AutoCodes – Generic – P0C72

P0C72 Code - Hybrid Battery Temperature Sensor 'E'/'F' Correlation

Quick Answer

The battery temperature sensors are provided at 3 locations of the HV battery. Common causes include Faulty Hybrid battery thermistor, Faulty Battery smart unit, Hybrid battery thermistor harness is open or shorted. 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: P0C72 indicates Hybrid Battery Temperature Sensor 'E'/'F' Correlation.
Common causes: Common causes include Faulty Hybrid battery thermistor, Faulty Battery smart unit, Hybrid battery thermistor harness is open or shorted.
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 1,453

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Feb 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0C72 Description

The battery temperature sensors are provided at 3 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery smart unit uses the battery temperature sensors to detect the HV battery temperature, and sends the detected value to the power management control ECU. Based on the results of this detection, the power management control ECU controls the blower fan. (The blower fan starts when HV battery temperature rises above a predetermined level.)

OBDII Code P0C72 - Hybrid Battery Temperature Sensor 'E'/'F' Correlation - AutoCodes.com — P0C72 Code - Hybrid Battery Temperature Sensor 'E'/'F' Correlation

What does this mean?

What are the Possible Causes of the DTC P0C72?

Faulty Hybrid battery thermistor
Faulty Battery smart unit
Hybrid battery thermistor harness is open or shorted
Hybrid battery thermistor circuit poor electrical connection

How to Fix the DTC P0C72?

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 P0C72 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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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 P0C72 Code

What does the OBDII code P0C72 mean?

Code P0C72 indicates a correlation issue between the readings of Hybrid Battery Temperature Sensors ‘E’ and ‘F,’ suggesting inconsistent or implausible data.

What are the common symptoms of code P0C72?

Symptoms may include the hybrid vehicle entering a limited power mode, reduced fuel efficiency, warning lights on the dashboard, or overheating of the hybrid battery.

What causes the P0C72 code to trigger?

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

Can I drive my car with the P0C72 code active?

While the vehicle may still be drivable, ignoring this code could lead to hybrid battery damage or reduced vehicle performance. It’s best to address the issue promptly.

How do you diagnose the P0C72 code?

A mechanic will use a scan tool to monitor sensor readings, inspect the wiring and connectors related to the sensors, and rule out issues with the hybrid control module or battery pack.

How can this code be fixed?

Repairs may include replacing the faulty temperature sensor, repairing damaged wiring, cleaning corroded connectors, or recalibrating the hybrid control module.

How much does it cost to fix code P0C72?

Repair costs vary depending on the issue but may range from $100 to $500, with sensor replacement being one of the most common fixes.

How do I prevent the P0C72 code in the future?

Regular maintenance of the hybrid battery system, including ensuring proper airflow and avoiding extreme temperature exposure, can help prevent this issue.

Can a bad hybrid battery cause the P0C72 code?

Yes, a malfunctioning or overheating hybrid battery can cause inconsistent temperature readings and trigger this code.

Will resetting the code fix the issue?

Clearing the code without addressing the underlying problem may temporarily remove the warning, but the code will likely return until the root cause is resolved.