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2023 Lucid Air Grand Touring - Reduced Power & 'Service EV System' Warning

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James R. · rep 0 · May 22, 7:25 AM · 1 replies · solved · Question

Vehicle: 2023 Lucid Air Grand Touring

My 2023 Lucid Air Grand Touring suddenly went into reduced power mode yesterday. I was driving on the highway, and a 'Service EV System' warning popped up on the display. The car felt sluggish, and acceleration was severely limited. I pulled over, turned it off and on, but the warning persists, and the power is still reduced.

No strange noises, just this sudden loss of performance. The battery was at about 60% charge when it happened, and I hadn't noticed any issues with charging prior to this.

What could be causing this? Is there an OBD-II code I should look for with my scanner? I'm hoping it's something minor I can address before needing a tow to the service center.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:25 AM

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Hello Sarah,

Experiencing a 'Service EV System' warning along with reduced power in your 2023 Lucid Air Grand Touring indicates a significant issue within the high-voltage system or its associated components. This is a common protective measure for the vehicle to prevent further damage when a critical fault is detected.

Here's what you should consider:

  1. Scan for Diagnostic Trouble Codes (DTCs): While traditional OBD-II scanners might not access all proprietary Lucid EV system codes, they can often read generic powertrain codes (P-codes) that might point to a general area. Look for codes in the P0Axx, P0Bxx, or P0Cxx ranges, which are typically related to hybrid/EV battery and motor systems. Specific Lucid-specific codes would require a dealer-level diagnostic tool.

  2. Common Causes:

    • Battery Management System (BMS) Fault: A sensor or module within the BMS could be malfunctioning, leading to incorrect readings or an inability to properly manage the high-voltage battery pack.
    • Inverter/Motor Control Unit (MCU) Issue: Problems with the inverter, which converts DC battery power to AC for the electric motors, or the MCU that controls it, can cause power limitations.
    • High-Voltage Contactor/Relay Failure: These components connect and disconnect the high-voltage battery from the rest of the system. A fault here can interrupt power flow.
    • Cooling System Malfunction: Overheating of the battery, motors, or power electronics due to a cooling system issue can trigger protective reduced power modes.
    • Sensor Malfunction: A faulty sensor (e.g., temperature, voltage, current) within the EV system could be sending incorrect data, causing the system to react defensively.

  3. When to See a Shop: Given the nature of a 'Service EV System' warning and reduced power, it is highly recommended to have your Lucid Air inspected by a certified Lucid service center as soon as possible. This is not typically a DIY fix. Driving with this warning could potentially exacerbate the problem or lead to a complete breakdown. They have the specialized diagnostic tools and expertise to accurately pinpoint the fault within the complex EV architecture.

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