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2023 Polestar 2 - Reduced Performance Mode & P0D26 Code

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Mike T. · rep 0 · May 22, 7:40 AM · 1 replies · solved · Question

Vehicle: 2023 Polestar 2 Long Range Dual Motor

Hey everyone,

I'm having a really concerning issue with my 2023 Polestar 2 Long Range Dual Motor. While driving normally on the highway yesterday, the car suddenly went into a 'Reduced Performance' mode. I got a warning message on the display, and acceleration was severely limited.

I managed to get home and hooked up my OBD-II scanner. It pulled a P0D26 code, which I understand relates to 'Drive Motor 'A' Inverter Performance'. I've tried restarting the car a few times, but the warning light persists, and it still feels like it's in limp mode.

Has anyone else experienced this specific code or reduced performance with their Polestar 2? I'm trying to figure out if this is a common software glitch or something more serious before I take it to the service center. Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

It sounds like you're dealing with a significant issue, Sarah. The P0D26 code, 'Drive Motor 'A' Inverter Performance,' indicates a problem with the inverter module responsible for converting DC power from the battery to AC power for the electric motor. This is a critical component in your Polestar 2's propulsion system.

Here's what you should know and what steps to take:

  1. Understanding the P0D26 Code: This code specifically points to an issue with the performance of the inverter for the 'A' drive motor (often the front motor in dual-motor setups). The inverter is vital for controlling motor speed and torque, so any malfunction will directly impact driveability and power output.

  2. Potential Causes:

    • Software Glitch: Sometimes, a temporary software anomaly can trigger these codes. A full system reset or update might resolve it.
    • Wiring or Connector Issues: Loose, corroded, or damaged wiring to the inverter or motor can disrupt communication or power flow.
    • Inverter Module Failure: The inverter itself could be faulty, either due to internal component failure or overheating.
    • Drive Motor Issue: Less common, but a problem with the motor itself could indirectly affect inverter performance readings.
    • Sensor Malfunction: Sensors monitoring inverter temperature, current, or voltage could be providing incorrect data.

  3. Initial Steps You Can Try (with caution):

    • Power Cycle: You've already tried restarting, but sometimes a longer power cycle (leaving the car off for an hour or more, or even disconnecting the 12V battery if you're comfortable and know how) can clear temporary glitches. However, be extremely cautious with high-voltage systems.
    • Check 12V Battery: Even EVs rely on a conventional 12V battery for control systems. A weak 12V battery can cause a myriad of seemingly unrelated electrical issues and codes. Ensure it's fully charged and healthy.
    • Note Conditions: Did this happen after heavy acceleration, in extreme weather, or after charging? Any details might help diagnostics.

  4. When to See a Shop:

    • Immediately. Given that your vehicle is in 'Reduced Performance' mode and you have a specific powertrain code, it is highly recommended to schedule service with a Polestar service center as soon as possible. Driving with this condition can potentially cause further damage or leave you stranded.
    • Do not ignore persistent warnings. This is not a code that typically resolves itself without intervention.

  5. What a Polestar Service Center Will Do:

    • They will perform advanced diagnostic scans using specialized Polestar tools to pinpoint the exact nature of the inverter performance issue.
    • Check for any available software updates that might address known issues.
    • Inspect wiring harnesses and connectors for damage or corrosion.
    • Test the inverter module and related high-voltage components.
    • If necessary, they will replace the faulty inverter module or other affected components. Remember, high-voltage work requires specialized training and equipment, so this is definitely a job for the professionals.
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