2023 Hyundai Tucson Hybrid Fuel system Problems

“While traveling out of town, our 2023 Tuscon HEV with 31,000k started chugging/hesitating during acceleration. This chugging continued to worsen, so we took it to a Hyundai dealership to diagnose. We were told that fuel injector #3 was misfiring, and, as they did not have the parts in stock, that it would be safe to make the 5 hour drive back home to service the vehicle. …”

“I am reporting a critical Exhaust Gas Recirculation (EGR) valve failure on my 2023 Hyundai Tucson Hybrid. The failure resulted in an immediate loss of engine power, reduced vehicle performance, reduced fuel efficiency, and the vehicle entering limp mode while driving, creating a significant safety hazard in traffic. Diagnostic & Technical Details: Error Codes Captured: Diagnostic trouble codes in the P0400 series (EGR system flow/circuit malfunction) were confirmed during diagnostic inspection. …”

“On June 3, 2025, I experienced a terrifying and dangerous incident while driving my 2023 Hyundai Tucson Hybrid on a three-lane road at approximately 50 mph. Without any warning, the gas pedal became completely unresponsive, and the car abruptly decelerated from 50 to 20 mph. This sudden loss of acceleration was incredibly frightening, especially with vehicles close behind me that nearly collided with mine. There were no warning lights or check engine alerts. Fortunately, I was able to safely cross all lanes and pull over before having the vehicle towed to a local Hyundai dealership. …”

“Vehicle exhibits a dangerous 2-to-3-second delay/total loss of accelerator response at low speeds or rolling stops (5–15 mph). When stepping on the gas pedal to pull into traffic or make a turn, the vehicle hesitates completely before engaging power, even when the pedal is fully depressed. This creates an extreme crash risk when entering oncoming traffic or merging.”

“Unknown what fails. After driving approximately 30 minutes on a highway, car suddenly stops accelerating and bucks a bit as it slows. Must turn off car and turn it back on to accelerate again. Happens on the highway frequently. Very dangerous as there’s no way to accelerate. Only stop. It’s like it can’t find a gear and the engine revs. It happened 6 times during a 2.5 hour drive.”