What Does P0C82 Mean?
DTC P0C82 indicates that hybrid battery temperature sensor H is reporting values outside the expected performance range. The sensor is electrically functional and providing a signal, but the readings do not correlate with other sensors, ambient conditions, or expected battery operating temperatures. This is a rationality or plausibility check failure for the sensor H zone.
Common Causes
35%
NTC thermistor at sensor H drifting out of specification
25%
Degraded thermal interface between sensor H and the battery module
20%
High-resistance connection in the sensor H circuit skewing readings
12%
Genuine localized temperature anomaly at sensor H location
8%
BMS ADC calibration drift on the sensor H input channel
Diagnostic Steps
1
Compare sensor H readings to all other battery temperature sensors and ambient temperature to quantify the deviation.
2
Measure the actual temperature at the sensor H location with a calibrated external thermometer to determine if the fault is the sensor or a real thermal anomaly.
3
Test sensor H thermistor resistance at a controlled reference temperature against the manufacturer's R-T curve.
4
Check for high-resistance connections in the sensor H circuit that could introduce voltage drop error.
5
Verify the sensor is properly seated and making good thermal contact with the battery module.
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
DTC P0C82 indicates that hybrid battery temperature sensor H is reporting values outside the expected performance range. The sensor is electrically functional and providing a signal, but the readings do not correlate with other sensors, ambient conditions, or expected battery operating temperatures....
The most common cause of P0C82 (Hybrid Battery Temperature Sensor "H" Range/Performance) is: NTC thermistor at sensor H drifting out of specification
Typical repair costs for P0C82 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Inaccurate temperature data from sensor H can lead the BMS to make wrong thermal management decisions for that battery zone. This could result in either premature power limiting or insufficient thermal protection depending on the direction of the error.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C82 to identify the root cause.
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Quick Info
Category
Powertrain
System
Hybrid Battery Thermal Management
Difficulty
Type
Generic (SAE)
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