Hyundai Tucson electrical problems

The vehicle unexpectedly entered 'Limp Mode' due to engine tracking code P1326. The vehicle severely restricts engine power and RPMs while driving on public roads, preventing normal acceleration. This creates a severe safety hazard as the vehicle cannot safely merge into oncoming traffic, accelerate away from intersections, or maintain basic road speeds, putting me at a high risk of being rear-ended.The fault is under Hyundai Theta II Txxm. I have been given the runaround by both hyunday corporate and the local dealer.

Sudden uncommanded high engine revving 4000 rpm with loss of forward acceleration while driving. ISG (Idle Stop n Go) indicator on dashboard turned yellow and system could not manually override. Vehicle was turned off. After car turned back on after about 30 minutes It entered a Protective Limp Home Mode, which cleared the systems. All seemed back to normal. It was advised to have vehicle towed to the dealer where purchased. The vehicle has only 4,000 miles and 9 months old. To date the dealer could not replicate the malfunction and could not find any abnormalities In the codes.

The contact owns a 2022 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the right turn signal indicator light failed to illuminate on the instrument panel upon depressing the turn signal lever to make a right turn. No warning lights illuminated. Additionally, upon depressing the turn signal lever to make a left turn, the left turn signal indicator light failed to illuminate. The contact stated that the failure progressed. While driving at various speeds, the brake lights failed to illuminate when the brake pedal was depressed. The vehicle was taken to an independent mechanic, where it was diagnosed that the wiring harness needed to be replaced. The vehicle was repaired. The contact associated the failure with NHTSA Campaign Number: 25V893000 (Trailer Hitches); however, the VIN was not included in the recall. The dealer and the manufacturer were notified of the failure, and a case was filed. The failure mileage was approximately 69,000.

The contact owns a 2022 Hyundai Tucson. The contact stated while driving at an undisclosed speed, several unknown warning lights illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed with ECU software error. The contact was advised to contact the dealer. The dealer was made aware of the failure and advised the contact to report the failure to the NHTSA Hotline. The contact referenced an unknown recall; however, the VIN was not associated with a recall related to the failure. The manufacturer was not made aware of the failure. The failure mileage was approximately 108,565.

Two instances of the center screen malfunctioning. One was an intermittent blip of the screen turning black and then turning back on while driving. Additionally, during this same instance of the intermittent blip of the screen turning off for about 3 seconds, my headlights which are set to auto also turned off while I was driving at night and then blipped back on when the screen came back at the same time. Second instance, the center screen was black and never came on when the car was initially turned on and the screen remained black for the entirety of my drive until the car was fully turned off and then back on. Yes, this is available for inspection upon request. Safety was put at risk by losing headlight visibility at night highly increasing the chances of an accident as well as losing important carplay navigational directions on center screen. Problem has been reproduced as these issues both occurred within one week (the week of August 16-23, 2026). The vehicle has not been inspected. During the time of both events there were no warning lamps or messages that appeared.

My wife was driving my SUV while I was a passenger. We were in the left lane, and put the left turn signal on while traveling south bound approaching an intersection to take a left turn (traveling approximately 3-5 Miles Per Hour and slowing) at the traffic light (traffic light was green). There was a car in front of us that had stopped waiting for oncoming traffic to clear and make the same left turn onto the same road as us. While traveling in this lane we hit a deep pot hole (not very visible while driving), just as we were approaching the vehicle stopped in front of us. When hitting the pot hole, our SUV seemed to leap forward a bit and when the brakes were applied to slow and stop, the braking system failed (appeared to freeze) and the brakes did not work, and because the braking didn’t work, our vehicle hit the car in front of us. Prior to and after hitting the pothole, no audible warning sounds or visible alerts appeared and no emergency braking was activated. The airbags in our vehicle never deployed. Our safety (my wife and I) as well as the safety of the 2 passengers in the other vehicle were at risk as we all could have been injured in the accident. As we needed the vehicle for transportation, we immediately began filing all the necessary police and insurance reports and brought our vehicle into an Auto Body Repair Shop to be repaired the next day. During the repair work, some of the responsible components may or may not have been replaced and the Auto Body Repair Shop also had all the car sensors recalibrated by a 3rd party, which is why we did not bring the car to a dealership to evaluate. To the best of our knowledge, the manufacturer, the police and the insurance company did not inspect the vehicle. We are not experts, but hitting a pothole might be considered an edge case, so I’m not sure that a dealership would have tried or been able to replicate the issue.

