Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a sensor that checks how hot or cold the battery is in a hybrid or electric car. It's like a thermometer for the car's battery, and it's not working right.
The P0AC5 code indicates an issue with the circuit of the temperature sensor that monitors the temperature of the hybrid or electric vehicle's battery pack.
The P0AC5 code is triggered when the powertrain control module (PCM) or battery energy control module (BECM) detects a malfunction in the circuit of the battery temperature sensor B. This sensor helps monitor the temperature of the battery pack to ensure it operates within safe limits. A fault in this circuit can lead to improper battery management and performance issues.
• Check Engine Light illumination
• Reduced fuel efficiency
• Possible battery overheating
• Limited power output
• Faulty battery temperature sensor
• Damaged or corroded wiring or connectors
• Faulty battery energy control module (BECM)
PCM: Powertrain Control Module
BECM: Battery Energy Control Module
• Use an OBD-II scanner to verify the code.
• 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.
• Replace the battery energy control module if necessary.
• OBD-II scanner
• Multimeter
• Wiring repair tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular inspection of battery components
• Ensure proper battery cooling system maintenance
• Avoid extreme temperature exposure
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Avoid driving in extreme temperatures until repaired.
Battery and related components may be covered under warranty. Check with the manufacturer.
This code is relatively common in older hybrid/EV models as sensors and wiring can degrade over time.
Moderate – It should be addressed soon to prevent battery damage.
Driving with a malfunctioning battery temperature sensor can lead to battery damage or reduced vehicle performance.
• Vehicle at operating temperature
• Battery under load conditions
The battery temperature sensor is typically located within the battery pack or near it, depending on the vehicle model.
Q: Can I drive my car with a P0AC5 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to battery damage.
Q: How do I reset the P0AC5 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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