Hybrid Battery Temperature Sensor Correlation Failure
The P0C72 code indicates that the hybrid battery temperature sensors are reporting values that are out of correlation with each other. This means the sensors are not agreeing on the temperature readings, which can lead to incorrect battery cooling or heating control. The hybrid battery control module monitors these sensors to ensure proper thermal management. A correlation fault suggests a sensor may be faulty, wiring issues, or a problem with the battery control module itself.
01. Most Common Causes
- Faulty hybrid battery temperature sensor
- Damaged or corroded wiring/connectors to the sensor
- Malfunctioning hybrid battery control module
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced hybrid system performance or limp mode
- Possible battery overheating or cooling system activation
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to read all hybrid battery temperature sensor values and compare them.
Step 2: Visually inspect the sensor wiring and connectors for damage or corrosion.
Step 3: Test the resistance of each temperature sensor according to manufacturer specifications.
Step 4: If sensors and wiring are okay, check the hybrid battery control module for faults.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can lead to improper battery temperature management, potentially causing battery damage or reduced performance. Have the vehicle inspected as soon as possible.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, depending on whether a sensor needs replacement or if wiring repairs are needed. Labor costs vary by shop.