Question 1

What is ICCU Failure (Integrated Charging Control Unit) on the Hyundai Ioniq 5?

Accepted Answer

The ICCU handles 12V charging from the high-voltage battery. Internal MOSFETs can fail due to overvoltage spikes, often blowing an internal 40A fuse and causing a total loss of 12V replenishment while driving.

Question 2

What is 12V Battery Logic & "Orange Light" Confusion on the Hyundai Ioniq 5?

Accepted Answer

The amber dashboard light indicates 12V charging. Logic bugs in early software would stop 12V maintenance if the HV battery dropped below 20%, leading to "bricked" cars even if the HV battery had plenty of charge for systems.

Question 3

What is Steering Column Knock/Clunk on the Hyundai Ioniq 5?

Accepted Answer

A known issue where a bearing in the steering column or a friction point in the roll connector causes a knock or clicking sound when turning.

Question 4

What should I check when buying a used Hyundai Ioniq 5?

Accepted Answer

CRITICAL: Verify Recall 272 (ICCU) has been performed; this includes a software update and potential ICCU/fuse replacement.

Question 5

What should I check when buying a used Hyundai Ioniq 5?

Accepted Answer

Check for the "Stop vehicle and check power supply" warning history, as this indicates a near-total 12V depletion.

Question 6

What should I check when buying a used Hyundai Ioniq 5?

Accepted Answer

Listen for a "clunk" or "knock" through the steering wheel at low speeds or when parking.

Question 7

What years was the Hyundai Ioniq 5 made?

Accepted Answer

The Hyundai Ioniq 5 was produced from 2021 to 2024.

Hyundai Ioniq 5

Ioniq 5 Reliability & Common Faults

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