Tesla "Extrenal Isolation" guide to Fix it (BMS_a151)

Tesla "Extrenal Isolation" guide to Fix it (BMS_a151)

1. Introduction

This is generic alert. There could be many reasons for this alert. In this free guide, you will get info about how to diagnose the issue, what could be the reasons for this alert, how to fix it, Cost to fix, Online support, Find and book an appointment to fix alert in best affordable workshop, Buy spare parts etc.

Tesla External Isolation BMS_a151

2. How to Fix it

It need to check isolation on each of the individual components from expert who are trained to work High Voltage Components. 

Some of typical reasons for external isolation are:

  • Battery Coolant Heater
  • Large Drive Unit coolant leakage
  • Drive Unit
  • DCDC Converter
  • AC Compressor
  • High Voltage Cables & Components
Tesla External Isolation BMS_a151

2.1 Drive Unit

One of reason could be issue with Drive Unit. More details Link

2.2 Battery Coolant Heater

Please check out more details about battery coolant heater in another guide. Link

Vehicle May not Restart

Please read more details in another guide about External Isolation. Link

Alert Code

Possible alert code

BMS_a151

BMS_f151

BMS_f151 Tesla Extrenal Isolation - How to Fix it
Tesla BMS_f151 Extrenal Isolation - How to Fix it

BMS_w151

Tesla Extrenal Isolation - How to Fix it BMS_w151

Online Support

In case, if you have any question or need any support/help. Please feel to contact us Contact Us or Whats App +49 (0) 15226242038

Find, compare and Book workshop to Fix it

If are you looking for best workshop who is expert to fix such issue with good price. Please contact us we will be happy to organize an appointment with workshop or find, compare and book best workshop in Workshop Locator

Book an Appointment

If you would like to book an appointment.

Book an Appointment to Fix an affordable Workshop

Buy New/Used Spare Parts

If you would like to buy spare parts. Please have a look in our catalog or Contact Us Phone/Whats App +49(0)15226242038

Donation/Support

If you feel you have benefited from this guide. Please consider donation, which will help us to create more such free guide for you. It will also show us that this guide was helpful for you.

For Repair Workshop Owner

If you car repair workshop owner and would like to add your workshop in our list. Please contact us.

Comment

Please leave us comment if you have any questions, if you would like to add/edit/delete some content in guide, if you would like to have guide on any another topic etc.

Share this guide Link

Please feel to share this guide/website link.

FAQ

Back to blog

Disclaimer: Tesla, Inc. was not involved in the creation of this document. Tesla did not provide us any info. Tesla did not edit, review or authorize us. We gather this information from Tesla official website and other resources.

Note: It is your responsibility to double check and confirm that the procedures/info mentioned in this blog are applicable to your specific car before performing them. Please contact us or our workshop partner to make sure/confirm. We will be happy to help you.