P0C49 - OBD Trouble Code

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The trouble code P0C49 can be explicated as Hybrid Battery Pack Coolant Pump Control Circuit High. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model. 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. The hybrid battery pack coolant pump control circuit is being monitored by the engine control module. This trouble code would be set by the ECM when the hybrid battery pack coolant pump control circuit would not be as per the manufacturers specifications.

Do you want to gain some more knowledge about the P0C49 trouble code? 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.

What causes this problem with the Hybrid Battery Pack Coolant Pump Control Circuit High?

• There can be distorted hybrid battery pack coolant temperature sensor
• Hybrid battery pack coolant temperature sensor harness is open or small
• Hybrid battery pack coolant temperature sensor circuit might have inadequate electrical connection

1. Engine Control Module - Most of the time it is difficult to intercept the ECM faults and thus must be checked for thoroughly. There can be a problem with the circuit or the software might have malfunctioned. Thus repair, replace or reprogram the component as per requirement.
2. Powertrain Control Module - If the PCM is faulty, it can store wrong OBD codes and can lead to misdiagnosis. This can happen due to misinterpretation of data received from the various sensors and components which also affects the vehicle’s performance. Thus, replace it immediately.
3. Diagnostic Tools - Use factory grade diagnostic tools to resolve OBD code P0C19 error. Buy new diagnostic tools and equipment for us.
4. Hybrid Battery - The hybrid battery is the heart of the drive motor and all the vehicle functions depend on it. Thus, if the battery is not charging, overcharging or discharging, it must be replaced to avoid any further damaged to various parts of the car.
5. Electronic Control Unit - The ECU power management control module keeps in check the hybrid battery charging functions. If the ECU is faulty, the battery pack will not be able to properly get charged and thus, the ECU might need replacement.

It is vital 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 P0C49 here:

Common Symptoms

• Check engine light might come into signal
• High voltage system not operating correctly

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• It is essential to restore the flawed hybrid battery pack coolant temperature sensor circuit
• Repair or replace the quirky hybrid battery pack coolant temperature sensor harness
• Rehabilitate the defaults in the hybrid battery pack coolant temperature sensor
• The malfunctioning PCM should be repaired or replaced as per the need
• It is necessary to perform proper service of the unsound generator assembly

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Here are some steps which you should follow in order to diagnose this fault code:

• This is a general type of error code which is diagnosed with the help of a scanner.
• The mechanic will insert a scanner to diagnostic port of the vehicle and recover the codes and freeze frame data.
• If he happens to find any additional error codes, he has to address them as well.
• Once it is done, he has to reset the vehicle, and then test drive to see if the error code appears.
• If the error code does not return, then there can be an erratic condition.
• But, if the error code returns, then the mechanic has to check the hybrid battery pack coolant temperature sensor.
• Also, the mechanic can check for any defect in the hybrid battery, and quickly fix the issue.
• Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective.
• If the issues are not yet sorted out, then the mechanic will use a digital voltmeter/ ohmmeter and connect it to the vehicle.
• Once the circuit is inspected, he will thoroughly check all the harness and repair them accordingly.
• Whenever the mechanic or a trained professional, repairs any of the component like wires or connectors, he will reset the code and test drive the vehicle again to see if the error code appears again.
• This can actually help the mechanic to know if the problem is fixed.

Common Mistakes When Diagnosing The P0C49 Code

• Non-performance of the high voltage powertrain control module
• High voltage cooling system might start leaking
• The coolant in the high voltage system might be low
• Water pump might not function properly