NHTSA Complaint #11663285 — 2022 HYUNDAI TUCSON

While driving home on the freeway in stop-go traffic, the check engine light suddenly came on. At idle and low speed, the engine ran very rough with lots of vibration and acceleration became difficult. I got off the freeway as soon as possible to take surface streets as I felt unsafe continuing to drive on the freeway. The car continued to vibrate significantly. This happened very close to home and I was able to get home but slowly. When the car cooled down I checked the fluid levels - oil was fine and clear but coolant level was low despite a recent service where a coolant flush was performed and the coolant level was at the minimum level indicated by the reservoir. The dealer performed a test and the fuel injector unit for cylinder 3 failed. Apparently there is no observable coolant leak. The car is now awaiting repair under warranty, but the part is not available for 8 weeks. The dealer intends to replace the failed injector when the part arrives.