2023 HYUNDAI SANTA CRUZ Engine Problems

On [XXX], I went out to start my 2023 Hyundai Santa Cruz (SC) to leave work to go home. It was difficult to start, however, it started. As I entered [XXX] , i was nearly rear ended by another car, because my SC lost all acceleration. I turned on my hazards for SAFETY and then began to try to accelerate again and was only able to get up to 45 MPH and then was turning 4,000 RPM. I limped my SC home where I had it towed to a local Hyundai dealer as it has roughly 38,000 miles. The dealership had it for 3 days, but couldn't duplicate the issue, so no repairs were done. The Hyundai Santa Cruz has KNOWN transmission issues and the fact I was nearly rear ended could've caused a nasty wreck, resulting in more damage or even a fatality. I reported the issue to Hyundai customer service on the 11th of September (Case #[XXX]). However, in the response from Hyundai, basically saying they "experiencing a high e-mail volume" and responses may be delayed. As of 9/13/2025, I have not received a call or email from Hyundai's customer service. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Received error code P030300 and the third cylinder fuel injector had to be replaced. There is approximately 36000 miles on the vehicle.

Oil filter cap oil leak problem. Typical problem with this vehicles that require attention. These defective oil leak caps are a safety and environmental concern. The engine almost starved of oil while driving on the highway. Manufacturer has been contacted and are not proactive in taking care of this defect.

My coolant reservoir was so low that there was less than 8oz of coolant left in the tank. I contacted my local Hyundai dealership and had them service my Santa Cruz. The service techs at the dealership told me that there was a known issue with some of the factory coolant reservoir caps and the seal not working correctly, thus causing coolant to flow out through the cap instead of the overflow hose. They explained that the cap's o-ring at the factory is sometimes faulty. They replaced my cap and I am still monitoring for further issues. There is no TSB listed for this "known" issue. It seems that the dealership has not reported this issue.

This is my 2nd complaint re: the same issue. Loss of power during driving. Unable to accelerate. I need to pull over shut off the engine and turn it back on.

On 3 separate occasions this has occurred . When accelerating, the engine or power train completely loses all propulsion. Twice I was starting a left hand turn and crossing oncoming traffic. On one occasion I was turning right onto a 50 MPH highway and quickly veered off the road onto the berm. The only item on dash board flashing on the third incident was the cruise control preset and it was flashing 20. At the time I was not using the cruise control and I did not set it for 20. No dash board warning lights lit during the first two losses of power. I reported it to the dealer. Today I had a maintenance appointment and inspection at the dealer. After that inspection, they informed me that they found no codes to identify the issue. I should let them know if it continues. My 3 failures happened at approximately 10,000, 15,000 and 20,000 miles. My safety and that of my passenger were most definitely affected each and every time. After 30 seconds to one minute the full functionality returns as if it never happened.

The contact owns a 2023 Hyundai Santa Cruz. The contact stated while driving approximately 65 MPH with the cruise control engaged, the vehicle started losing motive power. The contact stated that the check engine warning light was illuminated. The contact stated that the vehicle slowed to approximately 15 MPH while depressing the accelerator pedal and failed to respond as needed. The contact was able to drive the vehicle to the residence. The contact turned off the vehicle and attempted to restart the vehicle; however, the vehicle failed to restart. The contact had the vehicle towed to a dealer who diagnosed the vehicle and determined that a fuel injector had failed and needed to be replaced. The vehicle was repaired. The manufacturer was not informed of the failure. The failure mileage was 13,803.

Mileage: 13,803

Loss of power during driving No warning or warning lights vehicle would not accelerate engine speed increased only to 3k rpm’s but vehicle would not accelerate This could have been life threatening if I was in traffic Shut vehicle off and restarted problem when away From looking on forums this is an issue with the Santa Cruz

While driving the vehicle during winter the temperature of the engine dropped due to thermostat failure leading to no heat in the cabin and a check engine light. Vehicle was towed to the dealer as this failure can cause both engine damage and is unsafe for the occupants in freezing temperatures.

