Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a sensor in the car that checks how hot or cold the battery is, is not working right. It's saying the temperature is too high, but it might be wrong.
The P0C90 code indicates that the vehicle's control module has detected a high voltage condition in the circuit of the battery temperature sensor labeled 'J'.
The Hybrid/EV Battery Temperature Sensor J is responsible for monitoring the temperature of the battery pack. If the sensor or its circuit reports a voltage that is higher than the expected range, the control module triggers the P0C90 code. This could be due to a short circuit, a faulty sensor, or issues with the wiring.
• Check Engine Light is on
• Reduced fuel efficiency
• Poor battery performance
• Possible overheating of the battery
• Faulty battery temperature sensor
• Short circuit in the sensor wiring
• Poor electrical connection
• Faulty control module
OBD-II: On-Board Diagnostics, a standardized system in cars for self-diagnosing and reporting.
Multimeter: A tool used to measure voltage, current, and resistance in electrical circuits.
• Use an OBD-II scanner to confirm the code.
• Inspect the battery temperature sensor and its wiring for damage.
• Measure the voltage at the sensor to check for shorts or open circuits.
• Test the sensor's resistance and compare it to specifications.
• Replace the faulty battery temperature sensor.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive to ensure the issue is resolved.
• If the issue persists, inspect the control module.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery connections.
• Ensure proper ventilation around the battery.
• Schedule regular maintenance checks.
Sensor Issue
• Avoid driving the vehicle aggressively until the issue is fixed.
• Monitor the vehicle's performance for any changes.
Check with the manufacturer; the battery and related components may be covered under warranty.
This code has been more common in older hybrid and electric models as battery technology has evolved.
Moderate – It should be addressed soon to prevent potential battery damage.
Ignoring this issue may lead to further battery damage, which can be costly and potentially hazardous.
• Vehicle must be in a safe location.
• Ensure the battery is cool before inspection.
The battery temperature sensor is typically located within or near the battery pack of the vehicle.
Q: Can I drive with the P0C90 code?
A: It's not recommended to drive for long periods with this code active, as it can lead to battery damage.
Q: How do I reset the P0C90 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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