Guide To P0B43 OBD Error Code Solutions

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Is your car engine not starting again? Do you notice increased fuel consumption over recent period of time? And is your car engine performance degrading? If all this is true, then there might be a problem with Hybrid Battery voltage indicating the OBD Code P0B43 error.

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

The Powertrain Control Module (ECM) monitors the Hybrid Battery Voltage Sense 'B' Circuit High and PCM sets the error when the circuit signal is out of specifications. The high voltage battery is composed of many individual battery cells which are monitored to make sure they are all contributing equally to the high voltage system. When any specific cell is not able to produce enough voltage, OBD code P0B43 gets stored and flashed in the system.

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

• Broken Hybrid Battery Pack
• The Battery Current Sensor might not be functioning properly
• Defective wiring and connectors in relation to the batteries
• Quirky Powertrain Control Module

1. Battery Current Sensor – Inspect for faulty battery current sensor and replace the damaged parts immediately. Buy new sensor now!
2. Car Battery – The car might not even start, if the battery in down or not functioning properly. Thus, replace it now!
3. Battery Coolant Pump – Coolant pump related problems can also lead to this OBD code flashing in the system. Buy new battery coolant pump from us.
4. Engine Control Module – Check for ECM faults and replace the faulty components now!
5. Powertrain Control Module – This OBD code can also flash when the PCM itself is faulty and can even flash wrong OBD code. Thus, buy new PCM components from us today!
6. Hybrid Battery – Faulty hybrid battery is the first reason for this code to get stored in the PCM. Thus, check and replace faulty parts immediately.
7. Electronic Control Unit - Are there some faults in your Electronic Control Unit? Don’t waste time and get them replaced or else P0B43 code can turn up.
8. Diagnostic Tool - Choose from our diagnostic tools collection that will come handy to detect and correct the OBD error code.
9. Starter Motor – If the starter motor is not functioning properly, it has to be replaced as it will lead to engine misfires and not starting. Buy new starter motor now
10. Car Battery & Cables – Broken cables and leaky batteries should be replaced immediately and it will directly hamper the functioning of various car parts. Replace faulty cables and battery now!

Next important thing you need to know about are the common symptoms for this OBD error code P0B43 with your fuel volume control.

Common Symptoms

• Engine stalling and not starting
• Reduced acceleration
• Affected fuel consumption
• Car lighting not working and dimming
• PCM failures
• Check Engine Light Indication

Once you know the symptoms of your vehicle’s problem, it becomes easy to detect it and get started with solving it. So, next on our list is few common steps to correct this issue with your vehicle.

• Affected hybrid battery cut off switch harness replacement
• Battery current sensor repair or replacement
• Repair or replace the quirky car battery
• Mending the wiring and connection to the hybrid battery connectors

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After verifying the P0B43 code with an OBD-II scanner, the mechanic should begin with a visual inspection of all electrical components, especially looking for leaking fluid that could have caused shorts or corrosion.

Any issues should be repaired, and the code should be cleared from the system. If the code reappears after a retest, the mechanic should then move on to performing voltage tests and resistance tests on the sensor, and comparing the information to the manufacturer’s specifications.

If the readings are within the correct limits, then the sensor needs to be replaced. However, if the readings are not within the correct limits, then the issue lies elsewhere.

The mechanic should continue checking each possible cause, clearing the code and retesting the system after each attempt, to be sure that the correct solution is found.

Common mistakes when diagnosing the P0B43 code

Most of the time we tend to diagnose the problem without completely identifying the real cause of it. It is important to follow all the diagnostic steps and examine each component carefully before correcting. Some of the components to be focused on are listed below;

• Damaged battery current sensor
• Cam sensor circuit failure
• Hybrid battery failure
• Powertrain Control Module (PCM) failure
• Hybrid battery wiring/harness and connector issue