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2023 Polestar 2 sudden power loss and 'Reduced Performance' warning

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Ashley M. · rep 0 · May 22, 7:43 AM · 1 replies · solved · Question

Vehicle: 2023 Polestar 2 Long Range Dual Motor

Hey everyone, I'm hoping someone can shed some light on an issue I just experienced with my 2023 Polestar 2 Long Range Dual Motor. I was driving on the highway yesterday when suddenly the car felt like it lost a significant amount of power. A warning message popped up on the display saying 'Reduced Performance' and the car wouldn't accelerate past about 40 mph.

It felt like it went into a limp mode. I pulled over safely, turned the car off, waited a few minutes, and then turned it back on. The message was gone, and it drove normally for the rest of the trip, which was a relief.

However, I'm really worried it might happen again, especially since I rely on this car for my daily commute. Has anyone else encountered this with their Polestar 2? What could be causing this kind of intermittent power reduction and warning message?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:43 AM

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This 'Reduced Performance' message and sudden power loss in your 2023 Polestar 2 is a critical issue that warrants attention, even if it resolved itself temporarily. It indicates the vehicle's onboard systems detected a fault severe enough to limit power output to protect components or ensure safety.

Here are potential causes and steps to consider:

  1. Battery Management System (BMS) Fault: The BMS monitors the health, temperature, and charge of the high-voltage battery. A fault here can trigger power limitations to prevent damage to the battery pack.
  2. Motor Inverter/Controller Issue: The inverters convert DC power from the battery to AC power for the electric motors. A malfunction in one of these units, or its cooling system, can lead to reduced motor performance.
  3. High Voltage (HV) System Fault: Problems with the high-voltage cabling, contactors, or other components within the HV system can cause intermittent power delivery issues.
  4. Cooling System Malfunction: The battery and electric motors rely on dedicated cooling systems. If these systems are not operating efficiently, components can overheat, leading to performance reduction.
  5. Software Glitch: While less common for such a severe symptom, a temporary software anomaly could sometimes trigger erroneous warnings or limp mode. Ensure your vehicle's software is up to date.

Common OBD Codes (if scanned): While Polestar uses proprietary diagnostics, generic EV-related codes might appear, such as P0A00 series (Motor Electronics Coolant Pump Control Circuit), P0AA6 (Hybrid Battery Voltage System Isolation Fault), or P0D27 (Drive Motor 'A' Inverter Performance).

When to see a shop:

  • Immediately: If the issue recurs, if any other warning lights appear (especially a 'Check Engine' or 'Service Required' light), or if you notice any unusual noises or smells.
  • As soon as possible: Even if it doesn't recur, it's highly recommended to schedule an appointment with a Polestar service center. They have specialized diagnostic tools that can read detailed fault codes and logs from your vehicle's systems, which are crucial for accurately identifying the root cause. Do not delay, as recurring issues could potentially lead to a complete breakdown or further damage.
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