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Warning — Address SoonCode: P0A12

EV Battery Cooling Fan Performance Fault

The vehicle control computer has detected an open circuit, low voltage draw, or complete hardware failure within the auxiliary electric fan network tasked with cooling the main battery pack array. Without this fan pushing air, battery cell temperatures can quickly climb during rapid charging sessions.

Hyundai Ioniq 5 (2022+)Tesla Model 3, Model X, Model S (2017+)Tesla, Hyundai Model 3, IONIQ 5 (2020+)

Estimated Cost

$460

Repair Time

2-3 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

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Step-by-Step Fix Instructions

  1. 1

    Use an advanced OBD-II diagnostic scan tool to command a manual override function test on the battery fan system.

  2. 2

    Clear away road leaves, plastic bags, or debris blocking the lower front bumper active cooling air louvers.

  3. 3

    Pop the low-voltage engine bay relay box panel and replace any blown cooling fan circuit fuses.

  4. 4

    Track the wiring loom running down to the cooling fan shroud to search for loose chassis grounding lugs.

  5. 5

    Unplug the multi-pin connection directly at the fan frame and check for 12-volt battery power delivery.

  6. 6

    Remove the lower trim panels to pull out and replace the faulty electric battery pack forced-air cooling fan motor unit.

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Step-by-Step Diagnostic Wizard

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