P0B78 OBD Error Code: Problem & Solutions

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Anxious about the constant reappearance of the OBD Error Code P045B? No worries! Just fasten your seatbelts and get ready to ride with us. This generic powertrain OBD-II code increased fuel consumption is often determined as a hybrid battery voltage sense "M" circuit range/performance. The high battery voltage pack is made up of a lot of mini-batteries connected together. At anytime when the high voltage control module detects an error with more than one battery packs that from the high voltage battery assembly, the code P0B78 is stored by the high voltage control module.

It is notable that all together 288 cells form the hybrid/electric vehicle battery pack with groups of three cells connected parallelly together. All together there is a total of 96 cell groups in the hybrid/EV battery pack assembly (these cell groups are electrically connected in order). It should be noted that each and every individual cell group is rated at 3.7 V for a nominal system voltage of 355 V direct current. Also, these battery cells are tied together and divided into three sections. The battery section one includes first 90 cells/30 cell groups. Located close to the cowl, this section consists of batteries from 67 to 96. Moreover, the battery section two is located on the backside of the section one. Composed of 72 cells/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 the information stated above, the battery energy control module also controls the voltage of the 96 battery cell groups using the four hybrid/EV battery interface control modules. One can observe voltage sense circuits that are connected to each of these individual cell groups. On the topmost periphery of the battery section, a connector can be seen built where the voltage sense circuits also 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 can be serviced easy 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 "M" Circuit Range/Performance?

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

1. 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.
2. Hybrid battery pack - Blinking of all the dashboard lights including the check engine light and triangle caution light, the frequent running of the engine, instead of the normal switching of both ICE and electric motors are some of the problems that are likely to follow a fault in the hybrid battery pack. Gte your error code P0B78 fixed ASAP with Parts Avatar.
3. Hybrid battery voltage sensor - See the error code P0B78? Don’t know the reason behind it? Well, it could be due to a damaged hybrid battery voltage sensor. In addition to this the driver is most probably will experience a fall in the overall functionality of the battery too. So in order to avoid this we recommend you to change yours now from Parts Avatar.
4. Battery cable - Crumbling battery cables that turn into black as coal are harmful for the system. They also hold a possibility of damaging the entire battery and other electrical components located in its close proximity. Now get your error code P0B78 fixed with us.
5. Battery assembly - A complete loss of electrical power, visible corrosion and problems starting the vehicle are quite commonly followed by a failure in the battery assembly. Repair or replace now.
6. Battery control module - Having problems with the Battery control module? Don’t you worry, Parts Avatar has it all. A damaged battery control module could end up being the root cause behind the error code P0B78. A slow engine crank, no voltage, difficulty in starting the vehicle is likely to follow as soon as the battery control module is found to be at fault.
7. Powertrain control module - A failing powertrain control module can disrupt the functions of many components along with the engine. As it also monitors the fuel mixture, it is also in charge of the exhaust emission. All this is at stake if the PCM malfunctions. Tune into Parts Avatar for the best quality products offered at budget friendly prices.
8. Exhaust system parts - Performance issues are a common symptom of a problematic exhaust system parts. A leak or crack often lead to the vehicle to experience a reduction in power, ability to accelerate, and fuel efficiency due to the loss of back pressure. Now get your error code fixed with new exhaust system parts delivered right at your doorstep. Log in now!
9. Battery smart unit - A distorted battery smart unit can end up being the chief host inviting the error code P0B78. So replacing one can be one of the wisest decisions to avoid a problematic system. Also, in order to avoid a malfunctioning battery, a sluggish engine crank we advise you to replace or repair your battery smart unit.

For us our customers are everything, and that’s why we will help you to diagnose P0B78 code by mentioning some important symptoms below:

Common Symptoms

• Increasing fuel consumption
• The engine light observed to on (or service engine soon warning light)

It is very important to fix the fault code P0B78. So here are some ways with which you can correct this issue:

• A damaged hybrid/electric vehicle battery pack should be changed or repaired
• A defective hybrid/electric vehicle battery interface control module should be replaced or repaired too
• Immediate measures should be taken to fix damaged exhaust system parts
• Repair or replace a malfunctioning engine control module
• Amendments should be performed to repair or replace a defective battery control module
• If the exhaust system parts are diagnosed to be faulty, make sure you replace or repair them just in time to avoid problems caused by the error code P0B78

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 battery, hybrid battery pack, hybrid battery voltage sensor, battery cable, battery assembly, battery control module, powertrain control module, battery connection, exhaust leak, battery smart unit, mass air flow sensor, ecm module, pcm module, brake control module, automatic transmission module, control module, body control module and many more. Now all your problems would vanish within no time.

Want to diagnose the error code P0B78? Well, then you should follow these steps in order to diagnose this fault code:

To begin an accurate diagnosis, make use of a revised OBD-II trouble code scanner. The scanner should be utilized to check and confirm the code and view the freeze frame data by a qualified mechanic. The mechanic should also check for additional trouble codes stored. After the repairs have been performed, the codes should be cleared and the vehicle should be test driven to see if the code reappears. If the code disappears it could likely be due to a faulty diagnose or may signify an intermittent issue.

Common mistakes when diagnosing the P0B78

Fearing a fault? Well, only for you we have listed here a few common mistakes that should be taken care of while diagnosing the error code P0B78:

• A malfunctioning high voltage battery connection
• A distorted high voltage battery assembly
• Complications with the wiring