Error Code P0AC2: What It Means & What To Do?

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The trouble code P0AC2 can be described as Hybrid Battery Pack Current Sensor “A” Circuit High. If the battery control module would detect a variation in the voltage coming from the hybrid battery pack current sensor “A” circuit that is outside the parameters set by the automobile manufacturer, then it would store the P0AC2 error code. This would also give rise to the illumination of the check engine light.

There is a current sensor mounted to the negative battery cable in the high voltage battery pack. This sensor would inform the battery control module if the battery pack is being charged or discharged.

What causes this problem with the Hybrid Battery Pack Current Sensor “A” Circuit High?

• There can be distorted battery smart unit
• Battery smart unit harness is open or small
• Battery smart unit circuit might have inadequate electrical connection

1. Battery Temperature Sensor - Faulty temperature sensor will not be able to interpret the battery temperatures which can cause overheating and leakages inside the battery that can cause harm to various components and can be dangerous to driver’s safety also. Thus, replace it at first instance.
2. Battery Coolant Pump - Battery coolant pump plays a vital role in keeping the battery pack cool while operating and keeping it from overheating. Thus, check and replace faulty pump as it can be the reason for temperature sensor indicating out of bound readings.
3. Cooling System Parts - There can be many components in the cooling system that can be faulty, causing battery overheating and underperforming. So, replace the faulty components immediately.
4. Engine Control Module - It is not always the components, but the ECM that can also be faulty. It can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
5. Hybrid Drive Cooling Pump - The cooling pump play a major role in keeping the battery temperatures under control and ensuring proper functioning. If the pump gets damaged, it can lead to increased temperatures that can hamper many starting and charging parts. Thus, replace it immediately, if found damaged.
6. Powertrain Control Module - Powertrain Control Module can also be faulty in rare cases and thus needs through checks for system and software errors. Thus, check and replace it, if required.
7. Hybrid Battery - If the battery is at fault, it can also be the reason for battery overheating, which can lead to temperature sensor going out of specification. Buy new hybrid battery now!
8. Car Battery & Cables - Most of the time the battery cables and connectors are at fault for a particular component not functioning properly. Thus, the battery cable and connector should be checked for and replace in time.
9. Diagnostic Tools - It is always advisable to use the correct tools and equipment while resolving any OBD code issue as even small mistakes can lead to wrong diagnosis. Thus, always take help from a professional who has the knowledge and experience to such tools in an efficient manner. Buy new quality diagnostic tools from us today!

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P0AC2. They are mentioned here as follows:

Common Symptoms

• Check engine light can start flashing up
• High voltage system might not function properly

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0AC2:

• Repair or replace the quirky battery smart unit
• Rehabilitate the defaults in the battery smart unit harness
• The malfunctioning hybrid battery junction block should be repaired or replaced as per the need
• Carefully adjust the faults in the battery smart unit circuit

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Do you wish to diagnose P0AC2 error code easily? Here are some steps which you should follow in order to diagnose this fault code:

• The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle.
• After performing a careful inspection, every of the stored codes and freeze frame data are retrieved as it can help down the way for further diagnosis process.
• Most often he has to inspect the hybrid battery itself to see if they are faulty or damaged. Additional error codes that are stored in the vehicle are also addressed.
• The mechanic performs a continuity test between the PCM and hybrid battery.
• If the hybrid battery pack current sensor “A” circuit or other related parts are not faulty, he will then retune the code and test drive the vehicle.
• Now when the car is taken out for a test drive, if the P0AC2 code does not return soon, he will know that there is an existence of erratic condition.

Common Mistakes When Diagnosing The P0AC2 Code

• The battery control module might start failing
• Non-observance of the battery current sensor
• Some issues with the high voltage battery assembly