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 how two temperature sensors in the hybrid or electric vehicle's battery are working together. It's like when two thermometers show different temperatures for the same thing.
The vehicle's control module detects a discrepancy between the readings of two battery temperature sensors, labeled C and D.
The P0C70 code is triggered when the Powertrain Control Module (PCM), Battery Management System (BMS), or other control module identifies a correlation issue between the temperature readings from Battery Temperature Sensor C and Sensor D. These sensors are crucial for monitoring the battery's temperature to ensure optimal performance and safety. A correlation issue indicates that the sensors are not providing consistent or expected data, which could affect battery management and overall vehicle performance.
• Illuminated check engine light
• Reduced fuel efficiency
• Limited power output
• Unusual battery temperature readings
• Vehicle may enter limp mode
• Faulty battery temperature sensor C
• Faulty battery temperature sensor D
• Wiring issues or poor connections
• Malfunctioning Battery Management System (BMS)
• Software issues in the vehicle's control module
PCM: Powertrain Control Module
BMS: Battery Management System
• Use an OBD-II scanner to confirm the P0C70 code.
• Inspect the wiring and connectors for sensors C and D.
• Test the functionality of both temperature sensors.
• Check for any software updates for the vehicle's control module.
• Examine the Battery Management System for faults.
• Replace faulty temperature sensor C or D.
• Repair or replace damaged wiring or connectors.
• Update the vehicle's control module software.
• Reset the Battery Management System.
• Conduct a thorough test drive to ensure the issue is resolved.
• OBD-II scanner
• Digital multimeter
• Wire repair kit
• Thermal imaging camera
• Diagnostic software
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regularly inspect battery sensors and wiring.
• Ensure the vehicle's software is up-to-date.
• Perform routine maintenance checks on the hybrid/EV system.
Sensor Issue
• Avoid driving in extreme temperatures until the issue is resolved.
• Seek professional diagnostics if the check engine light is on.
• Monitor vehicle performance for any unusual changes.
Battery and related components may be covered under warranty, depending on the vehicle's age and mileage.
This code is relatively common in hybrid and electric vehicles due to the complexity of battery management systems.
Moderate – It should be addressed soon to prevent potential battery damage or reduced vehicle performance.
Ignoring battery temperature issues can lead to safety risks, including battery overheating.
• Vehicle at operating temperature
• Battery under load conditions
Battery temperature sensors are located within the battery pack, usually near the battery cells.
Q: Can I drive my car with a P0C70 code?
A: It's not recommended to drive for extended periods with this code, as it may lead to battery issues.
Q: How do I reset the P0C70 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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