P0B12 OBD Error Code: Problem & Solutions

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Are there any symptoms for P0B12 error code? What is the diagnostic process? How the error code gets stored in the vehicle? Don’t worry. Here’s the solution. Malfunctioning of the battery current sensor is generally known as the hybrid battery pack current sensor "B" circuit intermittent/erratic. A current sensor is available in the high voltage battery pack which is fixed to the negative battery cable. The charging and discharging of the battery pack is informed to the battery control module by the sensor. The P0B12 error will be set in the vehicle if the battery control module identifies the malfunctioning of the sensor circuit.

The engine control module also shortly known as ECM will carefully look after the hybrid battery pack current sensor 'B' circuit. The error code will be set in the vehicle by the engine control module (ECM) if the signal of the hybrid battery pack current sensor 'B' circuit fails to meet the factory specifications as mentioned.

What causes this problem with the Hybrid Battery Pack Current Sensor "B" Circuit Intermittent /Erratic?

• The hybrid battery pack might be defective.
• There might be an opening in the hybrid battery pack or the circuit might be shorted.
• The electrical connection of the hybrid battery pack circuit might appear to be weak.

1. Hybrid Battery Pack - The damaged hybrid battery pack has to be replaced to avoid the P0B12 error code.
2. Hybrid Battery Pack Current Sensor - Get the replacement for your faulty hybrid battery pack current sensor from Parts Avatar at best prices online.
3. Battery Cables - Is the battery cable faulty? Get the replacement for your defective battery cables from Parts Avatar at an affordable cost online.
4. Battery Current Sensor - The faulty battery current sensor needs immediate fixation for the engine to run smoothly.
5. Battery Control Module - Is the battery control module damaged? Get the replacement for your damaged battery control module from Parts Avatar at the best prices online.
6. Engine Control Module - The right replacement for your faulty engine control module can be found at Parts Avatar at best prices.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0B12 code by mentioning some major symptoms below:

Common Symptoms 

• The warning light of the service engine or the engine light might be flashing.

Have a look at some ways with which you can correct the P0B12 code:

• The hybrid battery pack/ hybrid battery pack current sensor has to be changed.
• Replacing the faulty engine control module.
• Repairing the damaged battery cables and battery control module.

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 body control module, battery connectors, engine control module (ECM), BCM, power control module and a lot more. We are sure that now all your issues would be resolved.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0B12 code to be stored:

• Initially, the mechanic will use a scanner to check for the stored error codes.
• He will now connect a scanner to the diagnostic port of the vehicle and recover the stored codes and freeze frame data.
• These data are usually obtained as they can help him with further diagnostic process.
• Firstly the mechanic will check the hybrid battery pack as well as the hybrid battery pack current sensor. If there are any faults or defects, it will be repaired.
• If there are no errors, then the components like battery cables, battery control module, battery current sensor, etc will be visually checked and examined to see if there are any faults or stored error codes.
• If there are any errors, the mechanic will repair them immediately.
• As a final step, the mechanic will inspect the engine control module if it is broken or damaged. If it is broken, the mechanic will carry out the repair process.
• After every component is repaired and when the diagnosis process is properly done, the mechanic has to test drive your vehicle again see if the engine light turns on or if the error code still appears.
• This can help him to locate the area as to where the error has been stored in the vehicle.

Common Mistakes When Diagnosing the P0B12 Code

• Defective high voltage battery assembly.
• An issue with the battery current sensor.
• Faulty battery control module.