Guide To P0C44 OBD Error Code Solutions

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The trouble code P0C44 can be explicated as Hybrid Battery Pack Coolant Temperature Sensor Circuit Low. If the engine control module would detect a variation in the voltage coming from the hybrid battery pack coolant temperature sensor circuit that is outside the parameters set by the automobile manufacturer, then it would store the P0C44 error code. This would also give rise to the illumination of the check engine light.

The brighter you are, the more you have to learn! That’s why we are here to provide you more knowledge about the P0C44 trouble code. The nickel metal-hydride batteries are used by the HV battery and there is no need of charging externally. The power management control ECU controls the SOC of the HV battery at a constant level while driving. There are 28 modules in the HV battery and every module would consist of eight 1.2 V cells in series. The battery block voltage at 14 locations is monitored by the battery smart unit. There are 2 modules in a set of every battery block.

What causes this problem with the Hybrid Battery Pack Coolant Temperature Sensor Circuit Low?

• Some flaws in the hybrid battery pack coolant temperature sensor
• Hybrid battery pack coolant temperature sensor harness might be opened or sometimes shorted
• Hybrid battery pack coolant temperature sensor circuit might have inadequate electrical connection

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 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. 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.
4. 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.
5. 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.
6. 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.
7. 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.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0C44 here:

Common Symptoms

• Illumination in the service engine soon light
• Operation of the high voltage system might not be possible

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 P0C44:

• You must fix the defective hybrid battery pack coolant temperature sensor
• It is essential to restore the flawed hybrid battery pack coolant temperature sensor harness
• Rehabilitate the defaults in the PCM/ECM
• Carefully adjust the faults in the hybrid battery pack coolant temperature sensor circuit
• The dash check engine light should be restored to working order

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

• Make sure that the battery cable connections are tight and clean. Some people think that it is an obvious step, but if your computer does not get a steady feed of electricity from the battery, it can cause multiple issues.
• Check for wires and connectors that might be rubbed through, disconnected or loose. It is also important to check the hybrid battery pack coolant temperature sensor properly.
• It is also important to make sure that the fuses are good. Make sure that there is no melted plastic that can cause fire.
• These are some of the major wiring problems that you will encounter with error code P0C44. Once you have completely checked all the obvious things and still you can’t find the right solution, then you have to begin suspecting either the computer or the sensor.

Common Mistakes When Diagnosing The P0C44 Code

• Some issues related to the battery energy control module
• Failure in the high voltage battery pack coolant temperature sensor
• Issues associated to the wiring