P0A48 - OBD Trouble Code

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The high voltage system which does not operate properly is generally defined as the drive motor ‘B’ position sensor circuit high. With the sensors help, the location of the internal component of a hybrid motor is found by the hybrid control module. In case, the hybrid control module finds the position sensor to be faulty, then the ECM module will set the P0A48 error code in the vehicle.

The position of magnetic poles of a motor generator’s rotor is found by the resolver which functions as a sensor. It is crucial to find the location of poles to get absolute control of MG1 and MG2. The stator of each resolver will have an excitation coil and 2 detection coils(S&C). As the rotor keeps turning due to its oval shape, the gap between stator and rotor will also keep changing. Through the excitation coil and detection coils S&C, a varying current with fixed frequency keeps flowing in concurrent with the position of sensor rotor. MG ECU will find the correct position of the rotor depending on the phases of detection coils S and C and waveform’s height. To utilize the resolver as sensor, the change in location with fixed length of time is calculated by the CPU. MG ECU will find the malfunctions as well as monitor the motor resolver’s signal output.

What causes this problem with the Drive Motor "B" Position Sensor Circuit High?

• The inverter as well as the converter assembly might face some problem.
• Issue with the hybrid vehicle generator assembly.
• Improper functioning of the hybrid vehicle motor assembly.
• Issue with either the connectors or the engine wiring harness.

1. Position Sensor - Is The Position Sensor Broken? Are You Looking For A Replacement? Get It From Parts Avatar At Best Prices.
2. Drive Coil - The Defective Drive Coil Must Be Replaced Immediately So That The P0A48 Error Code Is Avoided.
3. Metallic Rotor - Get The Replacement For A Damaged Metallic Rotor At Affordable Cost From Parts Avatar.
4. Motor Generator - Examine The Motor Generator For Any Possible Damages. If You Come Across Any Defects Replace It Immediately.
5. Converter Assembly - The Vehicle Will Function Normally If The Faulty Converter Assemble Is Replaced Instantly.
6. Generator Assembly - Any Possible Defects In The Generator Assembly Has To Be Replaced Immediately To Avoid Further Troubles.
7. Motor Assembly - If You Are Looking For A Replacement For The Damaged Motor Assembly, Get It From Parts Avatar At Affordable Cost.
8. Engine Wiring Connector - An Easiest Way To Get Rid Of The P0A48 Error Code Is To Replace The Damaged Connectors As Soon As Possible.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0A48 code by mentioning some major symptoms below:

Common Symptoms

• Flashing of the engine light or the service engine will indicate you with a warning light.

Have a look at some ways with which you can correct the P0A48 code:

• Replacement of the damaged converter assembly and generator assembly.
• Defective connectors needs fixation.
• The damaged motor generator and motor assembly needs to be repaired.

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• Diagnosing the P0A48 trouble code is not that difficult where the mechanic will use a scanner to address this issue.
• If there are any issues with the position sensor or the drive coils, it will be addressed first.
• After fixing this issue, if the error code still exist, then the mechanic will check the motor generator, converter assembly, generator assembly, and motor assembly.
• If any of these components are damaged or defective, they will be replaced with a new one.
• As a very rare case, the connectors can be damaged or broken. If they are found to be defective, the mechanic will fix them too.
• Additional trouble codes like warning light from service engine have to be addressed first, before fixing the P0A48 error code.
• Once all this issues are addressed, the mechanic will then reset the code. After resetting, the vehicle will be test driven to see if the error codes appear again. This will finally help the mechanic to know as to where the issue arose.

Common Mistakes When Diagnosing the P0A48 Code

The mechanic may look for faults in the components like drive coil, position sensor, connectors, and so on whereas the actual fault may lie with the wires, high voltage control module and high voltage motor which needs replacement.