1. Introduction
This is a generic alert, and there may be various reasons for its occurrence.
In this guide, you will get following information:
- How to diagnose the exact cause of the alert
- Possible causes for the alert
- How to fix and clear
- Estimated cost to resolve the alert
- How to get quick, easy and affordable remote support (Whats App +49(0)15226242038)
Remote Diagnosis and support to clear alerts
Feel free to contact us on Whats App +49(0)15226242038. We are happy to assist with remote diagnosis and provide support to clear alerts at affordable prices.
2. How to Diagnose
This alert may occur because one or more system or features are disabled or faulty. The exact cause of the alert can be diagnosed with the help additional alerts.
2.1 How to check additional alert
Additional alerts can be checked via Remote Diagnosis or Service Mode.
If you need support to check additional alerts, feel free to Connect Us Phone/Whats App +49(0)15226242038
2.2 Remote Diagnosis
Remote diagnosis will provide the exact cause of the alert. We offer Remote Diagnosis with affordable prices. Please contact us or book a remote diagnosis. Book Remote Diagnosis
If you have any question about remote diagnosis (how it work), please refer our another guide
If you need support, feel free to Contact Us Phone/Whats App +49(0)15226242038
2.3 Service Mode
In some cases, it can be be possible to find out the exact cause of the alert in Service Mode with the help of following details:
- Service Alerts in Service Mode
- Self-Diagnose in Service Mode
How to check service alerts in Service Mode
- On the touchscreen, click Controls (vehicle icon) > Software
- Touch and hold the large word "MODEL" for 4 seconds and then release.
- Enter "service" as access code (password).
- Clicking Service Alerts to view active and recent alerts. If there is any issue, it will appear in Service Alerts.
For more information, please refer another guide (How to do enable Service Mode) Link
If you need support for diagnosis, please feel free to Connect Us or Whats App +49 (0) 15226242038
Send us Service Alerts Photos to clear alerts
Please send us "Service Alert" photos via Contact or Whats App +49 (0) 15226242038.
We will be happy to help you to clear alerts.
CAC max
CAC min
3. Steps to Clear Alert
Some alerts may be resolved by restarting the system, updating the software, reinstalling the software, repairing the hardware, or performing a reset.
3.1 Restart System
Some alerts may be resolved by restarting the touchscreen or powering of the car.
Restart the Touchscreen
First, you can try a soft reset (touchscreen reset).
How to perform a Soft Reset (Restart the Touchscreen)
- Shift the car into park.
- Press and hold both scroll buttons on the steering wheel until the touchscreen turns black.
- Wait approximately 30 seconds for the touchscreen to restart.
For more details, please refer another guide on how to perform these steps Link
Powering Off the Car
If a soft reset (touchscreen restart) has not resolved the alert or issue, you can try a hard reset (powering off the car).
How to Perform a Hard Reset
- Shift the car into park
- On the touchscreen, go to Controls > Safety > Power Off
- Wait at least for two minutes without interacting with the car. Do not open the doors, press the brake pedal, or touch the touchscreen etc.
- After two minutes, press the brake pedal or open the door to wake the car (Source Tesla)
3.2 Software fix
Some alert may be related to software bugs or glitches.
Software Bug and Glitches
One possible reason could be software bug or glitches.
- Did you receive this alert after updating recent software version?
- If yes, it could be related to a software bug and may be resolved in a future software update.
- Please send us screenshot of the Service Alert, and we will inform you if it could be related to software bug. Link
Firmware not Updated
One of the main reasons could be that firmware is not updated.
-
Have you checked for the latest software update and installed the most recent version?
- If not, it is recommended to install latest software version.
- Please ensure that your car is running the latest software version.
How to install latest software version
Controls > Software > Update Available
For more details, please refer to another guide how to install the latest software version. Link
3.3 Hardware Fix
There may be hardware issue or faulty component. Some of common hardware issues include:
Recent Repair
Some alerts may appear if repair was not done properly or if system was not reset.
Did this alert appear after recent repair or service?
- If yes, please let us know which repair or service was performed.
Did you use aftermarket, used spare part?
Weak Brick short
For more details, please contact us.
Imbalance
For more details, please contact us.
CAC Imbalance
MCU Replacement
Have you performed recently MCU Replacement. If yes, please let us know, we can help to clear alert.
Other Hardware issues
Please send us a screenshot or video of your car service alerts, along with your car model and year.
Describe issue as much as you can etc. We will be happy to provide you remote diagnosis and support to clear alerts.
Due to trade secrets, we can not share certain details here.
Feel free to Contact us or Whats App +49 (0) 15226242038. We will be happy to help you to clear the alerts.
How to clear/reset
CLEAR BMS SOC1 Snapshot
Healthy Battery Pack
Its possible to check battery pack health condition. If battery pack is healthy.