The instrument cluster malfunctioned suddenly leaving the control panel completely black (no odometer, speedometer, speed range, turn signal indicators, etc.). The driver was therefore unable to know what speed they were driving, how much fuel remained, and lacked any sort of signal that turn signals/blinkers were on or off. It was unsafe to drive and impossible to accurately comply with legal speed limits. Local Hyundai dealership inspected the car and confirmed that the cluster had to be replaced, which they did (required 11 total days of being unable to use the car).

COMPONENT: Infotainment main display screen. Still installed and available for inspection. FAILURE: The screen intermittently flickers, then goes blank with static. Occurs at unpredictable intervals including while driving. Ongoing and unrepaired. SAFETY RISK: The display is centered in the dashboard and houses the backup camera and vehicle controls. Flickering and static while driving creates a visual distraction, and the backup camera is unavailable when the screen goes blank. The malfunction now occurs often enough that it interferes with normal driving. REPRODUCED BY DEALER: Not reproduced during any service visit. Reported to three Hyundai dealerships: Pedder Hyundai, San Diego (May 2025): could not replicate, but accepted my video evidence and ordered parts. I relocated before the repair was completed. Hyundai Mountain View, CA ([XXX]): could not replicate. Declined to perform a diagnostic or open a warranty claim despite the same video evidence. Stevens Creek Hyundai, Santa Clara (Invoice [XXX], Aug 18-20 2026): road tested, unable to verify. Found stored code c2a2397, history in front camera menu. Infotainment software at current level. Road tested 94 miles without recurrence. Technician wrote: "If issue re-occurs, we recommend returning the vehicle to us for further diagnosis." No cause identified, no repair performed. Charged $315. I have provided video of the screen failing while driving to the dealerships and to Hyundai Motor America. INSPECTED BY MANUFACTURER: Inspected by the three dealerships above. Case opened with Hyundai Motor America Consumer Assistance in June 2026, unresolved with no written determination. Not inspected by police or insurance. WARNING LAMPS: None. No dashboard messages accompany the failure and it occurs without prior indication. First observed approximately May 2025, within weeks of delivery (delivered [XXX]). Current mileage 21,389. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

This problem was observed about 1 month ago: While driving and headlights set on AUTO, during the day, and the light switch NOT on, the dashboard would indicate the lights were ON, for just a second or two, and would go off. At night with the headlights set on AUTO and the headlights ON, while driving, the headlights go OFF and ON briefly (1-3 seconds) causing a dangerous situation as visibility of road is lost. This condition was initially observed at night, after using the turn signals (left/right), but is now happening with greater frequency while driving without using turn signals. I Will schedule a visit with dealership to report/confirm problem.

The contact owns a 2022 Hyundai Tucson. The contact stated that the check engine warning light illuminated and was cleared; however, the warning light returned hours or days later. The dealer had cleared the check engine warning light approximately 15-16 times. The vehicle occasionally stalled while driving at various speeds. The dealer diagnosed the vehicle with terminal engine failure. The contact was informed that the fuel system needed to be overhauled, and the fuel injectors and caps needed to be replaced. The vehicle was repaired twice. The failure persisted after the contact had confirmed the diagnosis with a certified mechanic. The vehicle was returned to the dealer, who replaced the engine. The vehicle was parked for several hours, and the contact attempted to turn on the headlights, but the headlights failed to illuminate. While driving the vehicle, the vehicle hesitated several times. The following day, the vehicle failed to start approximately four times. The vehicle was driven to the dealer but hesitated several times along the way and failed to start once at the dealer. The dealer diagnosed the vehicle and determined that the battery and other parts needed to be replaced; however, the vehicle was not repaired. The manufacturer was made aware of the failure, and a complaint was filed. The failure mileage was 3,212.