What Does P0C37 Mean?
DTC P0C37 indicates hybrid battery temperature sensor F is exhibiting intermittent or erratic behavior. The signal fluctuates unpredictably, drops out momentarily, or shows sudden spikes that do not correlate with actual temperature changes. This type of fault is often the most challenging to diagnose because it may not be present during static testing.
Common Causes
30%
Loose or intermittent connector contact at the sensor or BMS
25%
Damaged wiring with broken strands making intermittent contact
20%
Thermistor degradation causing erratic resistance changes
15%
Vibration-induced intermittent contact at the sensor mounting
10%
Electromagnetic interference from nearby high-voltage components
Diagnostic Steps
1
Monitor sensor F live data on a scan tool during a drive or while tapping/wiggling the harness near the sensor to reproduce the intermittent fault.
2
Inspect the sensor connector for loose terminals, spread pins, or corrosion that could cause intermittent contact.
3
Flex and manipulate the sensor wiring while monitoring the signal for dropouts or spikes.
4
Check the sensor mounting for security — a loose sensor may lose thermal contact intermittently.
5
If the fault cannot be isolated to wiring, replace the thermistor sensor and monitor for recurrence.
6
Verify the wiring harness is properly routed away from high-voltage cables that could induce interference.
Estimated Repair Cost
$200 - $1,100
Parts + labor, varies by vehicle and location
DTC P0C37 indicates hybrid battery temperature sensor F is exhibiting intermittent or erratic behavior. The signal fluctuates unpredictably, drops out momentarily, or shows sudden spikes that do not correlate with actual temperature changes. This type of fault is often the most challenging to diagno...
The most common cause of P0C37 (Hybrid Battery Temperature Sensor "F" Circuit Intermittent/Erratic) is: Loose or intermittent connector contact at the sensor or BMS
Typical repair costs for P0C37 range from $200 to $1,100, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Intermittent sensor readings can cause the BMS to oscillate between normal and protective modes, resulting in unpredictable power availability. The erratic data also undermines the reliability of the thermal monitoring system. While not immediately dangerous, it should be repaired to ensure consistent battery protection.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C37 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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