2018 Hyundai Ioniq - Throttle does not work plus check brakes warning

car starts but when i step on gas pedal, even to the floor, it only idles along. the “Check Brakes” light came on.

2018 Hyundai Ioniq Electric Recalls

Electrical system: software


Report Date:
DEC 06, 2021

Vehicles Affected:


Unexpected acceleration following gas pedal release can increase the risk of a crash.

What You Should Do:
Dealers will update the EPCU (Electric Power Control Unit) software and repair the ground wiring, free of charge. Owner notification letters were mailed February 9, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai’s number for this recall is 215.

Hyundai Motor America (Hyundai) is recalling certain 2017-2019 Ioniq electric vehicles. An unstable electrical ground may cause the vehicle to enter a fail-safe mode with reduced acceleration and power. In certain conditions while in fail-safe mode, the vehicle may accelerate after the gas pedal is released.

To see if your specific vehicle is affected
Enter Your VIN


Good post above. Also ask your shop to scan for engine & brake codes, post them here, might get some more ideas. It may be that the brake problem is the actual culprit here, some sort of fail-safe is occurring b/c the computer thinks the brake system problem makes the car unsafe to drive.

There may be a problem with the accelerator pedal position sensor.

The brake light is another issue.