P0AC3 OBD Error Code: Problem & Solutions

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The trouble code P0AC3 can be explained as Hybrid Battery Pack Current Sensor “A” Circuit Intermittent/Erratic. The battery current sensor is mounted on the positive cable side of the HV battery assembly which would detect the amperage that would flow into the HV battery. The battery smart unit would input a voltage which varies between 0 and 5 V in proportion to the amperage, into the IB terminal from the battery current sensor. This error code would give rise to the illumination of the check engine light.

The error code P0AC3 would start triggering when the battery control module would detect some faults in hybrid battery pack current sensor “A” circuit. One thing which you must keep in mind that its symptoms as well as causes would surely vary as it depends upon a number of things.

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

• Some issues related to the battery smart unit
• Unlocked battery smart unit harness
• Unsatisfactory electrical connection in the battery smart unit circuit
• There can be inoperative hybrid battery junction block

1. Hybrid Battery - A hybrid battery that has dead traction can be very problematic. It can result into a delayed or instant release of gases that are toxic or flammable. We recommend you to change it instantly without taking the risk of touching it as it may lead to a shock.
2. Engine Control Module - If there is any corrosion or breaks in the internal wiring of the harness, then it can cause a short in the ECM or can also cause corrosion in the ECM through the wiring harness. You can always rely on us as we have the best auto parts for our customers.
3. Inverter Cooler Pump - As part of the cooling system, the inverter coolant pump translates high-voltage direct current generated by hybrid batteries into alternating current for the motor to keep the system at the proper operating temperature. Thus, if the cooler pump if faulty, it should be replaced immediately.
4. Battery Temperature Sensor - A symptom commonly associated with a failing battery temperature sensor is an engine that surges during operation. The battery temperature sensor helps the system continuously adjusts the system voltage, and if it fails, this process may be disturbed. Thus, replace it now!
5. Powertrain Control Module - The onboard computer, or powertrain control module is the brain of the engine control system. Now if the brain is not working properly, then neither is the car engine. Get it replaced before the situation gets worse.
6. Electronic Control Unit - Is your car jump starting on reverse polarity? Or are you facing some intermittent starting issues? If yes, then it indicates that your electronic control unit is bad. So, it is very important to replace the defective electronic control unit with us at equitable prices.
7. Diagnostic Tool - Use high grade diagnostic tools and equipment to resolve OBD code error. Buy new tools and equipment form us now! 

There could be countless symptoms that would accompany this fault code. Willing to know some common symptoms of OBD Trouble Code P0AC3? Your wish is our demand. Have a look at them below:

Common Symptoms

• Check engine light might come into signal

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• It is necessary to perform proper service of the unsound PCM/ECM
• You must fix the defective battery smart unit
• The battery smart unit harness should be restored to working order
• Recondition the non-functioning battery smart unit circuit
• Adjust the flawed hybrid battery junction block

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of HV battery temperature sensor, HV battery assembly, battery smart unit, HV battery assembly harness, hv battery, pcm, ecm, ecu, pcm module, ecm module and a lot more. We are sure that now all your issues would be resolved.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0AC3 code to be stored:

After verifying the P0AC3 code with an OBD-II scanner, the mechanic should begin with a visual inspection of all electrical components, especially looking for some issues in the hybrid battery pack current sensor “A” circuit. Any issues should be repaired, and the code should be cleared from the system. If the code reappears after a retest, the mechanic should then move on to performing voltage tests and resistance tests on the sensor, and comparing the information to the manufacturer’s specifications. If the readings are within the correct limits, then the sensor needs to be replaced. However, if the readings are not within the correct limits, then the issue lies elsewhere. The mechanic should continue checking each possible cause, clearing the code and retesting the system after each attempt, to be sure that the correct solution is found.

Common Mistakes When Diagnosing The P0AC3 Code

• There can be a failure in the battery control module
• Quirks in the battery current sensor
• High voltage battery assembly related problems