The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2023 Polestar 2: 'Reduced Propulsion Power' Warning and CEL - What to do?

0

Robert C. · rep 0 · May 22, 7:40 AM · 1 replies · solved · Question

Vehicle: 2023 Polestar 2 Long Range Dual Motor

Hey everyone,

I'm driving a 2023 Polestar 2 Long Range Dual Motor, and this morning, a 'Reduced Propulsion Power' warning popped up on the dashboard. Simultaneously, the Check Engine Light (CEL) came on. The car feels noticeably sluggish, almost like it's in a limp mode.

I'm a bit concerned as this is my daily driver. Has anyone experienced this with their Polestar 2? Is it safe to drive short distances to a service center, or should I have it towed? I've tried restarting the car, but the warning and CEL persist.

What are the common causes for this type of warning in an EV like the Polestar 2? Are there any specific OBD-II codes I should look out for if I manage to get a scanner on it? Any advice on initial troubleshooting steps would be greatly appreciated before I take it in.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:40 AM

0

ClearTheCode admin answer:

The 'Reduced Propulsion Power' warning on your 2023 Polestar 2, especially when accompanied by a Check Engine Light (CEL), indicates a significant issue within the high-voltage (HV) system or powertrain. It's the vehicle's way of protecting itself from further damage.

  1. Initial Assessment & Safety:

    • Do not drive long distances. If the car is in limp mode, it's severely restricted. Driving it could exacerbate the problem or leave you stranded. If a service center is more than a few miles away, arranging a tow is the safest option.
    • Check 12V Battery: While less common for this specific warning, a weak 12V auxiliary battery can sometimes cause a cascade of electrical errors in EVs. Ensure it's properly charged and connections are secure.
    • Scan for OBD-II Codes: If you have access to an OBD-II scanner (many auto parts stores offer free scans), connect it to the diagnostic port (usually under the dash on the driver's side). Look for codes starting with P0Axx, P0Bxx, P0Cxx, or P0Dxx, as these often relate to hybrid/EV specific powertrain issues. Common codes might include P0A00 (Motor Electronics Coolant Temperature Sensor Circuit), P0A1F (Battery Energy Control Module), or P0D20 (Drive Motor 'A' Inverter Performance). Note down all codes present.

  2. Common Causes for 'Reduced Propulsion Power' in EVs:

    • High Voltage Battery Issues: This could range from a faulty cell module, an imbalance in the battery pack, or issues with the Battery Management System (BMS).
    • Inverter/Motor Controller Malfunction: The inverter converts DC power from the battery to AC power for the electric motors. A fault here can directly impact propulsion.
    • Electric Motor Problems: While less common, an issue with one of the electric motors themselves can trigger this warning.
    • Cooling System Issues: Overheating of the battery, motors, or inverter due to a fault in the dedicated cooling system can lead to reduced power to prevent damage.
    • Sensor Failures: Various sensors monitor the HV system's health. A faulty sensor providing incorrect data can cause the system to limit power.
    • Software Glitches: Sometimes, a software bug or corruption can trigger erroneous warnings. A dealer can check for and apply relevant software updates.

  3. When to See a Shop:

    • Immediately. Given the nature of the warning and the impact on driveability, this is not a problem to ignore. A Polestar-certified service center has the specialized diagnostic tools and training to safely diagnose and repair high-voltage systems. Do not attempt to open or tamper with high-voltage components yourself.

Provide the service center with any OBD-II codes you've pulled and a detailed description of when and how the warning appeared.

Menu

Help & account