The P0B00: Auxiliary Transmission Fluid Pump Motor Phase U Current fault code refers to an issue with the Phase U current in the auxiliary transmission fluid pump motor. This fault can be caused by a faulty Phase U current sensor, an electrical issue in the Phase U circuit, or a malfunction in the auxiliary transmission fluid pump motor. If not addressed, this issue could affect the transmission fluid pump’s ability to function properly, potentially leading to transmission performance issues.
P0B00 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0B00: Auxiliary Transmission Fluid Pump Motor Phase U Current |
| Is it serious? | Yes, this issue can affect the transmission’s cooling and lubrication, which can lead to performance issues. |
| Possible causes | – Faulty Phase U current sensor in the auxiliary transmission fluid pump motor – Electrical issue in the Phase U current circuit – Faulty auxiliary transmission fluid pump motor |
| How to diagnose? | – Measure Phase U current of the auxiliary transmission fluid pump motor – Inspect wiring and connections for Phase U current sensor – Test the auxiliary transmission fluid pump motor |
P0B00 Meaning
The P0B00: Auxiliary Transmission Fluid Pump Motor Phase U Current fault code indicates that there is a problem with the Phase U current in the auxiliary transmission fluid pump motor. This current phase is essential for the proper functioning of the motor that drives the auxiliary pump, which circulates transmission fluid for cooling and lubrication. A malfunction in this phase could be due to a sensor failure, wiring issues, or a problem with the motor itself.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional related fault codes that might provide further details on the issue. | OBD-II Scanner |
| Measure Phase U Current | Use a multimeter or diagnostic tool to measure the Phase U current of the auxiliary transmission fluid pump motor. Compare the readings with the manufacturer’s specifications. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connections for Phase U Current Sensor | Visually inspect the wiring and connections associated with the Phase U current sensor for any signs of damage, loose connections, or corrosion. | Flashlight, Multimeter |
| Test the Auxiliary Transmission Fluid Pump Motor | Test the operation of the auxiliary transmission fluid pump motor to ensure it is functioning properly. If the motor is not running within normal parameters, it may need to be repaired or replaced. | Diagnostic Tool, Multimeter |
| Repair or Replace Components | If the Phase U current sensor, wiring, or the motor is faulty, repair or replace the necessary components to restore normal operation. | Repair Tools, Replacement Parts |
| Clear the Code and Test Drive | After making repairs, clear the fault code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | Re-scan the vehicle after the test drive to confirm that the P0B00 code does not return. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko