Error Code P0B45: What It Means & What To Do?

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Is the car’s Check Engine Light illuminated? Is the car engine stalling and sometimes not starting? Is there a loss of power and acceleration with affected fuel economy? Thus, there might be an issue with the hybrid battery and circuit indicating OBD code P0B45 error in the ECM/PCM.

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.

This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

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

• Hybrid battery pack issue
• Hybrid battery pack harness damaged
• Hybrid battery pack circuit and connection problem

1. Battery Current Sensor – Sometimes the current sensor can be faulty leading to OBD code P0B45 getting stored in the PCM. Buy new sensor immediately.
2. Car Battery – Check for weak and faulty battery and components and replace it now!
3. Battery Coolant Pump – Faulty coolant pump can also cause the OBD error code to occur and thus might need replacement. Buy new coolant pump now!
4. Engine Control Module – Faulty ECM can also cause the OBD code to get stored in the system and the vehicle can go into limp mode. Thus replace and reprogram it, if required.
5. Powertrain Control Module – It’s important to check for faults in the PCM and thus replace it as required. Buy from us now!
6. Hybrid Battery – Inspect the hybrid battery faults and thus replace it immediately if found so. Buy new battery from us.
7. Diagnostic Tool – Make use of quality OBD diagnostic tools to resolve these error. Explore now!
8. Starter Motor – If you are facing problem of engine stalling and not starting, consider checking for starter motor problems. Buy new motors now!
9. Car Battery & Cables – If the car battery has discharged and not charging and there’s a problem with the cables, replace them immediately. Buy new parts now!

Well, if you are looking to know about the common symptoms related to this error code P0B45, we are have worked out a small list to help you discover this error code with your vehicle.

Common Symptoms

• The Check Engine Light will be illuminated and the code is set in ECM memory
• The engine could stall or not start when failure is present
  
• The engine may have a misfire and may buck or jerk while driving for an intermittent connection
• The engine may not start or have low power if it does start

Here are some ways with the help of which you will be able to correct the OBD Code P0B45

• Replacing the faulty hybrid battery current sensor
• Replacing a broken wiring and connectors
• Repairing corroded connections to the battery
• PCM and ECU replacement

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0B45 code to be stored:

• A technician begins by hooking the vehicle to an OBD-II scanner to verify that the code is present, and check for other codes.
• The freeze frame data along with current data is recorded, and the codes are then cleared to see if they reoccur.
• Visual inspection of the wiring and connectors to check for loose connections, corrosion, or shorts is done.
• A specialized tool may be used to test the battery current sensor. Other tests of the hybrid battery and its components may help pinpoint the problem, as well as inspection of the wiring and connectors.
• Disconnect and check the resistance and signal voltage from the battery current sensor.
• If all the components check out, inspect for the fault in the PCM as it can sometime store wrong OBD code and thus might need replacement or reprogramming.

Common Mistakes When Diagnosing OBD Code P0B45

Most of the time the battery is immediately replaced without analysing the problem as per the OBD code error. Thus proper scan tools need to be used to check for the real cause of the problem that may be ECM, wiring issues, fuel system problems and many more parts other than the hybrid battery only. Thus proper evaluation and remedy is advisable.