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Error Code P0B8B: What It Means & What To Do?

OBD Code P0B8B - Hybrid Battery Voltage Sense "Q" Circuit

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The trouble code P0B8B can be explained as Hybrid Battery Voltage Sense "Q" Circuit. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile. One thing which you must keep in mind that its symptoms as well as causes would surely vary as it depends upon a number of things.

Learn More About OBD Error Code P0B8B

Do you want to know more about the P0B8B fault code? Don’t worry! Parts Avatar Canada is here at your service. The voltage of the 96 battery cell groups is monitored by the battery energy control module through the four hybrid/EV battery interface control modules. The voltage sense circuits are joined with every specific cell group, and then the sense circuits would terminate at a connector which is situated on the top surface of the battery section.


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


  • Some issues related to the hybrid/electric vehicle battery pack
  • There can be distorted hybrid/electric vehicle battery interface control module

Replace/Repair These Parts To Fix Code P0B8B

  1. Powertrain Control Module - A faulty Powertrain Control Module can be troublesome. You can always rely on us as we have best auto parts for our customers.
  2. Car Battery - If everything is alright with PCM, then there is surely some defect in Car Battery. Get it replaced before the situation gets worse.
  3. Exhaust Manifold - P0B8B code can display due to some issues in the Exhaust Manifold. So it is very important to replace the Exhaust Manifold with us at equitable prices.
  4. Hybrid Battery - Do you remember when was the last time you got your car Hybrid Battery checked up? A dirty Hybrid Battery can cause a lot of issues like displaying P0B8B code.
  5. Engine Control Module - Are there some faults in your Engine Control Module? Don’t waste time and get them replaced or else P0B8B code can turn up.
  6. Car Exhaust System Parts - Everything is fine with Engine Control Module and still P0B8B code triggering? Then you must get your Car Exhaust System Parts checked.

Symptoms Of The OBD Error Code P0B8B

There could be countless symptoms which that would accompany with this fault code. Willing to know some common symptoms of OBD Trouble Code P0B8B? Your wish is our demand. Have a look at them below:


Common Symptoms


  • Appearance of the service engine soon light
  • Growth in the fuel consumption

How To Correct P0B8B Hybrid Battery Voltage Sense "Q" Circuit Issue

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:


  • Make sure to mend the faulty hybrid/electric vehicle battery pack
  • It is essential to restore the flawed engine control module
  • Repair or replace the quirky hybrid/electric vehicle battery interface control module
  • Carefully adjust the faults in the hybrid battery
  • It is necessary to perform proper service of the unsound exhaust manifold

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of car muffler, performance exhaust systems, custom exhaust and a lot more. We are sure that now all your issues would be resolved.

Easy Diagnosis Of Engine Error OBD Code P0B8B

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0B8B code to be stored:


  • A careful inspection of the vehicle is carried out by the mechanic with the help of a scanner.
  • After this inspection, he will recover every stored codes in the vehicle as well as freeze frame data by inserting a scanner to the diagnostic port of the vehicle.
  • He will store this information as it may help him with further diagnosis.
  • After the codes are recovered, the vehicle is reset, test- driven to check for the occurrence of the error code.
  • He will clearly know that an erratic condition has prevailed if the code does not return quickly.
  • But if the code returns instantly, he will then start inspecting the car battery for any defaults.
  • In some cases, there can be faulty hybrid battery.
  • The area of damaged will be found and fixed. The faulty hybrid battery should be replaced.
  • Sometimes, the car battery cable itself can be defective which has to be checked for any damages.
  • After this, the technician will visually inspect every wires, connectors, hybrid battery and car battery cable for any possible damages or defective and repairs them as needed.
  • You must always know that once the error code is repaired, it is always the best idea to test drive and check the vehicle if the error code appears again which can help the technician to know the area of fault and as to how the error code occurred in the vehicle.
  • This can easily help the mechanic to fix the error code.


Common Mistakes When Diagnosing The P0B8B Code


  • Malfunctioning high voltage battery connection
  • There can be a failure in the high voltage battery assembly
  • Wiring problems

Other Diagnostic Codes Related To OBD Code P0B8B

P0B8C - Hybrid Battery Voltage Sense "Q" Circuit Range/Performance

P0B8D - Hybrid Battery Voltage Sense "Q" Circuit Low

P0B8E - Hybrid Battery Voltage Sense "Q" Circuit High

P0B8F - Hybrid Battery Voltage Sense "Q" Circuit Intermittent/Erratic