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Inconsistent Regenerative Braking on my 2022 Polestar 2

0

Robert C. · rep 0 · May 22, 7:43 AM · 1 replies · solved · Question

Vehicle: 2022 Polestar 2 Long Range Dual Motor

Hey everyone,

I've been noticing some really inconsistent regenerative braking on my 2022 Polestar 2 Long Range Dual Motor lately. Sometimes it works perfectly, giving that strong one-pedal driving feel, but other times it feels significantly weaker, almost like it's not engaging properly.

It's particularly noticeable when I'm driving in varying conditions, like going from highway speeds to city driving. I haven't changed any settings, and the battery charge level doesn't seem to be the primary factor, as it happens even when the battery isn't full.

Has anyone else experienced this with their Polestar 2? Is this a known issue, or could it be a sign of something more serious with the drivetrain or braking system? Any insights would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

0

This is a common concern for EV owners, and regenerative braking performance can indeed vary based on several factors. While it's usually normal, significant inconsistency warrants attention.

Here's what might be happening and what you can do:

  1. Understand Normal Regen Behavior:

    • Battery State of Charge (SoC): When the battery is near 100% charge, the car will reduce or disable regenerative braking to prevent overcharging. This is normal.
    • Battery Temperature: Cold batteries are less efficient at accepting a charge. In colder weather, your Polestar 2 will limit regenerative braking until the battery warms up. Conversely, extremely hot batteries can also see reduced regen.
    • Driver Input: If you're pressing the accelerator even slightly, or if the car's stability control system detects wheel slip, regen might be temporarily reduced.
    • Brake System Health: The car's traditional friction brakes work in conjunction with regen. Issues with brake sensors or the ABS system could indirectly affect how regen is blended.

  2. Troubleshooting Steps:

    • Check Battery SoC and Temperature: Monitor your battery percentage and if possible, the battery temperature (some third-party apps or diagnostic tools can show this). If it's very cold outside, try pre-conditioning your car before driving.
    • Verify Settings: Double-check your regenerative braking settings in the infotainment system. Ensure it's set to your preferred level (e.g., "Standard" or "Low" if you've changed it).
    • Software Updates: Ensure your Polestar 2's software is up to date. Manufacturers often release updates that improve system performance, including drivetrain and braking logic.
    • Observe Patterns: Try to note when and under what conditions the inconsistency occurs. Is it always after a full charge? Only in cold weather? At specific speeds? This information is valuable for diagnosis.

  3. When to See a Shop:

    • Persistent Loss of Regen: If you experience a complete or near-complete loss of regenerative braking that doesn't resolve with battery conditions or temperature changes, it's time to visit a Polestar service center.
    • Warning Lights: If any warning lights related to the braking system (e.g., ABS, traction control, or a general drivetrain warning) illuminate on your dashboard, seek immediate professional inspection.
    • Unusual Noises or Feel: Any new grinding, squealing, or strange pedal feel accompanying the regen issues should prompt a service visit.
    • No OBD Codes for Regen: Unlike traditional engine issues, there aren't specific OBD-II codes directly for "reduced regenerative braking" in the same way. However, a diagnostic scan at a Polestar service center can reveal fault codes related to the battery management system (BMS), electric motor control unit (EMCU), or braking system (ABS/ESP) that could indirectly explain the issue. For example, codes like P0A80 (Replace Hybrid Battery Pack) or P0AA6 (Hybrid Battery Voltage System Isolation Fault) are more severe, but less direct issues might show up as manufacturer-specific codes related to power electronics or brake blending.

It's always best to have a qualified Polestar technician diagnose any persistent or concerning drivetrain behavior.

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