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2023 Lucid Air Grand Touring - Reduced Power & Drivetrain Malfunction Warning

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Mike T. · rep 0 · May 24, 4:14 PM · 1 replies · solved · Question

Vehicle: 2023 Lucid Air Grand Touring

Hey everyone,

I'm experiencing a concerning issue with my 2023 Lucid Air Grand Touring. Recently, I've noticed a significant reduction in power, especially during acceleration. It feels like the car isn't delivering its full potential, almost like it's in a 'limp home' mode.

Yesterday, a 'Drivetrain Malfunction' warning light came on, accompanied by a message about 'Reduced Propulsion Power' on the dashboard. There's also a subtle, high-pitched whine that wasn't there before, particularly noticeable at lower speeds and under light acceleration.

Has anyone else encountered this with their Lucid Air Grand Touring? What could be causing this? I'm a bit worried as it's a relatively new car, and I rely on its performance. Any advice on what steps I should take before heading to the service center, or if there's anything I can check myself?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 24, 4:14 PM

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Hello Sarah,

It sounds like you're dealing with a serious drivetrain issue, and your concern is completely valid. A 'Reduced Propulsion Power' message combined with a 'Drivetrain Malfunction' warning indicates a problem within the high-voltage powertrain system that requires immediate attention. The high-pitched whine further points to a mechanical or electrical fault.

Here's what could be happening and what you should do:

  1. Potential Causes:

    • Electric Motor or Inverter Faults: The electric motors or their inverters (which convert DC battery power to AC for the motors) can develop issues, leading to reduced power and unusual noises. Diagnostic trouble codes like P0A7A (Drive Motor 'A' Inverter Performance) or similar manufacturer-specific codes are common here.
    • High-Voltage Contactor/Relay Issues: Problems with the contactors that connect and disconnect the high-voltage battery to the rest of the system can interrupt power flow.
    • High-Voltage Battery Management System (BMS) Faults: While the warning is drivetrain-specific, the BMS can sometimes trigger such alerts if it detects an imbalance or fault affecting power delivery.
    • Transmission/Reduction Gear Problems: Although EVs have simpler drivetrains, the reduction gear assembly can still experience wear or lubrication issues, leading to noise and power loss.
    • Sensor Malfunctions: Speed sensors, temperature sensors within the drivetrain, or current sensors can provide incorrect data, causing the system to limit power.

  2. Immediate Actions:

    • Do Not Ignore: This warning is critical. Continuing to drive with reduced propulsion power and a drivetrain malfunction could potentially cause further damage or leave you stranded.
    • Limit Driving: If you must drive, do so minimally and avoid high speeds or heavy acceleration.
    • Document Everything: Note the exact messages, sounds, and conditions under which the problem occurs.

  3. When to See a Shop:

    • Immediately: You should schedule a service appointment with a Lucid service center as soon as possible. This isn't a DIY fix. Lucid vehicles are highly sophisticated, and these warnings require specialized diagnostic tools and expertise.

  4. What the Service Center Will Do:

    • Technicians will connect the vehicle to their diagnostic system to read specific fault codes (DTCs) from the powertrain control modules. These codes will pinpoint the exact area of concern.
    • They will perform detailed inspections of the electric motors, inverters, high-voltage cabling, contactors, and the reduction gear assembly.
    • Software updates or resets might be attempted, but typically, a physical component inspection or replacement is needed for these types of warnings.

Given your vehicle's model year, it should be well within its factory warranty, which will cover repairs for such issues. Ensure you provide all the details you've observed to the service technician.

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