What Does P0C35 Mean?
DTC P0C35 indicates hybrid battery temperature sensor F circuit voltage is below the minimum expected threshold. For a typical NTC thermistor, a low voltage reading corresponds to a very high resistance, which usually indicates an open circuit, disconnected sensor, or a break in the wiring. The BMS interprets this as an extremely low or invalid temperature reading.
Common Causes
30%
Open circuit in the sensor F wiring harness
25%
Disconnected or damaged connector at temperature sensor F
20%
Failed thermistor with internal open circuit
15%
Corroded sensor pins causing extremely high contact resistance
10%
BMS pull-up/pull-down resistor fault on the sensor F input
Diagnostic Steps
1
Confirm sensor F reads an abnormally low voltage or implausible low temperature on the scan tool.
2
Locate sensor F and verify the connector is fully seated and locked — reconnect if it was dislodged.
3
Measure thermistor resistance — an open-line (infinite resistance) reading confirms a failed sensor or broken wire.
4
Perform a continuity test on each wire between the sensor connector and the BMS connector.
5
If the sensor and wiring check good, test the BMS input circuit bias voltage to confirm it is providing proper excitation.
Estimated Repair Cost
$150 - $1,000
Parts + labor, varies by vehicle and location
DTC P0C35 indicates hybrid battery temperature sensor F circuit voltage is below the minimum expected threshold. For a typical NTC thermistor, a low voltage reading corresponds to a very high resistance, which usually indicates an open circuit, disconnected sensor, or a break in the wiring. The BMS ...
The most common cause of P0C35 (Hybrid Battery Temperature Sensor "F" Circuit Low) is: Open circuit in the sensor F wiring harness
Typical repair costs for P0C35 range from $150 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A low circuit reading effectively removes one temperature monitoring point from the battery pack. While the BMS uses multiple sensors for safety, a missing data point reduces the system's ability to detect localized thermal events. Repair to restore full thermal monitoring coverage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0C35 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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