The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2023 Polestar 2 - Sudden Reduced Power and "Service Required" Message

0

Heather Y. · rep 0 · May 22, 7:43 AM · 1 replies · solved · Question

Vehicle: 2023 Polestar 2 Dual Motor Long Range

My 2023 Polestar 2, Dual Motor Long Range, recently started acting up. While driving, I suddenly experienced a significant reduction in power, almost like a "limp mode." A "Service Required" message popped up on the display, along with a warning light that looked like a wrench or gear.

I pulled over, turned it off, and on again, and the power seemed to return briefly, but then it happened again. I'm worried this is a serious issue with the electric motor or the high-voltage battery system. The car only has about 15,000 miles on it.

Has anyone else experienced this with their Polestar 2? What could be causing this?

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode admin answer:

This symptom, often referred to as "limp mode" in EVs, indicates the vehicle's onboard computer has detected a fault within the high-voltage system, electric motor, or related power electronics. Common causes include:

  1. High-Voltage Battery System Fault: Issues with battery cell balancing, a faulty battery module, or a problem with the Battery Management System (BMS) can trigger this. The BMS monitors the health and performance of the battery.
  2. Electric Motor/Inverter Issues: A fault in one of the electric motors (front or rear) or the inverter (which converts DC battery power to AC for the motors) can lead to reduced power. Overheating or sensor malfunctions are possibilities.
  3. Cooling System Problems: The high-voltage battery and electric motors rely on a robust cooling system. A fault in the coolant pump, radiator, or a leak can cause components to overheat, leading to power reduction to prevent damage.
  4. Software Glitch: Less common, but sometimes a temporary software bug can trigger erroneous warnings and power limitations.

Diagnostics: When such an event occurs, the vehicle's diagnostic system typically stores specific Diagnostic Trouble Codes (DTCs). Common OBD-II codes related to EV powertrain issues might include:

  • P0A1F: Drive Motor 'A' Control Module Internal Temperature Too High
  • P0A7A: Hybrid Battery Pack Over Temperature
  • P0AA6: Hybrid Battery Voltage System Isolation Fault
  • P0A80: Hybrid Battery Pack Over Voltage
  • P0A94: DC/DC Converter Performance

Note: Polestar uses manufacturer-specific codes in addition to generic OBD-II codes, which a dealership scanner can read.

When to See a Shop:

  1. Immediately: Any persistent "Service Required" message accompanied by reduced power should be addressed immediately. Continuing to drive in this state can potentially worsen the underlying issue or leave you stranded.
  2. Dealership Visit: Given the complexity of EV high-voltage systems, this is not a DIY fix. You should schedule an appointment with a certified Polestar service center as soon as possible. They have the specialized diagnostic tools and training to safely and accurately diagnose and repair these systems.
  3. Safety First: If the vehicle enters limp mode, pull over safely when possible. Do not attempt to reset the system multiple times or ignore the warning. Contact Polestar Roadside Assistance if you are unable to drive the vehicle to a service center.
Menu

Help & account