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Reduced Power & Drivetrain Warning on my 2023 Lucid Air Grand Touring

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Sarah K. · rep 0 · May 22, 7:28 AM · 1 replies · solved · Question

Vehicle: 2023 Lucid Air Grand Touring

Hey everyone,

I'm experiencing a really concerning issue with my 2023 Lucid Air Grand Touring. While driving on the highway yesterday, I suddenly got a 'Drivetrain Malfunction' warning message on the screen, and the car immediately went into a reduced power mode. It felt like I lost about 70% of my acceleration capability.

I managed to safely pull over and restart the car, but the warning light came back on, and the power reduction persisted. There were no strange noises or smells, just this sudden limitation. I'm worried about what this could mean for such a new vehicle.

Has anyone else with a Lucid Air experienced something similar? What was the cause, and how was it resolved? Any advice would be greatly appreciated before I take it into the service center.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:28 AM

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ClearTheCode admin answer:

Experiencing a 'Drivetrain Malfunction' and reduced power in your 2023 Lucid Air Grand Touring is a serious concern that requires immediate attention. Given the nature of electric vehicle powertrains, these warnings typically indicate an issue within the high-voltage system, electric motors, or their control units. Here are the common causes and what you should do:

  1. Motor Inverter/Controller Fault: The inverter is crucial for converting the battery's DC power into AC power for the electric motors. A fault in this component can directly lead to power limitations or complete motor shutdown. This is a common point of failure in EVs when such warnings appear.
  2. High Voltage Battery System Issue: Problems with the battery pack itself, such as a faulty contactor, an imbalance in cell voltage, or issues with the battery management system (BMS), can trigger drivetrain warnings as the system tries to protect the battery.
  3. Electric Drive Unit (Motor) Malfunction: While less common in newer vehicles, internal issues with the electric motor (e.g., sensor failure, winding issues, bearing problems) can also cause these symptoms.
  4. Software Glitch: Sometimes, a temporary software bug or communication error between control modules can trigger false warnings. A full system reset (often done by the dealer) might resolve this, but it's not advisable to assume this without proper diagnosis.
  5. Sensor Failure: Various sensors monitor the performance and health of the drivetrain components (e.g., motor speed, temperature, current). A faulty sensor can send incorrect data, leading the system to limit power as a protective measure.

When to See a Shop:

YouYou should immediately schedule service with a Lucid service center. Do not ignore a drivetrain warning, especially when accompanied by reduced power, as it could indicate a safety-critical issue or lead to further damage if driven extensively.

Diagnostics:

Lucid service centers have proprietary diagnostic tools that can pinpoint the exact fault code (DTC) and component. While generic OBD-II scanners might show some high-voltage related codes (e.g., in the P0Axx series), the detailed information required for an EV diagnosis is usually only accessible with manufacturer-specific equipment. For example, a code like P0A7A (Drive Motor 'A' Inverter Performance) or similar could be present.

What to do now:

  • Drive cautiously: If you must drive the vehicle to the service center, do so at reduced speeds and avoid sudden acceleration or heavy braking.
  • Note details: Provide the service center with all details: when the warning appeared, what you were doing, and any other messages on the display.
  • Do not attempt DIY repairs: High-voltage systems are dangerous. Leave all diagnostics and repairs to certified Lucid technicians.
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