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 is getting a signal that says one of the sensors checking the temperature of the hybrid or electric car's battery is too low. It's like a thermometer that's not working right.
The vehicle's control module has detected a low voltage signal from the hybrid/EV battery temperature sensor 'C' circuit, which indicates an issue with the sensor or its circuit.
The P0ACC code is triggered when the Powertrain Control Module (PCM) or Battery Management System (BMS) detects a voltage signal lower than the expected range from the hybrid/EV battery temperature sensor 'C'. This sensor is responsible for monitoring the temperature of the battery pack to ensure it operates within safe limits. A low signal could be due to a faulty sensor, wiring issues, or a problem with the control module.
• Check Engine Light illuminated
• Reduced fuel efficiency
• Possible battery overheating or underperformance
• Faulty hybrid/EV battery temperature sensor
• Damaged or corroded wiring or connectors in the sensor circuit
• Faulty PCM or BMS
PCM: Powertrain Control Module
BMS: Battery Management System
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the wiring and connectors for damage or corrosion.
• Test the battery temperature sensor for proper operation.
• Replace the faulty battery temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM or BMS if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance and inspection of battery systems
• Ensure proper ventilation and cooling of the battery pack
• Avoid exposing the vehicle to extreme temperatures
Sensor Issue
• Avoid driving aggressively until the issue is resolved.
• Schedule a service appointment with a qualified technician.
Battery-related components may be covered under a separate warranty for hybrid/EV vehicles. Check with the manufacturer.
This code has become more common with the rise of hybrid and electric vehicles, as battery management systems have become more sophisticated.
Moderate – While the vehicle may still operate, ignoring this issue could lead to battery damage or reduced performance.
Operating a vehicle with a malfunctioning battery temperature sensor can lead to safety risks, including battery overheating.
• Vehicle at operating temperature
• Battery pack properly charged
The hybrid/EV battery temperature sensor is typically located within the battery pack, often near the center or at strategic points to monitor temperature variations.
Q: Can I drive my car with a P0ACC code?
A: It's not recommended to drive for extended periods with this code, as it could lead to battery damage.
Q: How do I reset the P0ACC 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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