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What are the symptoms for P0AB4 error code? What causes this error to get stored in the vehicle? Are you looking for this information? Keep reading. The hybrid battery pack air temperature sensor 'B' circuit high is caused by a faulty high voltage control module. The temperature of the ambient air which is found in and around the hybrid battery pack is informed to the high voltage control module by the battery pack air temperature sensor. The P0AB4 error will be set if an incorrect signal is found in the hybrid battery pack air temperature sensor by the high voltage control module. Most vehicles have this temperature sensor as a part of the battery pack assembly

The HV battery assembly already has intake air temperature sensor. With a change in intake air temperature, the resistance value changes. Both the intake air temperature sensor and the battery temperature sensor will have similar features. The signal from the intake air temperature sensor is utilized by battery ECU so as to adjust the air flow speed of battery blower assembly.

What causes this problem with the Hybrid Battery Pack Air Temperature Sensor "B" Circuit High?

• Defective HV battery assembly.
• HV battery assembly harness might have an opening or short circuit.
• HV battery assembly circuit might have a weak electrical circuit.
• Battery ECU might be defective.

1. Engine Control Module - Performance issue may arise in your vehicle if the ECM is defective. Replace the defective ECM by shopping for a new one from PartsAvatar.
2. Powertrain Control Module - Illumination of the check engine light is a common symptom of faulty PCM. Change it immediately.
3. HV Battery Assembly - Get the right replacement for your faulty HV battery assembly from PartsAvatar at best prices online.
4. Hybrid Battery Pack - A damaged hybrid battery pack will start emitting strange noises from the engine. It is best to replace the damaged hybrid battery pack.
5. Battery - The engine will start cranking slowly if the batteries are damaged. Replace it quickly to avoid the P0AB4 error code.

For us our customers are everything, and that’s why we will help you to diagnose P0AB4 code by mentioning some important symptoms below:

Common Symptoms

• Signs of misfiring.
• Fuel consumption might be increased.
• The service engine warning light or else the engine light will stay on.
• Weak performance by the engine

After you know the symptoms of your vehicle’s problem, it becomes easy to detect it and get started with solving it. So, next on our list is a few common steps to correct this issue with your vehicle’s.

• The damaged hybrid battery pack and hybrid battery pack harness need fixation.
• Fixing the defective engine control module/ powertrain control module.

Apart from this, you might need to replace other damaged parts too like HV battery assembly, HV battery assembly harness, battery ECU and more. You can easily find all these parts with us. Not only that you can get these parts shipped to your door free if your cart value happens to exceed $99.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0AB4 code to be stored:

• This is a general type of diagnostic trouble code where the mechanic will use a scanner to identify the error code that is stored in the vehicle.
• Every of the freeze frame data and stored codes will be recovered by connecting a scanner to the diagnostic port of the vehicle.
• This information can help the mechanic with further diagnosis.
• Initially, the mechanic will start inspecting the hybrid battery pack and hybrid battery pack harness for any possible damages or defects.
• If there are no faults or stored error codes the mechanic will go about checking the components like battery cables, battery control module and so on if they are defective or broken.
• As a very rare case, the mechanic may come across the engine control module/ powertrain control module which might be faulty or broken. The mechanic will address this issue accordingly.
• Once the diagnosis is fully done, the mechanic will reset the code and try to test drive the vehicle to see if the engine light keeps flashing and if the error code still appears.
• This process will eventually help the mechanic to know as to where the actual fault arises.

Common Mistakes When Diagnosing the P0AB4 Code

• The faulty high voltage battery assembly
• Troublesome electrical wires.
• The level of the engine oil is less.
• High voltage control module might be faulty.