P0C85 Cadillac 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 Cadillac 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 Cadillac 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 Cadillac?
- 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 Cadillac?
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 Cadillac 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 Cadillac Code
What does the OBDII code P0C85 mean on a Cadillac?
The P0C85 code indicates an issue with the Hybrid/EV Battery Temperature Sensor 8 Circuit, specifically that it is behaving erratically or providing inconsistent data.
What are the common symptoms of the P0C85 code?
Symptoms include an illuminated check engine light, reduced hybrid/EV performance, overheating batteries, or the vehicle transitioning to reduced power mode.
What causes the P0C85 code to appear?
Common causes include a faulty battery temperature sensor, damaged wiring or connectors, corrosion in the sensor circuit, or a malfunctioning hybrid battery control module.
Can you drive a Cadillac with the P0C85 code?
It’s not recommended, as the erratic temperature readings could lead to improper battery cooling, reduced efficiency, or potential overheating, which may cause further damage.
How is the P0C85 code diagnosed?
A technician uses a scan tool to verify the code, inspects the battery temperature sensor and wiring for damage, checks for proper voltage, and tests the sensor's functionality.
How do you fix the P0C85 code on a Cadillac?
Repairs may involve replacing the faulty temperature sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming/updating the hybrid battery control module.
How much does it cost to fix the P0C85 code?
The repair cost varies but typically ranges from $150 to $500, depending on whether the issue is with the sensor, wiring, or control module.
Can a dead 12V battery cause the P0C85 code?
While unlikely, a weak or dead 12V battery can sometimes cause communication issues with the hybrid battery system, potentially triggering related codes.
Is the P0C85 code specific to Cadillac vehicles?
No, the P0C85 code can appear on other hybrid or EV vehicles using the OBDII system, but the diagnosis and repair process may vary by manufacturer.
Does the P0C85 code require reprogramming the control module?
Reprogramming the control module is only necessary if the code is caused by outdated software or if the module itself is faulty and replaced.
Discuss the causes and fixes for P0C85 Cadillac OBDII Code
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