VoltVitals
High — Service SoonCode: VCFRONT_a182

Low Voltage Auxiliary Battery Replacement Required

The front vehicle controller has tracked severe capacity loss or a failing internal cell within the low-voltage auxiliary accessory battery. This battery runs the vehicle's secondary computers, lighting, and safety relays, meaning an unaddressed failure here can leave the car unable to unlock or power up.

Tesla Model Y (2020+)Tesla Model 3, Model X, Model S (2017+)Tesla Model 3, Model Y (2020+)

Estimated Cost

$210

Repair Time

Less than 1 hour

Difficulty

DIY Friendly

Can I Fix This Myself?

DIY-Friendly Repair

Many owners resolve this with basic tools at home.

Tools you'll need:

OBD2 scannerMultimeterBasic hand tools

Follow the step-by-step wizard below. If the issue persists after working through all steps, it's time to schedule a professional service appointment.

Step-by-Step Fix Instructions

  1. 1

    Access the main vehicle dashboard screen and verify the active notification alert prompting a low-voltage battery replacement.

  2. 2

    Pop the front hood upper plastic intake cowl trim panels away to expose the small accessory battery bay.

  3. 3

    Use a 10mm socket wrench to carefully loosen and unclamp the negative low-voltage terminal wire block first.

  4. 4

    Unbolt the positive terminal wire link block and remove the metal retaining tie-down bracket bars holding the battery base down.

  5. 5

    Slide out the old failing AGM or specialized lithium-ion 12V battery cell housing from the front compartment shelf.

  6. 6

    Drop in a fresh identical low-voltage battery replacement unit, tighten the terminal blocks securely, and clear the dashboard codes.

Check Your Warranty Before Paying

Federal law requires EV battery warranty coverage for 8 years / 100,000 miles minimum. Many manufacturers offer 10-year coverage. An authorized dealership can confirm coverage for your VIN at no charge.

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Step-by-Step Diagnostic Wizard

Answer each question to narrow down the root cause of your VCFRONT_a182 fault.

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