What Does P0C72 Mean?
DTC P0C72 indicates that hybrid battery temperature sensors E and F are not correlating within the expected tolerance. This is the last in the sequential sensor-pair correlation chain (A/B through E/F), and it signals that the temperature readings from these two adjacent zones are diverging beyond acceptable limits. This may be caused by sensor failure, wiring problems, or a real thermal anomaly in the battery pack.
Safety Warning
Without accurate temperature correlation across all battery zones, the BMS cannot reliably protect against thermal runaway. The vehicle may impose significant power restrictions or prevent EV mode engagement.
Common Causes
35%
Degraded or failed NTC thermistor at sensor E or F
25%
Damaged wiring or corroded connector at sensor E or F
20%
Actual thermal imbalance from cell degradation in zone E or F
12%
BMS control module internal processing fault
8%
Sensor not making proper thermal contact with battery module surface
Diagnostic Steps
1
Retrieve and analyze freeze frame data comparing sensor E and F temperature readings at the time the code was set.
2
Use a calibrated contact or IR thermometer to independently verify the actual temperatures at both sensor positions.
3
Inspect wiring harnesses and connectors for sensors E and F for corrosion, damage, or intermittent connections.
4
Test each thermistor resistance at a known reference temperature against manufacturer specifications.
5
Examine battery modules in zones E and F for physical evidence of cell degradation, swelling, or overheating.
6
If hardware checks are inconclusive, update or replace the BMS module.
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
DTC P0C72 indicates that hybrid battery temperature sensors E and F are not correlating within the expected tolerance. This is the last in the sequential sensor-pair correlation chain (A/B through E/F), and it signals that the temperature readings from these two adjacent zones are diverging beyond a...
The most common cause of P0C72 (Hybrid Battery Temperature Sensor "E"/"F" Correlation) is: Degraded or failed NTC thermistor at sensor E or F
Typical repair costs for P0C72 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Without accurate temperature correlation across all battery zones, the BMS cannot reliably protect against thermal runaway. The vehicle may impose significant power restrictions or prevent EV mode engagement.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C72 to identify the root cause.
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Quick Info
Category
Powertrain
System
Hybrid Battery Thermal Management
Difficulty
Type
Generic (SAE)
Recommended Tools
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