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 the car's computer found a problem with the temperature sensors in the battery of a hybrid or electric vehicle. It's like when a thermometer gives different readings when measuring the same thing, which can confuse the car.
The vehicle's control module has detected that the readings from two battery temperature sensors (D and E) do not match as expected.
The P0C71 code is triggered when the Powertrain Control Module (PCM) or Battery Energy Control Module (BECM) detects a discrepancy in the temperature readings between battery temperature sensors D and E. These sensors are crucial for monitoring the battery's temperature to ensure optimal performance and safety. A correlation error indicates that the sensors are not providing consistent data, which could lead to improper battery management.
• Check Engine Light is on
• Reduced battery performance
• Inconsistent battery charging or discharging
• Possible vehicle performance issues
• Faulty battery temperature sensor D
• Faulty battery temperature sensor E
• Wiring issues or poor connections in the sensor circuit
• Faulty Battery Energy Control Module (BECM)
• Software issues in the vehicle's control module
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting in vehicles.
BECM: Battery Energy Control Module, responsible for managing the battery system in hybrid and electric vehicles.
• Use an OBD-II scanner to confirm the P0C71 code.
• Inspect the wiring and connectors for sensors D and E for damage or corrosion.
• Test the battery temperature sensors for proper operation.
• Check the Battery Energy Control Module for faults.
• Replace faulty battery temperature sensor(s).
• Repair or replace damaged wiring or connectors.
• Update or reprogram the vehicle's control module software.
• Replace the Battery Energy Control Module if necessary.
• OBD-II scanner
• Multimeter
• Wiring repair tools
• Replacement sensors or control module
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance and inspection of battery components.
• Ensure proper connections and wiring integrity.
• Keep vehicle software up to date.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent battery damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Repairs may be covered under the vehicle's powertrain or hybrid system warranty. Check with the manufacturer.
This code has been reported more frequently as hybrid and electric vehicles become more common. It highlights the importance of accurate battery monitoring.
High – Incorrect temperature readings can lead to battery damage or reduced vehicle performance.
Ignoring this code may lead to safety risks, including battery overheating. It is advised to address the issue promptly.
• Vehicle should be at operating temperature.
• Ensure the battery is under load to test sensor readings accurately.
Battery temperature sensors are typically located within the battery pack of the hybrid or electric vehicle.
Q: Can I drive with a P0C71 code?
A: It's not recommended to drive with this code, as it may lead to battery damage or reduced performance.
Q: How do I reset the P0C71 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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