P0BC0 OBD Error Code: Problem & Solutions

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The OBD code P0BC0 can be defined as Hybrid Battery Pack Cooling Fan Supply Voltage Circuit Low Issue. If the powertrain control module detects a variation in the maximum battery charging capacity set by the automobile manufacturer and the supply voltage to the cooling fan, then it flashes OBD code P0BC0 in the system. This can cause vehicle going into limp mode and check engine light getting illuminated.

The PCM is responsible for charging the hybrid battery pack and when it notices that the cooling fan supply voltage is lower than the required value, the PCM sets the OBD code P0BC0. It is important to understand that the vehicle battery can overcharge/undercharge, which can cause damage to various components and thus, must be diagnosed with utmost care.

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

• ECU power management control faulty
• ECU power management control having open or short harness
• Damaged or corroded wiring and connectors to the ECU
• Hybrid battery cooling fan damaged
• Cooling fan wiring and harness faulty

1. 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.
2. 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 damage to various parts of the car.
3. Engine Control Module - It is not always the components, but the ECM that can also be faulty. It can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
4. Powertrain Control Module - Powertrain Control Module can also be faulty in rare cases and thus needs through checks for system and software errors. Thus, check and replace it, if required.
5. Diagnostic Tools - It is always advisable to use the correct tools and equipment while resolving any OBD code issue as even small mistakes can lead to wrong diagnosis. Thus, always take help from a professional who has the knowledge and experience to such tools in an efficient manner. Buy new quality diagnostic tools from us today!
6. Cooling Fan - If the cooling fan is not working properly, the battery may overheat and can lead to performance issues. Thus, replace it immediately.

Willing to know some common symptoms of OBD Code P0BC0? Your wish is our demand. Have a look at them below:

Common Symptoms

• Check Engine Light On
• Engine may not operate under low voltage

Have a look at some ways with which you can correct the P0BC0 code:

• ECU replacement and reprogramming
• ECU harness and wiring replacement
• Hybrid battery replacement
• Repair and reprogram faulty PCM
• Cooling fan replacement

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of Hybrid battery, Cooling Fan, Cooling Fan Harness, Hybrid Battery Harness and a lot more. We are sure that now all your issues would be resolved.

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

• The mechanic will use an OBD scanner, to inspect the error codes in the vehicle.
• By connecting a scanner to the diagnostic port of the vehicle, the mechanic or the technician can easily recover every of the stored codes and freeze frame data.
• Record this information, as it can be helpful for further diagnosis.
• At times, the ECU solenoid, fuse and harness itself can cause issue if it is damaged or broken.
• Once you carefully inspect every component, you have to reset the code. Once it is reset, test drive your vehicle to see if the codes reappear.
• If the error does not return quickly, then there can be an intermittent connection in the vehicle.
• It is important to check for the ECU power management control module problems that might be giving wrong data thus, leading to inappropriate functioning. Thus, replace the faulty module immediately.
• Also check for hybrid battery related issues and replace the faulty component. Also check for problems that might arise due to leakages and also due to battery overcharging or undercharging.
• If everything seems correct, then check the ECU and PCM for the faults and replace and reprogram as required.

Common Mistakes When Diagnosing the P0BC0 Code

The most common mistake while diagnosing this code is missing out on diagnosing steps which further leads to the expensive and unnecessary replacements. It is always recommended to seek the help of experienced diagnostician to avoid any mistakes.

• Malfunctioning hybrid transaxle assembly
• ECU power management module wiring related issues
• There can be a failure in the powertrain control module