Reduced Charging Speed & Range on my 2022 Polestar 2 - Any TSBs?

ClearTheCode admin answer:

It's concerning to hear about the reduced charging speed and range on your 2022 Polestar 2. This is a common area of concern for EV owners, and several factors could be at play. Here’s a breakdown of potential causes and what steps you can take:

1. Software Glitches or Updates: Polestar vehicles are heavily reliant on their software. A recent over-the-air (OTA) update might have introduced a bug affecting the Battery Management System (BMS) or charging protocols. Conversely, an outdated software version could also be the culprit, as Polestar frequently releases updates to optimize battery performance and charging.

2. Battery Thermal Management System (BTMS) Issues: The battery's temperature significantly impacts charging speed and efficiency. If the BTMS isn't functioning optimally, the car might limit charging power to protect the battery, especially in very hot or cold weather. This could also indirectly affect perceived range if the battery isn't operating at its ideal temperature.

3. Charging Infrastructure Problems: Sometimes, the issue isn't with your car but with the charging station itself. Public chargers can be faulty, throttled due to high demand, or share power with multiple vehicles. Test your vehicle at several different public AC and DC fast chargers, as well as your home charger, to help isolate the problem.

4. On-board Charger (OBC) or DC-DC Converter Fault: These critical components manage the power flow during charging. A fault in either could restrict the amount of power the battery receives, leading to slower charging. While less common in newer vehicles, component failures can occur.

5. Battery Degradation (Less Likely for a 2022 Model): While modern EV batteries are designed for longevity, factors like frequent high-power DC fast charging, consistent charging to 100%, or prolonged exposure to extreme temperatures can accelerate degradation. For a 2022 model, significant degradation would be unusual unless specific conditions were met.

Diagnostics & OBD Codes: While Polestar uses proprietary diagnostic tools, a general OBD-II scan might reveal generic powertrain codes if a major system fault exists. However, for specific battery or charging system issues, Polestar's dedicated diagnostics are usually required. Codes related to the BMS (e.g., P0AA6 - Hybrid Battery Voltage System Isolation Fault, or manufacturer-specific codes indicating charging module errors) could be present.

What to Do:

1. Reboot the Infotainment System: A simple restart of the car's infotainment system (holding the home button for 20 seconds) can sometimes resolve minor software glitches.
2. Check for Software Updates: Ensure your Polestar 2 has the latest software version installed. You can check this in the car's settings or via the Polestar app.
3. Verify Charging Stations: As mentioned, try different charging stations to rule out external factors.
4. Check for Recalls/TSBs: Use your VIN on the Polestar support website or the NHTSA website (nhtsa.gov) to check for any open recalls or TSBs related to battery performance or charging. Polestar has issued TSBs for software optimizations affecting range in the past.

When to See a Shop: If the issue persists after trying the above steps, or if you notice a sudden, drastic drop in range or charging capability, it's crucial to schedule service with Polestar immediately. They have specialized diagnostic equipment to accurately assess battery health, OBC functionality, and identify any underlying software or hardware faults. Ignoring significant charging or range issues could potentially lead to further complications or leave you stranded.