Error Code P0AFC: What It Means & What To Do?

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The trouble code P0AFC can be defined as Hybrid Battery Pack Sensor Module. The hybrid battery pack temperature is being monitored by the engine control module. This trouble code would be set by the ECM when the hybrid battery pack temperature would not be as per the specifications set by the manufacturer.

The high voltage battery pack is monitored by the Hybrid Battery Smart Unit. The battery smart pack would run its own self-check to ensure it is capable of performing its required functions. Now if it would fail the self-check, then the P0AFC error code would be stored. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

What causes this problem with the Hybrid Battery Pack Sensor Module?

• Malfunctioning hybrid battery pack
• Hybrid battery pack harness might be open or little
• Substandard electrical connection in the hybrid battery pack circuit

1. Hybrid Drive Cooling Pump - Check for faults in the hybrid battery cooling pump and replace it, if required. If the cooling pump does not function properly, then the battery might not work to its full capacity and can cause serious performance issues.
2. Battery Temperature Sensor - Inspect for faulty battery temperature sensor as it may cause the battery to overheat and not work properly and cause serious physical damages to various starting and charging system components. Thus, replace faulty sensor now!
3. Hybrid Battery - The battery itself can be faulty and can be overheating, which can lead to faster discharge and slower charging, with risks of leakages and other damages to the vehicle. Thus, immediate replacement is advisable.
4. Engine Control Module - Want to know the most common reason behind the failure in the engine control module? Corrosion or damage because of moisture can cause ECM failure. Corrosion might enter the ECM through the wiring harness and moisture can enter by a failure in the seals in the ECM itself.
5. Car Battery - Faulty car battery can have the problem of overheating and fast discharging. Thus, it can affect the motor performance as well as damaged major components. Replace it immediately.
6. Powertrain Control Module - The PCM makes the engine and transmission work in tandem. Any issue with the powertrain control module will cause major problems with the efficient running of the vehicle.
7. Electronic Control Unit - If your vehicle fails to start for no apparent reason, this is also a good indicator that there can be some issues with the ECU. If you check the car battery, starter and other common electrical components, and the vehicle still does not start, a quirky electronic control unit should be the next logical thing to consider.
8. Inverter Cooler Pump - The inverter cooler pump can also be faulty and not respond to the PCM instructions. This means that even though the temperature sensor and the PCM are working properly, the cooler pump may not work and cause damage to the battery functions. Thus, replace it immediately.

Willing to know some common symptoms of OBD Trouble Code P0AFC? Your wish is our demand. Have a look at them below:

Common Symptoms

• Visibility in the check engine light

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 P0AFC:

• Carefully adjust the faults in the hybrid battery pack
• It is essential to restore the flawed hybrid battery pack harness
• Rehabilitate the defaults in the hybrid battery pack circuit
• Recondition the non-functioning PCM/ECM

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• A technician begins by hooking the vehicle to an OBD-II scanner to verify that the code is present, and check for other codes. The freeze frame data along with current data is recorded, and the codes are then cleared to see if they reoccur.
• Visual inspection of the wiring and connectors to check for loose connections, corrosion, or shorts is done.
• A specialized tool may be used to test the hybrid battery pack sensor module. Other tests of the hybrid battery pack sensor and its components may help pinpoint the problem, as well as inspection of the wiring and connectors.
• Disconnect and check the resistance and signal voltage from the hybrid battery pack sensor. If all the components check out, inspect for the fault in the PCM as it can sometimes store wrong OBD code and thus might need replacement or reprogramming.

Common Mistakes When Diagnosing The P0AFC Code

• Failure in the battery smart unit
• Issues related to the wiring