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pol_br001
Moderate
Polestar · Electric Cars
Regenerative Braking Reduced
Quick Answer
Error code POL_BR001 on your Polestar Electric Cars means: Regenerative Braking Reduced. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
PS2PS3PS4PS5PS6
Likely Causes
  1. High-voltage battery near full charge unable to accept additional regenerative energy
  2. Motor or inverter thermal limit reducing available regenerative current acceptance
  3. Cold battery temperature limiting the rate at which the pack can accept regenerative charge
  4. BMS entering protective mode restricting regen input due to cell voltage imbalance
  5. Brake-by-wire system fault causing fallback to reduced regenerative braking level
How to Fix It
1
Reduce battery state of charge below 90% to restore full regenerative braking availability
2
Pre-condition the battery before driving in cold weather to warm cells to optimal range
3
Allow the motor and inverter to cool if regen reduction follows intensive driving
4
Verify brake-by-wire system has no active fault codes via vehicle diagnostics
5
Contact Polestar service if regenerative braking is persistently reduced at normal operating conditions
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Brake-by-wire actuator module (if brake system fault is identified)
Diagnostic interface for BMS data monitoring
Battery thermal management coolant if thermal-related
Related Error Codes
POL_HV001POL_HV002POL_HV003POL_CP001POL_CP002
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