Mobile Application to reset Alert
Our Mobile Application allow to reset BMS alerts. Please contact us for access.
Cost
Cost with us
Cost could vary depend on issue, type of workshop, location. If you are looking for online support or affordable Tesla independent workshop. Please feel to Contact Us or Call/Whats App +49 (0) 15226242038. Please have a look on common repair prices Price List
Cost to clear BMS_u029 with OEM
Need to replace High voltage battery which could cost 10-20 thousands Euro/Dollars depend on Model.
Repair Estimate
Please feel to Contact Us or Call/Whats App +49 (0) 15226242038. We will be happy to provide you estimate and book an appointment for you in best affordable workshop.
Remote diagnosis and support to clear alert
In case, if you have any question or need any support/help. Please feel to contact us Contact Us or Call/Whats App +49 (0) 15226242038.
Find, compare and Book best affordable workshop to fix alert
If are you looking for best workshop who is expert to fix such issue with good price. You can find and compare hundreds of Tesla independent workshops. Please feel free to contact us. We will be happy to organize an appointment with workshop. Please find best workshop through our Workshop Locator
Book an Appointment to fix Alert
If you would like to book an appointment with transparent prices (no hidden cost, unexpected surprises).
Book an appointment to fix alert in an affordable Workshop
Buy New/Used Spare Parts
Part price could vary depend on condition (New, Used etc.), OEM or Aftermarket part etc.
If you would like to buy new/used spare parts. Please have a look in our catalog or Contact Us Phone/Whats App +49(0)15226242038
Alert Code
Some of most common possible alert code.
You might have received one of following alert.
1. BMS_u029
- BMS_u029_dSoc_Limiting
- Maximum battery charge level reduced
- There is condition internal to the high voltage (HV) battery requiring the battery management system (BMS) to limit the maximum allowed brick voltage.
- The target max brick voltage for charge is limited to the voltage corresponding to 50% state of charge (SOC).
- BMS_w117_SW_Delta_SOC_Weak_Short is set and MCU_dSocAlertEnable=1 and BMS_a117_silentLimiting=1.
- BMS_w117_SW_Delta_SOC_Weak_Short is clear or MCU_dSocAlertEnable=0.
Model S (2012-2020) Model X (2015-2020)
2. BMS_a029
Model 3, Y S/X (2021+)
Please send us your "Service Alert" Screenshot via Contact or Whats App +49 (0) 15226242038. We will be happy to provide you support to fix/reset alert with affordable prices without going to service center which could save your money and time. We can help you to explain the possible cause, how to diagnose, how to fix/reset/repair etc.
For Repair Workshop Owner
If you are workshop owner and would like to add your workshop in our list. Please contact us.
For Car Mechanic
There are some car owner who like to buy spare parts from OEM or Aftermarket and prefer to do Mobile Service, DIY or need support. If you would like to offer this services to car owner in your region. Please contact us.
Frequently Asked Questions (FAQs)
Can I do at Local Workshop, Independent Tesla Workshop?
Yes, you can. However, please make sure that workshop knows how to work to Tesla Cars. If local workshop need any support. Please feel to contact us. We will be happy to provide online shop. You can also find workshop in our Workshop Locator.
Can I do it/repair yourself/myself (DIY)?
Some of repair could be done at DIY. In case, if you needed Tools, Know-How, Time etc. Please feel to contact us. We will be happy to provide you online support.
Note: Please do not work with high voltage components. If you do not need needed/proper Tools, Know-How etc. It could be dangerous.
Mobile repair service?
In some of cases, we could also provide mobile services. Please feel to contact us where are you located and what kind of repair are you looking for.
Car not under warranty, salvage, accident, flood, modified cars?
It is highly recommended to perform repair with independent workshop to save money.
Alert still appearing after repair?
There could be many reasons. Some of reasons could be please make sure that repair was done in correct way, did you restart system after performing repair? did you Reinstall Firmware? Did you use used spare parts? Still appearing alert: Please free to Contact Us. We will be happy to provide you online support. Phone/Whats App +49(0)15226242038
When BMS_u029 triggers?
When a single groups of cells (alpha brick) is lower in voltage than the rest for period of time.
Internal Cell Failure - Self-discharging cell(s), brick
Aging Model S packs (2012-2015), High mileage
Case 1.
We heard through our network where one customer had BMS_u029 alert with healthy battery pack. He used to get back alert after reset. So he decided to turn of remote access and he did not get back alert until he turn on remote access gain. He was able to charge 100%
How to disable remote access?
disable LTE card and turn off WiFi
Slow charge
After reset, it is recommend to use slow charge (charging speed) and see progress.
Charging only to 50% for next 6-8 weeks to make sure alert does not appeared again.
Car under warranty?
In case if your car is under warranty. It is recommended to connect with OEM.
What happens when this alert occur?
This alert will not charge more than 50% SOC.
