Error Code P0B77: What It Means & What To Do?

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Error code P0B77? Don’t have a fix? Well, we have got you covered. Often, this OBD-II code increased fuel consumption in most common terms is known the as a hybrid battery voltage sense "M" circuit. Plenty of mini-batteries connected together constitute the high voltage control module. Whenever there is an error detected by the high voltage control module within the battery packs that are present in the high voltage battery assembly, the error code P0B77 is stored by the high voltage control module.

Well, it can be observed that it is the of the hybrid/electric vehicle battery pack that it 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 "M" Circuit?

• A fault in the hybrid/electric vehicle battery pack
• A malfunctioning hybrid/electric vehicle battery interface control module

1. Hybrid battery - Well, a fault in the hybrid battery accompanies along a lot more issues related to the functionality of the engine, decreased MPG, strange noises and sudden drop in the battery bars. It is advised to get your hybrid battery repaired or replaced as soon as possible to avoid further complications related to the code PB077.
2. Hybrid battery pack - Check engine lights illuminated? Alarmed? Well, a lot more problems are triggered due to a malfunctioning hybrid battery pack. The malfunctioning of the internal combustion engine is likely to be experienced too. Don’t know where to look for? Parts Avatar is just the right place.
3. Hybrid battery voltage sensor - Decreased battery voltage is a sure shot after affect of a failure a in the hybrid battery voltage sensor. In addition to the driver may also observe an engine surging during operations. Well, we advise you to change your hybrid battery voltage sensor immediately. Tune into Parts Avatar now!
4. Battery cable - A faulty battery cables can lead to other dangerous problems, including fire in the system. Also malfunctioning negative cable can also cause errors in an alternator’s charging capability. So we advise you to change it just in time to avoid further errors.
5. Battery assembly - Whenever a battery assembly is severely corroded or broken, it triggers numerous problems including loss of electrical energy, short circuit in the battery and a slow engine crank. It is advised to get your battery assembly changed or replaced. Now you can get your error code P0B77 fixed easily with Parts Avatar. Tune in now!
6. Battery control module - A slow engine is one of the most common signs of a faulty battery control module. The other things to follow up behind quickly are no voltage and difficulty in getting the engine started. Get your error code PB077 corrected with the products available at Parts Avatar!
7. Powertrain control module - A defective pcm makes the system prone to many issues including a poorly running system, significant increase in the carbon emissions, stuttering, stalling or choking of the engine. It is recommended that the defective pcm should be replaced before it can cause any further damage to the system.
8. Exhaust system parts - The very first symptom of any error in the exhaust system parts is the burning smell arising from the engine. Issues in performance are also probable to arise due to any defects in the exhaust system manifold. Don’t know where to look for? Well, tune into Parts Avatar for the best products.

If you are facing OBD error code P0B77, 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

• Rising fuel consumption
• Engine light illuminated (or service engine soon warning light)

Learn the ways with which you can correct this trouble code:

• Replace or repair a malfunctioning hybrid/electric vehicle battery pack
• Mend or restore a defective hybrid/electric vehicle battery interface control module
• Also, a damaged engine control module should also be changed or repaired in time to avoid further problems
• A broken or unsound hybrid battery voltage sensor should be changed or repaired as soon as possible
• Measures should be taken to fix faulty exhaust system parts immediately

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 P0B77? Well, then you should follow these steps in order to diagnose this fault code:

To start with the diagnosis procedure, make use of a standardized 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 P0B77

Here we have listed a few common mistakes that should be avoided while performing the procedure:

• A defective high voltage battery connection
• A damaged high voltage battery assembly failure
• Wiring error