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Guide To P0BC1 OBD Error Code Solutions

OBD Code P0BC1 - Hybrid Battery Pack Cooling Fan Supply Voltage Circuit High

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The hybrid battery inverter cooling system issue revolves around the problem of keeping the battery under normal working conditions and temperatures. Thus, when the power management module detects any performance issues with the cooling system, OBD code P0BC1 will get stored in the system and the vehicle can go into fail safe mode.

Learn More About OBD Error Code P0BC1

It is important to maintain correct operating pressure for the hybrid battery to work with its maximum potential. The hybrid battery inverter cooling system comes into play for this function ad when the PCM detect any problem with the cooling fan voltage output, the OBD code will be stored in the system.


What causes this problem with the Hybrid Battery Pack Cooling Fan Supply Voltage Circuit High?


  • Hybrid battery cooling system faulty
  • Cooling fan wiring and connector issues
  • Poor electrical connections to cooling system
  • ECU power management module failure

Replace/Repair These Parts To Fix OBD Code P0BC1

  1. Hybrid Drive Cooling Pump - The cooling pump play a major role in keeping the battery temperatures under control and ensuring proper functioning. If the pump gets damaged, it can lead to increased temperatures that can hamper many starting and charging parts. Thus, replace it immediately, if found damaged.
  2. Inverter Cooler Pump - The inverter cooler pump maintains a cool environment for the hybrid battery to operate properly. Without the cooler pump working properly, the battery might overheat and malfunction. Thus, if the inverter cooler pump is not working properly, inspect for damages and replace it now!
  3. Engine Control Module - ECM faults are rare but can be a big problem as faulty ECM will cause wrong vehicle operations and can also result in wrong OBD codes getting stored in the system which can also cause misdiagnosis. Thus, replace faulty ECM components now!
  4. Powertrain Control Module - Check for PCM error which might be due to circuit faults that might require complete replacement and reprogramming. Replace it now!
  5. Diagnostic Tools - Buy quality diagnostic tools to check and diagnose OBD code P0BC1 error with the help of experienced mechanic. Visit us today!
  6. Cooling Fan - Faulty cooling fan operations will lead to erratic performance by the hybrid battery and may even lead to serious breakdowns. Thus, replace faulty components in time.

Symptoms Of OBD Error Code P0BC1

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0BC1 code by mentioning some major symptoms below:


Common Symptoms


  • Check Engine Light illumination
  • High voltage system may not work properly
  • High voltage system may overheat

How To Correct P0BC1 Hybrid Battery Pack Cooling Fan Supply Voltage Circuit High

It is very important to fix the fault code P0BC1. So here are some ways with which you can correct this issue:


  • Inverter cooler pump replacement
  • Hybrid drive cooler pump replacement
  • Faulty cooling fan replacement
  • Faulty wiring and connector replacement
  • Correction of ECU and PCM faults

However, if you face any issue then we have stocked a wide range of best priced Hybrid battery, Cooling Fan, Cooling Fan Harness, Hybrid Battery Harness and more to help you out in fixing your car.

Easy Diagnosis Of Engine Error OBD Code P0BC1

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


  • The error code P0BC1 can be diagnosed using an OBD-II trouble code scanner.
  • This scanner should be utilized in order to store the freeze frame data to collect the details of this error code P0BC1 by a certified mechanic.
  • The mechanic should also check and confirm the presence of any additional codes.
  • Now, if there are a number of codes, they should be aligned in order. It is essential to treat the codes in the order they have been stored in.
  • After all the repairs have been performed, it is recommended to clear the codes and reset the system to observe if the code persists.
  • If the code fails to reappear, it was likely due to an intermittent issue or was triggered falsely.
  • Check for the inverter cooling pump problems that might be physically damaged, thus leading to inappropriate functioning. Thus, replace the faulty parts immediately.
  • Inspect for power management system related issues and replace the faulty system component. Also check for coolant pump issue that might be due to leakages thus causing problematic battery performance.
  • Don’t forget to check for damaged wiring and connectors in association with various components. It is advisable to replace it, if necessary.
  • Next, check the ECU and PCM for the faults and replace and reprogram as required. Although, this problem is rare, but must be properly checked and repaired as required.

Common Mistakes When Diagnosing the P0BC1 Code


  • Quirks in the powertrain control module
  • Hybrid motor assembly might start failing
  • Inverter cooling system leakage problem
  • Coolant water pump issues
  • Wiring and connector related issues

Other Diagnostic Codes Related To OBD Code P0BC1

P0BBF - Hybrid Battery Pack Cooling Fan Supply Voltage Circuit/Open

P0BC1 - Hybrid Battery Pack Cooling Fan Supply Voltage Circuit High