The P0ACF: Hybrid Battery Temperature Sensor “D” Circuit refers to an issue with the temperature sensor “D” circuit in the hybrid battery pack. This issue can be caused by a faulty temperature sensor, wiring problems, or a circuit malfunction, leading to inaccurate temperature monitoring.
P0ACF – Quick Overview
Code | Information |
---|---|
Meaning | P0ACF: Hybrid Battery Temperature Sensor “D” Circuit |
Is it serious? | Yes, inaccurate temperature readings can affect battery management and hybrid system performance. |
Possible causes | – Faulty temperature sensor D – Wiring issue – Sensor circuit problem |
How to diagnose? | – Test temperature sensor D circuit – Inspect wiring for damage or disconnection – Test sensor functionality |
P0ACF Meaning
The P0ACF: Hybrid Battery Temperature Sensor “D” Circuit code indicates that there is an issue with temperature sensor “D” in the hybrid battery pack. This sensor monitors the battery’s temperature, and a fault in the circuit could lead to improper temperature regulation, potentially affecting the hybrid system’s performance and efficiency.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to check for additional related codes that may provide more insight into the issue with the hybrid battery system. | OBD-II Scanner |
Test Temperature Sensor D Circuit | Use a multimeter to measure the voltage and resistance in the temperature sensor D circuit to ensure it is functioning within specifications. | Multimeter |
Inspect Wiring for Damage | Inspect the wiring connected to temperature sensor D for any signs of damage, corrosion, or disconnection. | Flashlight, Multimeter |
Test Sensor Functionality | Test the functionality of temperature sensor D to ensure it is providing accurate temperature readings. | Multimeter, Diagnostic Tool |
Clear the Code and Test Drive | After repairs, clear the code with an OBD-II scanner and take the vehicle for a test drive to confirm the issue is resolved. | OBD-II Scanner |
Recheck for Codes | After the test drive, scan the vehicle again to ensure the P0ACF code has not returned. | OBD-II Scanner |
Free PDF: How to choose OBD2 scanner

I’ve made you a free PDF to choose the OBD2 scanner in 5 minutes.
✅ Which OBD2 scanner is best?
✅ Which type should you get (DIY, Pro, Hobby)
✅ What is the best scanner for the exact brand/feature (e.g best for BMW)
✅ How to get a Bi-Directional tool for as cheap as $40
✅ Discount coupons for scanners
PDF is 100% free and it is designed to help you pick a scanner in less than a few minutes! Not a boring 50-page guide.
Just tell me where to send it.

Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)