P0C45 - OBD Trouble Code

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The trouble code P0C45 can be defined as Hybrid Battery Pack Coolant Temperature Sensor Circuit High. The error code P0C45 would start triggering when the PCM would detect some fault in hybrid battery pack coolant temperature sensor 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.

We learn more by looking for the answer to a question. That’s the reason why we are here to provide you the answers for all your questions. This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code. The P0C45 trouble code would indicate that a hybrid battery pack coolant temperature sensor circuit which is not as per the predetermined limit has been detected by the ECM. Now when this would occur, the fault code would be stored and there would be an illumination in the malfunction indicator light.

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

• There can be inoperative hybrid battery pack coolant temperature sensor
• There can be opened or shorted hybrid battery pack coolant temperature sensor harness
• Hybrid battery pack coolant temperature sensor circuit inferior electrical connection

1. Engine Control Module - The solenoid might cause a short in the engine control module because of corrosion in the solenoid or the wire running from the solenoid to the ECM harness. It would be nice if you get it replaced on time.
2. Battery Current Sensor - Most of the time the battery current sensor is faulty and is unable to detect the battery operations properly and thus the reading doesn’t correlate with the temperature sensor readings, causing OBD code P0C34 to get stored in the PCM.
3. Battery Coolant Pump - It is important to understand the functioning and diagnosis of faulty coolant pump as it is the most important component for keep the battery temperatures under control and keeping it functional all the time. Thus, replace fault battery coolant pump now!
4. 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.
5. Car Battery & Cables - Most of the time it is the cables and connector that are at fault and are a cheap and easy way diagnose this error. Thus, replace faulty wiring and connectors immediately.
6. Diagnostic Tool - Make use of quality diagnostic tools to resolve any OBD error code. Buy quality diagnostic tools from us!
7. Battery Temperature Sensor - Temperature sensor measure the battery temperature so that it can be monitored for overheating and other problems in association with the battery. Thus, it is important for the temperature sensor to keep working properly and must be replace, if found faulty.
8. Powertrain Control Module - A trouble with the PCM would mean that it is unable to determine the right fuel mixture and would send the car engine either more or less fuel than it requires. Now when the engine gets more, the carbon emission would increase and fuel economy would drop. In case of the opposite, the engine will choke, stutter, and might start stalling sometimes.

Willing to know some common symptoms of OBD Trouble Code P0C45? Your wish is our demand. Have a look at them below:

Common Symptoms

• Visibility in the check engine light
• Non-operational high voltage system

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 P0C45:

• Make sure to mend the faulty hybrid battery pack coolant temperature sensor harness
• It is essential to restore the flawed hybrid battery pack coolant temperature sensor
• The malfunctioning hybrid battery pack coolant temperature sensor circuit should be repaired or replaced as per the need
• Carefully adjust the faults in the powertrain control module
• The electronic control unit should be restored to working order

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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 battery current sensor. Other tests of the hybrid battery pack coolant temperature 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 battery current sensor. If all the components check out, inspect for the fault in the PCM as it can sometime store wrong OBD code and thus might need replacement or reprogramming.

Common Mistakes When Diagnosing The P0C45 Code

• There can be some faults in the battery energy control module
• Negligence in the high voltage battery pack coolant temperature sensor
• Wiring problems