The P0A79: Drive Motor “B” Inverter Performance fault code indicates an issue with the inverter responsible for drive motor “B.” This could result from a faulty inverter, a performance issue in the inverter, or a problem with drive motor “B” itself.
P0A79 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0A79: Drive Motor “B” Inverter Performance |
| Is it serious? | Yes, this issue can affect the vehicle’s electric drive system, potentially leading to improper or reduced performance of drive motor “B.” |
| Possible causes | – Faulty drive motor B inverter – Inverter performance issue – Faulty drive motor B |
| How to diagnose? | – Test drive motor B inverter performance – Inspect inverter for faults – Test drive motor B operation |
P0A79 Meaning
The P0A79: Drive Motor “B” Inverter Performance code indicates that the inverter responsible for controlling drive motor “B” is not operating as expected. The inverter is crucial for converting DC power from the battery to AC for the motor, and any malfunction could affect the motor’s ability to function properly. This can lead to performance issues or even failure to engage drive motor “B.”
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional fault codes related to the inverter or drive motor “B” that may offer further insight. | OBD-II Scanner |
| Test Drive Motor B Inverter Performance | Use a diagnostic tool to test the performance of drive motor “B” inverter, ensuring it is converting power properly and operating within manufacturer specifications. | Diagnostic Tool, Multimeter |
| Inspect Inverter for Faults | Visually inspect the drive motor “B” inverter for signs of overheating, damage, or poor connections that may impact its performance. | Flashlight |
| Test Drive Motor B Operation | Perform a functional test on drive motor “B” to ensure it is operating properly and not the cause of the performance issue. | Diagnostic Tool |
| Inspect Wiring and Connections | Check the wiring and connections between the inverter and drive motor “B” for signs of wear, damage, or loose connections. Repair as necessary. | Flashlight, Multimeter |
| Clear the Code and Test Drive | After completing 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 | After the test drive, re-scan the vehicle to ensure the P0A79 code does not return. | OBD-II Scanner |
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