VoltVitals
Warning — Address SoonCode: BRK_a024

Regenerative Braking Control Fault Active

The vehicle's braking controller has logged an electrical fault that restricts or completely turns off regenerative braking. Because kinetic energy can no longer be converted back into battery charge, the vehicle relies solely on its mechanical friction brakes, altering brake pedal feel.

Nissan Leaf (2011+)Chevrolet Bolt EV (2017+)Tesla Model 3, Model X, Model S (2017+)Tesla, Nissan, Chevrolet Model 3, Leaf, Bolt EV (2020+)

Estimated Cost

$1,150

Repair Time

2-4 hours

Difficulty

Shop Recommended

Can I Fix This Myself?

Professional Service Recommended

This repair involves high-voltage components or specialized equipment.

What professionals will use:

Professional scan toolHydraulic liftHigh-voltage safety PPE

Use the diagnostic wizard below to gather information for your mechanic, then find a local EV specialist using the ad below.

Step-by-Step Fix Instructions

  1. 1

    Clean front and rear wheel hubs to eliminate metal shavings blocking wheel speed sensors.

  2. 2

    Check for separate traction control or ABS dashboard fault lights that are masking braking issues.

  3. 3

    Perform a full vehicle power-down sequence via the settings menu for 20 minutes to reset safety loops.

  4. 4

    Check low-voltage wiring harnesses leading directly down into the electronic brake booster unit.

  5. 5

    Replace a faulty wheel speed sensor or damaged wheel speed tone ring on the wheel hub assembly.

  6. 6

    Replace the central electro-hydraulic brake booster master cylinder module and bleed the hydraulic fluid lines.

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Step-by-Step Diagnostic Wizard

Answer each question to narrow down the root cause of your BRK_a024 fault.

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