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Warning — Address SoonCode: CHG_f034

DC Fast Charging Performance Degraded

The vehicle has restricted DC fast-charging speeds due to an identified issue inside the fast-charging safety control line. While you can safely charge at standard rates using your home AC wall box, fast charging at public stations will run at deeply throttled speeds.

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

Estimated Cost

$850

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

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

    Peer directly into the lower CCS/NACS fast-charge terminal slots for melted plastic or dirt.

  2. 2

    Move to a completely different public fast-charging post to eliminate station hardware faults.

  3. 3

    Run an automated cooling system air purge via the service menu to verify the battery cooling loops are functional.

  4. 4

    Access inner port trim layers and measure resistance across the high-voltage charge port temperature sensors.

  5. 5

    Replace the high-voltage internal charge port bus bar assemblies showing signs of structural heating.

  6. 6

    Replace the entire high-voltage charge port terminal assembly and its linked direct-current cables.

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Step-by-Step Diagnostic Wizard

Answer each question to narrow down the root cause of your CHG_f034 fault.

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