HomeBrandsPolestarElectric Carspol_hv001
pol_hv001
Moderate
Polestar · Electric Cars
HV Battery Isolation Fault
Quick Answer
Error code POL_HV001 on your Polestar Electric Cars means: HV Battery Isolation Fault. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
PS2PS3PS4PS5PS6
Likely Causes
  1. Degraded or damaged high-voltage cable insulation creating a ground leakage path
  2. Moisture or water ingress into the high-voltage battery enclosure
  3. Contaminated or corroded high-voltage connector reducing isolation resistance below threshold
  4. Internal battery cell failure or separator degradation causing isolation loss
  5. HV wiring harness damage from underbody impact or road debris
How to Fix It
1
Stop the vehicle safely and refrain from driving until the fault is investigated
2
Inspect all accessible high-voltage cables for visible insulation damage, chafing, or cuts
3
Check underbody components for signs of impact damage that may have compromised HV cables
4
Use a certified HV isolation resistance diagnostic tool to measure isolation values
5
Contact Polestar service for a full high-voltage system inspection and cable or pack repair
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
HV cable harness assembly
HV connector repair kit
Battery enclosure sealing gasket
Isolation resistance diagnostic tester
Related Error Codes
POL_HV002POL_HV003POL_CP001POL_CP002POL_DU001
Video Guides
Loading video guides…
Search more on YouTube →