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P0B20 - OBD Trouble Code

OBD Code P0B20 - Hybrid Battery Pack Voltage Sense "D" Circuit Low

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Are you facing OBD error code P0B20? Wondering what it means? Well, don’t get tensed. We are here to help you out with this error code. OBD error code P0B20 is a generic powertrain code that applies to all OBD-II vehicles. It is referred to as hybrid battery pack voltage sense “D” circuit low. To know more about it refer to the sections below. 

Learn More About OBD Error Code P0B20

Your vehicle’s engine control module, also known as the ECM will set this error code when it detects that there is malfunctioning in the proper operations of the hybrid battery pack voltage sense. In other words it means that the vehicle’s ECM will set this OBD error code when it senses that the hybrid battery voltage sensor “D” circuit signals are not within the factory specifications.


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

  • Malfunctioning or damaged Hybrid Battery Pack
  • Open or shorted Hybrid Battery Pack harness
  • Poor electrical connections within the Hybrid Battery Pack circuit

Replace/Repair These Parts To Fix OBD Code P0B20

  1. Hybrid Battery Pack - If you are facing obd error code P0B20, then you will most probably need to fix and replace your hybrid battery pack at the earliest. Wondering where to find them? Well, nowhere else than PartsAvatar.
  2. Hybrid Battery Voltage Sensor - You can choose from a selection of hybrid battery voltage sensors on our website for your make model.
  3. Battery Energy Control Module - Chances are that if you are facing OBD error code P0B20, your vehicle’s battery energy control module is demanding a replacement. So why not replace them at the earliest?
  4. Battery Cable - if you are facing OBD error code P0B20 then it might demand a new battery cables if found faulty. If you wish to get it done at the earliest then you can simply browse through our website to find one for your make and model. We have in stock for you high end car batteries cables from top brands.
  5. Battery Contactor Assembly - Need to undergo battery contactor assembly replacement? Worried about the cost? Well, you no longer need to worry about that as we have for you best priced battery and parts in stock for you to correct this obd error code P0B20.
  6. Battery Control Module - if you need battery control module to correct your obd error code P0B20 then you can simply browse through our PartsAvatar website and get your hands on the best selection of parts available.
  7. Engine Control Module - The easiest way to get rid of the P0B20 error code is to replace the damaged engine control module as soon as possible.
  8. Powertrain Control Module - Chances are that if you are facing OBD error code P0B20, your vehicle’s PCM i.e. powertrain control module is itself damaged. So why not replace them at the earliest?

Symptoms Of OBD Error Code P0B20

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0B20 here:


Common Symptoms


  • Flashing of the check engine light
  • Non-functioning of the high voltage system
  • Compromised acceleration
  • Loss of engine vacuum

How To Correct P0B20 Hybrid Battery Pack Voltage Sense "D" Circuit Low

Here are some ways with the help of which you will be able to correct the OBD Code P0B20:


  • Firstly, you will need to repair or replace all the damaged or malfunctioning high voltage parts
  • Next, you will need to inspect for any loose or damaged cables and replace them with new ones.
  • Also, repair or replace the faulty engine control modules and car Pcm’s if found faulty
  • You might also need to undergo hybrid battery pack replacement

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high grade Hybrid Battery Pack, Hybrid Battery Voltage Sensor, Battery Energy Control Module, Battery Cable, Battery Connector Assembly, Battery Control Module, Engine Control Module, Powertrain Control Module and a lot more for our precious customers.

Easy Diagnosis Of Engine Error OBD Code P0B20

Here are some steps which you should follow in order to diagnose this P0B20 fault code:

Firstly, you will need to get a mechanic or a scan tool to detect all the codes stored in your vehicle’s powertrain control module. Check for the fault code and freeze the framed data.

Next, clear all the fault codes and conduct a road test to check for all the symptoms and conduct a visual inspection of the hybrid battery pack connectors and harnesses.

After that use a scan tool to check the hybrid battery pack circuit voltage readings to make sure that they are within the needed range. Next, you will also need to diagnose the wiring and powertrain control modules for any issue.


Common Mistakes When Diagnosing The P0B20 Code


Conducting a diagnosis is not as easy as it might seem, even the top notch mechanic can commit few errors. To avoid any of these misdiagnosis you need to follow the diagnostic steps with precision. Make sure you check each and every part related to OBD error code P0B20 to make sure you are diagnosing the problem effectively, and there occurs no misdiagnosis. There might occur the following errors

  • Failed battery contactor assembly
  • Failed battery energy control module, also known as BECM

Other Diagnostic Codes Related To OBD Code P0B20

P0B1E - Hybrid Battery Pack Voltage Sense "D" Circuit

P0B1F - Hybrid Battery Pack Voltage Sense "D" Circuit Range/Performance

P0B21 - Hybrid Battery Pack Voltage Sense "D" Circuit High

P0B22 - Hybrid Battery Pack Voltage Sense "D" Circuit Intermittent/Erratic