2021 Audi e-tron Charging Tips with Mobile Charger TSB

Owners of the 2021 Audi e-tron may encounter situations where their vehicle isn't charging as expected with the Audi mobile charger. This could manifest as the vehicle not charging at all or charging at a slower rate than anticipated. This technical service bulletin (TSB) provides important instructions on how to properly set up and use your Audi mobile charger to ensure optimal charging performance on both 110V and 240V outlets.

Understanding the correct charge rate settings for your specific outlet type is crucial. The Audi mobile charger has a "last mode" feature, meaning it remembers the previous charge rate setting. If this setting doesn't match the current outlet's capabilities, it can lead to charging problems for your 2021 Audi e-tron.

Symptoms

Owners of a 2021 Audi e-tron might experience the following symptoms related to charging:

• The vehicle does not charge when connected to a 110V outlet.
• The vehicle charges at a significantly reduced rate when connected to a 240V outlet.
• The vehicle does not charge at the expected rate when switching between different 240V outlets with varying amperage capabilities.

These issues typically stem from an incorrect charge rate setting on the Audi mobile charger itself, not a fault with the vehicle's charging system.

Fault Codes / DTCs

This technical service bulletin does not list any specific Diagnostic Trouble Codes (DTCs) or fault codes. The issues described are related to user configuration of the Audi mobile charger rather than internal vehicle system faults that would trigger a DTC.

What the Service Bulletin Says

Technical Service Bulletin 93 20 29 2059257/1 provides guidance on adjusting the charge rate for the Audi mobile charger based on the type of electrical outlet used. For 110V outlets, the mobile charger must be set to a 100% charge rate; if it's set to 50%, the vehicle will not charge. For 240V outlets, the recommended charge rate depends on the outlet's amperage capability. If the 240V outlet is rated 50 amps or higher, the charger can be set to 100%. However, if the outlet is rated less than 50 amps, the charge rate needs to be set to 50%.

The bulletin also highlights the "last mode" feature of the Audi mobile charger, which retains the previous charge rate setting. This means if you charge your 2021 Audi e-tron at a lower rate on one outlet, it will default to that rate on the next, potentially leading to slow or no charging if the new outlet can handle a higher rate. It also advises ensuring that Campaigns 57H3 and 93G1 have been performed for proper charging function under all conditions.

What to Do

If you own a 2021 Audi e-tron and are experiencing charging difficulties with your Audi mobile charger, follow these steps:

1. Check 110V Outlet Settings: If using a 110V outlet, ensure your Audi mobile charger is set to a 100% charge rate. If it's at 50%, your vehicle will not charge.
2. Check 240V Outlet Settings: For 240V outlets, determine the amperage capability of the outlet. If it's 50 amps or more, set the Audi mobile charger to 100%. If it's less than 50 amps, set it to 50%.
3. Adjust Charge Rate: To change the charge rate on your Audi mobile charger, press button "A" (as shown in the TSB) for approximately 3 seconds until the desired charge rate is selected.
4. Verify Campaigns: Confirm with your Audi dealership that Campaigns 57H3 and 93G1 have been performed on your vehicle. These campaigns are important for ensuring optimal charging functionality.

By correctly configuring your Audi mobile charger, you can resolve most charging issues and ensure your 2021 Audi e-tron charges efficiently.

Source: NHTSA ID 10176426, TSB 93 20 29 2059257/1