Error Code P0B9F: What It Means & What To Do?

<<See All OBD Codes

Only for our customers we have written down here all that you need to know for diagnosing this error code P0B9F. This OBD-II code increased fuel consumption is commonly referred to as a hybrid battery voltage sense "U" circuit. A lot of mini-batteries connect together to form the high voltage battery pack. Whenever the high voltage control module detects a fault in more than battery packs that constitute the high voltage battery assembly, it stores the error code P0B9F.

For further information, you should note that the hybrid/electric vehicle battery pack incorporates a total of 288 cells. The arrangement is of three cells each that are all fused together in parallely. 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 these battery cells are divided. The battery section one is composed of first 90 cells/30 cell groups. This section can be located near to the cowl. It consists of batteries starting from 67 to 96. You can find the battery section two at the back of the section one. Containing 72 cells/24 cell groups the batteries present range 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 can be serviced individually. In addition to that, the battery energy control module performs the essential function of controlling and regulating the voltage of the 96 battery cell groups utilizing the four hybrid/EV battery interface control modules. These voltage sense circuits are all paired to each and every 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 (that is also mounted on the top surface of the battery section). The hybrid/EV battery interface control module performs the encoding for 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 rest of the two hybrid/EV battery interface control modules are connected with battery section three. All the components including 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.

A malfunction 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. All the diagnostic trouble code information is stored in the hybrid/EV powertrain control module 2.

What causes this problem with the Hybrid Battery Voltage Sense "U" Circuit?

• A defect in the hybrid/electric vehicle battery pack
• Failed hybrid/electric vehicle battery interface control module

1. Hybrid Vehicle Battery Pack - Suddenly observing engine glitches? Then this is indicative of a damage in the hybrid vehicle battery pack. Change or repair it now!
2. Hybrid Vehicle Battery Interface Control Module - Now you can get rid of the error code P0B9F immediately by simply repairing or replacing your hybrid vehicle battery interface control module. Visit us to get your hands on some of our exciting deals!
3. Powertrain Control Module - Problem in starting the car? Love travelling? Engine stalling? Don’t know the reason behind it all? Well, it is likely to be caused due to damaged powertrain control module. Log into Parts Avatar for top notch PCMs available at just the right prices.
4. Engine Control Module - Issues with the engine control module? See the error code P0B9F displaying? Then it could be due to a failure in the engine control module. So to avoid expensive after repairs, it is recommended to get your engine control module changed as soon as possible.

If you are facing OBD error code P0B9F, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better.

Common Symptoms

• The check engine light will illuminate immediately

It is very important to fix the fault code P0B9F. So here are some ways with which you can correct this issue:

• Mend or restore a failed hybrid/electric vehicle battery pack
• It is important to repair or replace a defective hybrid/electric vehicle battery interface control module

However, if you face any issue then we have stocked a wide range of best priced hybrid vehicle battery pack, hybrid vehicle battery interface control module and more to help you out in fixing your car.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

For the gasket to fail, a multiple symptom can be observed as one reason can solely not cause a failure in the gasket. We recommend you to make lesser use of the vehicle when you notice these symptoms. According to the symptoms exhibited, repair or replace the gasket. The costing for replacement generally differs from technician to technician. Restoring the gasket is quite an expensive affair because of its peculiar location and labor requirement. This code mainly occurs in vehicles that have electronically controlled automatic transmissions. The 3-4 shift solenoid actuates the hydraulic circuits for further activating the clutches or bands that change gears inside the automatic transmission.

Common Mistakes When Diagnosing the P0B9F Code

Here we have listed only for you all the common mistakes that should be avoided:

• Malfunctioning high voltage battery connection
• Corroded high voltage battery assembly
• Wiring is damaged