P0BB4 OBD Error Code: Problem & Solutions

<<See All OBD Codes

The trouble code P0BB4 can be described as Hybrid Battery Voltage Sense “Y” Circuit Range/Performance. Several mini-batteries linked together make up the high voltage battery pack. The code P0BB4 is displayed by the high voltage control module whenever the high voltage control module notifies an error in the battery packs that are there in the high voltage battery assembly.

The hybrid/electric vehicle battery pack is made up of a total of 288 cells. All together there is a sum total of 96 cell groups in the hybrid/EV battery pack assembly (these cell groups are electrically connected). It should be noted that each and every individual cell group is ranked at 3.7 V for a nominal system voltage of 355 V direct current. Moreover, these battery cells are banded together and divided into three sections. The battery section one includes first 90 cells/30 cell groups. Situated near to the cowl, this section consists of batteries from 67 to 96. Next, the battery section two is located on the backside of the section one. Constituting cells from 72 to 24 cell groups and it also has batteries ranging from 43 to 66. The section number three is known as the transverse battery section, it constitutes of the rest of the 126 cells/42 cell groups and contains batteries from 1 to 42. All these three battery sections found can be easily serviced individually.

Apart from this, the battery energy control module measure and regulate the voltage of the 96 battery cell groups using the four hybrid/EV battery interface control modules. There are also voltage sense circuits that are connected to each of these individual cell groups. On the top surface area of the battery section, a connector is built where the voltage sense circuits terminate. Also located on the top surface of the battery section is a serviceable auxiliary battery wiring harness that connects this connector to a hybrid/EV battery interface control module. The decoding of the voltage reading is done by the hybrid/EV battery interface control module which is further transmitted to the battery energy control module via the battery control harness. The battery sections one and two has only one hybrid/EV battery interface control module while there are two hybrid/EV battery interface control modules linked with battery section three. The components that are serviceable include the hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module. The presence of a fault condition is detected by the battery energy control module. The diagnostics and system status are constantly transmitted from the battery energy control module to hybrid/EV powertrain control module 2 by the serial data. Also, the hybrid/EV powertrain control module 2 is considered to be the main controller for diagnostic trouble code information.

What causes this problem with the Hybrid Battery Voltage Sense “Y” Circuit Range/Performance?

• There can be distorted hybrid/electric vehicle battery pack
• There might be quirky hybrid/electric vehicle battery interface control module

1. Battery Temperature Sensor - Faulty temperature sensor will not be able to interpret the battery temperatures which can cause overheating and leakages inside the battery that can cause harm to various components and can be dangerous to driver’s safety also. Thus, replace it at first instance.
2. Battery Coolant Pump - Battery coolant pump plays a vital role in keeping the battery pack cool while operating and keeping it from overheating. Thus, check and replace faulty pump as it can be the reason for temperature sensor indicating out of bound readings.
3. Cooling System Parts - There can be many components in the cooling system that can be faulty, causing battery overheating and underperforming. So, replace the faulty components immediately.
4. 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!
5. 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.
6. 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.
7. Hybrid Battery - If the battery is at fault, it can also be the reason for battery overheating, which can lead to temperature sensor going out of specification. Buy new hybrid battery now!
8. Car Battery & Cables - Most of the time the battery cables and connectors are at fault for a particular component not functioning properly. Thus, the battery cable and connector should be checked for and replace in time.
9. 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!

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P0BB4. They are mentioned here as follows:

Common Symptoms

• Check engine light can start flashing up

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0BB4:

• Repair or replace the quirky hybrid/electric vehicle battery pack
• Rehabilitate the defaults in the hybrid/electric vehicle battery interface control module
• The malfunctioning PCM should be repaired or replaced as per the need

Now are you thinking that from where will you purchase these car parts? You have arrived at the right place. We at Parts Avatar care for our customers, that’s why we provide the best quality of battery control module, hybrid battery, pcm, ecm, ecu, pcm module and ecm module at marketable prices.

Do you wish to diagnose P0BB4 error code easily? Here are some steps which you should follow in order to diagnose this fault code:

• The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle.
• After performing a careful inspection, every of the stored codes and freeze frame data are retrieved as it can help down the way for further diagnosis process.
• Most often he has to inspect the hybrid battery itself to see if they are faulty or damaged. Additional error codes that are stored in the vehicle are also addressed.
• The mechanic performs a continuity test between the PCM and hybrid battery.
• If the Hybrid Battery Voltage Sense “Y” Circuit or other related parts are not faulty, he will then retune the code and test drive the vehicle.
• Now when the car is taken out for a test drive, if the P0BB4 code does not return soon, he will know that there is an existence of erratic condition.

Common Mistakes When Diagnosing The P0BB4 Code

• The high voltage battery connection might start failing
• Non observance of the high voltage battery assembly
• Some issues with the wiring