P0B9C OBD Error Code: Problem & Solutions

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We have written down here all that you need to know about the error code P0B9C. This generic OBD-II code increased fuel consumption is described as a hybrid battery voltage sense "T" circuit low. A large number of mini-batteries linked together form the high voltage battery pack. The high voltage control module identifies the malfunction with more than one battery packs that constitute the high voltage battery assembly and stores the error code P0B9C.

It is notable that the hybrid/electric vehicle battery pack has 96 cells in it. There are sets of three cells fused together parallelly. In totality, 96 cell groups are present in the hybrid/EV battery pack assembly. All of these cell groups are connected using an electrical connection in-series. A single cell group is rated at 3.7 V for a nominal system voltage of 355 V direct current. Further, these battery cells are sectioned equally into three parts. The battery section one includes the first 90 cells/30 cell groups. You can situate this section close to the cowl. It consists of batteries from 67 to 96. In front of the battery section two is the section one. Composed of 72 cells/24 cell groups, it comprises of batteries ranging from 43 to 66. The transverse battery section is named as the battery section three. This section contains of the rest of the 126 cells/42 cell groups and batteries ranging from 1 to 42. All the three battery sections are separately serviceable parts.

Also, the function of monitoring the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules is performed by the battery energy control module. The voltage sense circuits can be seen connected to each individual cell group. At a connector situated on the top surface area of the battery section, one can see these voltage sense circuits terminating. An auxiliary battery wiring harness that you can service individually is utilized to connect this connector to a hybrid/EV battery interface control module. This can be found on the top surface of the battery section. The hybrid/EV battery interface control module plays the role of encoding the voltage reading and transmitting it to the battery energy control module via battery control harness. In all, there is one hybrid/EV battery interface control module placed on the battery sections one and two while there are two hybrid/EV battery interface control modules connected to the battery section three. The parts that are valid for servicing include the hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module.

The battery energy control module from time to time updates whenever there is a fault present. Through the serial data, the diagnostics and system status are transferred from the battery energy control module to hybrid/EV powertrain control module 2. The hybrid/EV powertrain control module 2 is considered to be the chief controller for all the diagnostic trouble code information.

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

• Distorted hybrid/electric vehicle battery pack
• A defective hybrid/electric vehicle battery interface control module

1. Hybrid Vehicle Battery Pack - Observing a difficulty in starting the vehicle? Well, most probably it is caused due to a malfunction in the hybrid vehicle battery pack. We advise you to get your hybrid vehicle battery pack restored or repaired immediately.
2. Hybrid Vehicle Battery Interface Control Module - Having problems with the hybrid vehicle battery interface control module? Then this is likely to hamper the overall drivability of the vehicle. Change or repair it now immediately.
3. Powertrain Control Module - Jammed PCM? Suddenly noticing performance issues? Check engine light flashing? Don’t worry, the solution to all your problem simply lies in changing the powertrain control module. Log into Parts Avatar now!
4. Engine Control Module - Unsound or a failure in the engine control module may display symptoms such as engine stalling or misfiring and engine performance issues. One of the major indications of a failing ECM will be the illumination of check engine light and poor fuel economy too. So, repair or replace it now before it too late.

Willing to know some common symptoms of OBD code P0B9C? Your wish is our demand. Have a look at them below:

Common Symptoms

• The check engine light illuminates immediately

We have listed out some ways which would help you to correct the occurrence of OBD code P02BC. They are mentioned here as follows:

• Mend or restore a damaged hybrid/electric vehicle battery pack
• A defective hybrid/electric vehicle battery interface control module should be repaired or replaced as soon as possible

There is no need to get strained if your OBD code is still flashing up as we are here at your service. Have a look at our superior variety of hybrid vehicle battery pack, hybrid vehicle battery interface control module and many more. Now all your problems would vanish within no time.

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

It should be noted that white smoke indicates that the fuel that has been injected into the combustion chamber isn’t burnt as per the needs. Generally, the causes that generate white smoke can be from something as simple as a low engine compression or water in the fuel to the fuel pump timing being thrown off (something keeping the fuel away from getting to the pump in the required manner). A number of reasons including a contaminated MAF sensor that might be leading the car to overcompensate in its fuel-trim adjustments stimulate the error code P0B9C. Consequently, the oxygen sensors register fuel mixture problems too.

Common Mistakes When Diagnosing the P0B9C Code

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

• A failed high voltage battery connection
• Faulty high voltage battery assembly
• Wiring issues in the system