Tesla Maximum Charge Level & Range Reduced how to fix

Tesla "Maximum Charge Level and Range Reduced" Guide to Fix It, Cost (BMS_a066)

1. Introduction

1.1 What does this alert mean?

It is a warning/alert/fault from Battery Management System that there might be problem with car High Voltage Battery or Charging System which could have an impact on Charging Level, Range and Performance. Issue need to fix as soon as possible early to prevent from another impact. 

Tesla Maximum Charge Level & Range Reduced

1.2 What could happen?

  • Your car might not able to charge full capacity (100%).
  • You might not able to drive same distance the way you used to.

1.3 What could be the Reasons

There could be several reasons for this issue. Some of common reasons could be

  1. Battery Degradation with time, car battery start degradation. Degradation is normal process. You might need to replace high voltage battery.
  2. Charging System: One of reasons could be problem with Charging System.
  3. Faulty components: one of reasons could be faulty component in Battery Charging System, Charging Port etc.

2. How to Diagnose

It could be diagnosed via Service Mode or Remote Diagnosis. Please contact us for more details.

Book an appointment with Repair workshop for diagnosis to find out the cause for this alert. We will be happy to provide you an appointment with our partner workshop. Please reach out us for an appointment/support info@CarRepairsService.com or via Contact Form 

3. How to Fix

3.1 Repair High Voltage Battery

It will save you huge amount of money. There are some Tesla Battery Independent specialist shops which can repair battery. Please contact us for more details. 

Battery Repair more details in another blog

3.2 HV Battery Replacement

It will cost couple of thousand dollar/Euro. Price could very depend on so many factors. Some of factors could be condition of battery (new, used, remanufactred), region/country/city, type of workshop etc.

3.3 Calibrating BMS

If you calibrate your car Battery Management System. It could fix the issue.

3.4 Battery Cells Voltage Imbalance

Online Support

If you have any question or need support/help. Please Connect Us.

Alert Code

Possible alert code

BMS_a066

BMS_a066_SOC_Imbalance_Warning

Tesla BMS_a066 Maximum Charge Level & Range Reduced
Tesla BMS_a066 how to fix

Tips to extend your car battery life and prevent the error message

  • To have latest software version
  • Avoid charging battery 100% on regular basis
  • Avoid battery run down 0%
  •  Avoid Charging battery at extreme conditions
  • Avoid fast charging on regular basis

FAQ

1. Car under warranty?

Tesla Battery warranty covers for 8 years 160,000 - 240,000 km whichever comes first, with minimum 70% retention of Battery capacity over the warranty period. (Source Tesla). If you car is under warranty. It is recommended to connect with Tesla. Vehicle Warranty details

2. Car not under warranty

It is recommended to perform repair with independent Tesla Experts to save money and get best repair. 

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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.