Guide To P0BB1 OBD Error Code Solutions

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The trouble code P0BB1 can be explicated as Hybrid Battery Voltage Sense “X” Circuit High. The hybrid/electric vehicle battery pack incorporates in itself a total of 288 cells. There is an arrangement of three cells each that are all fused together in regularity. Apart from this, in the hybrid/EV battery pack assembly there are a total of 96 cell groups. All these cell groups are attached through an electrical connection that is in-series. The individual cell group can be seen to be rated at 3.7 V for a nominal system voltage of 355 V direct current. In three equal sections, the battery cells are divided. The battery section one can be seen being composed of first 90 cells/30 cell groups. This section can be located near to the cowl. It consists of batteries within 67 to 96. The battery section two can be found at the back of the section one. Containing 72 cells/24 cell groups the batteries present span from 43 to 66. The section number three is known as the transverse battery section. The remaining 126 cells/42 cell groups and batteries from 1 to 42 make up the section three. These three battery sections are valid for individual service.

In addition to that, the battery energy control module from time to time controls and regulates the voltage of the 96 battery cell groups utilizing the four hybrid/EV battery interface control modules. These voltage sense circuits are all teamed to each individual cell group. All these sense circuits end at a connector that can be observed on the top surface area of the battery section. A serviceable auxiliary battery wiring harness plays the role of connecting this connector to a hybrid/EV battery interface control module (also located on the top surface of the battery section). The hybrid/EV battery interface control module performs the essential function of encoding the voltage reading and further transferring it to the battery energy control module by the battery control harness. There is one hybrid/EV battery interface control module positioned over the battery sections one and two, while the rest of the two hybrid/EV battery interface control modules are connected with battery section three. All the components namely the hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module can be individually serviced.

Whenever there is a malfunction, it is detected by the battery energy control module. All the diagnostics and system status present are regularly updated from the battery energy control module to hybrid/EV powertrain control module 2 using the serial data. Also, all the diagnostic trouble code information is stored and saved in the hybrid/EV powertrain control module 2. The high battery voltage pack is made up of a lot of mini-batteries connected together. If the high voltage control module detects an error with more than one battery packs that from the high voltage battery assembly, the code P0BB1 is stored by the high voltage control module.

What causes this problem with the Hybrid Battery Voltage Sense “X” Circuit High?

• Hybrid/electric vehicle battery pack might be flawed
• Malfunctioning hybrid/electric vehicle battery interface control module

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. Hybrid Battery - A failing hybrid battery can be disastrous for the system. It triggers a whole lot of issues related to MPG, the state of charge, sudden drop in battery bars etc. So, in order to avoid them we advise you to change your hybrid battery as soon as possible. Tune into Parts Avatar.
4. Engine Control Module - ECM failures and faults can be very difficult to find and resolve as these are very rare and might require a complete reprogramming of the system to avoid wrong codes from getting stored in the system, leading to misdiagnosis. Replace it now!
5. Powertrain Control Module - Faulty PCM can disrupt the normal functioning of the vehicle by affecting the transmission system and the fuel delivery system. This will cause the system to store wrong OBD error and thus can lead to misdiagnosis.
6. Diagnostic Tools - Take help of a professional mechanic to diagnose OBD code error. Use high grade diagnostic tools to resolve this issue. Buy new tools and equipment form us!

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 P0BB1 here:

Common Symptoms

• Check engine light might come into signal

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:

• The flawed hybrid/electric vehicle battery pack should be restored properly
• Rehabilitate the defaults in the hybrid/electric vehicle battery interface control module
• The ECM/PCM should be restored to working order

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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 Voltage Sense “V” Circuit.
• If the Hybrid Battery Voltage Sense “X” Circuit is defective, then it has to be replaced.
• Also, the mechanic can check for any sign of defects in the related parts, then he should 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.
• In most cases, this error code can arise mostly because of any shorted wires or faults in the Hybrid Battery Voltage Sense “X” Circuit.
• 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 P0BB1 Code

• There can be some issues in the high voltage battery connection
• Failure in the high voltage battery assembly
• Wiring related issues