacement.

8. Can a weak hybrid battery cause the P0C85 code in a Silverado?

Yes, a weak or malfunctioning hybrid battery can cause erratic readings from the temperature sensor, triggering the P0C85 code.

9. Do I need special tools to fix a P0C85 code on a 2017 Chevrolet Silverado?

Yes, you’ll need an advanced scan tool capable of reading hybrid system data and possibly additional tools to safely work on the high-voltage hybrid battery system.

10. Does the P0C85 code always require sensor replacement?

No, the issue could also stem from wiring problems, connector issues, or a software-related fault, so proper diagnosis is essential before replacing the sensor.