P0B44 - OBD Trouble Code

If a voltage difference between the battery blocks exceeds the standard readings, the battery smart unit determines that malfunction has occurred and the OBD P0B44 occurs. Thus, the Powertrain Control Module will illuminate the Malfunction Indicator Lamp (MIL) and set a Diagnostic Trouble Code (DTC) in the system thus leading to vehicle going into limp mode.

What causes this problem with the Hybrid Battery Voltage Sense 'B' Circuit Intermittent/Erratic?

• Faulty hybrid battery sensor or circuit
• Problem with hybrid battery current sensor and circuit
• Damaged/corroded wiring and connectors
• Weak car battery
• PCM/ECM failure

1. Battery Current Sensor - There can be a case where the battery current sensor is not working properly and is unable to detect any reading. Thus, replace faulty components now!
2. Car Battery - The car battery can also be weak or faulty and thus might need replacement. Thus, replace it now!
3. Battery Coolant Pump - If the coolant pump doesn’t function properly, the battery will not work efficiently. Thus, check and replace as required.
4. Engine Control Module - If the ECM is faulty, the system might not detect the problem at all and might even detect and store wrong OBD error code leading to misdiagnosis. Buy new ECM component now!
5. Powertrain Control Module - Always check for the PCM faults and it might be storing wrong codes or not interpreting the data at all. Thus, replace it in time.
6. Hybrid Battery - The prime reason for OBD code P0B44 getting stored in the system is damaged or faulty hybrid battery. Replace it now!
7. Diagnostic Tool - In order to fix these errors, you need few diagnostic tools to get your car problems pointed out easily. Our diagnostic tools collection will come handy to do so and resolve all your vehicle problems. Visit today!
8. Starter Motor - If the starter motor is not functioning properly, it must be replaced immediately. Buy new motors form us now!
9. Car Battery & Cables - It’s better to check for the faults in relation to the car battery and the cables and replace them immediately. Buy best quality parts from us!

Have you ever wondered why it is so important to know the symptoms of the problem? Well, it is extremely essential to know the symptoms of the problem in order to detect it. Keeping this in mind, let’s throw some light on few common symptoms of OBD error code P0B44.

Common Symptoms

• Low engine power and limited output
• Abnormal throttle response and hard cold starting
• Declined fuel economy
• Sluggish Engine and lot of noise

Fixing problems with your car is not as easy as it might seem. You need to be extremely careful and follow certain steps.

• Make sure that the battery cable connections are tight and clean. Some people think that it is an obvious step, but if your computer does not get a steady feed of electricity from the battery, it can cause multiple issues. Check for wires and connectors that might be rubbed through, disconnected or loose. It is also important to check the fuse box in your vehicle together with the relay centre that can be found under the hood.
• It is also important to make sure that the fuses are good. Make sure that there is no melted plastic that can cause fire. These are some of the major wiring problems that you will encounter with error code P0B44. Once you have completely checked all the obvious things and still you can’t find the right solution, then you have to begin suspecting either the computer or the sensor.

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Do you wish to diagnose P0B44 error code easily? Here are some steps which you should follow in order to diagnose this fault code:

• Visually inspect all the wiring and connectors in relation to the sensor and the connector.
• Replace any defective, corroded or shorted wiring and connectors.
• Retest your car’s system once this is done, to ensure that the repairs were done successfully and reconnect the scanner to determine if the codes have cleared.
• Test drive the vehicle to make sure that the malfunction was not intermittent. If the malfunction does seem to be intermittent, use the voltmeter to check the output of the hybrid battery cells.
• Examine the circuitry for contamination that may have leaked out of the engine and check the voltage at the battery current sensor to make sure that it is compatible with the voltage recommended by the manufacturer.
• Also check for the PCM failure as it might be faulty and may require replacement or reprogramming.

Common mistakes when diagnosing the P0B44 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. Always check for other parts apart from battery and current sensor and circuits.