Rough Idle, Loss of engine power, and cylinder misfire on 2023 Santa Cruize Limited approx. 26,700 miles(currently) purchased new 04-28-2023 at Hyundai in North Knoxville, TN. Vehicle is stored in insulated garage at all times when not in use. 1) Approx. 2k-4k mi vehicle was having rough idling upon start up & have to sit, wait several minutes to allow vehicle ample time to warm up like a cold natured, carbureted engine. Dealer was unable to replicate at vehicle service intervals(60 miles away from home). 2) During Oct 23 approx. 24k-25k experienced 3 occurrences of loss of power while accelerating to merge into traffic, toggled through drive modes, put in manual, then back. Power came back each time. 3) 11/12/2023 Second start of the day, immediately upon startup was running extremely rough in idle, very little response. Check engine light is on, made video of issue & documented miles: 26,121. Turned off, then back on, issue was resolved. 4) 11/15/2023 26,373 miles: Second start of the day, same issue described in "#3", extremely rough idle, check engine light, & sounds coming from tailpipe that can be identified as "drone". Opened hood, inspected intake components, removed engine cover to check for burned or odd colored wires to injectors & coil packs, but no evidence of fouled or damaged wires. Turned vehicle off, then back on & the issue cleared. Contacted dealer where purchased, advised to bring vehicle in for diagnostic evaluation. 5) 11/16/2023 26,606 miles: Again, second start of the day, check engine light, extremely rough idle & louder "drone" sound. Left vehicle in the state that it was in, drove to dealer from work(25miles away) to be diagnosed while issues were occurring. While driving vehicle had very little power, experienced odor while driving, shudder, & jolting during accelerations. Diagnostic eval. revealed misfire in cylinder #3, dealer inspected coil packs, wires, & removed spark plug. Currently being serviced, issued loaner by dealer.

Vehicle has multiple engine misfires, resulting from faulty fuel injectors. Unable to maintain speed, vehicle controls become hard to control due to vehicles engine misfires. Vehicle has less ten 20,000 miles. Dealership unable to obtain new fuel injectors due to manufacture not having supply. Vehicle in shop longer for 30 days. Contacted Hyundai USA told that Hyundai knows about problem but has so plan to rectify situation.

Car will not start properly and shuts itself off after which a strong odor of burning plastic is present in the vehicle. It will periodically do this almost once a day if not every other day. I have taken it in to the dealer 4 times last time they had my car for two weeks and could not replicate porblem because they only drive it 5 miles and it will not happen unless vehicle is being daily driven. I have found numerous other owners with the same complaint. Hyundai will not authorize shop to work on car and advises them to release it to me each time. They only attempted to fix once and gave it back to me all over times. The car is at the dealer again and they will not work on it till october to try to find the problem again. I will not drive this car due to risk of car deciding to turn it self off or start on fire due to whatever is melting when this happenns car is still at red mcombs northwest as of today.

My issue was that I would press the gas pedal, but once I got to 20 mph the engine would stop giving power and I couldn’t get up to speed. My top speed was 30 mph, even though I would give it gas to speed up. This was the worst after I would come to a stop at a traffic light. As I pressed the gas to gain speed, it would struggle to gain speed in the middle of the intersection, causing the cars behind me to be frustrated and aggressively tailgate. I was able to find a parking lot, parked and turned the car off for approximately 20 minutes. After that I turned the car back on, I went for a test drive and there was no problem at all. When this all happened no warning lights came on. Very concerned that this will happen again, as I have no clue what triggered this incident. I have reported this to my dealer, but as this just happened today nothing has been inspected.

The contact owns a 2023 Hyundai Santa Cruz. The contact stated while slowing down at approximately 25 MPH, the vehicle downshifted roughly and would jolt while shifting into gear. The contact stated that the failure had been occurring intermittently. Additionally, the contact stated that the RPMs would remain high while he was at a complete stop. The contact stated that the RPMs would rise above 3,000 RPM while depressing the brake pedal, and he would turn the vehicle off to stop the engine from revving. There was no warning light illuminated. The contact had taken the vehicle to a local dealer, where it was diagnosed that the throttle body needed to be replaced. The part was replaced; however, the failure persisted. The vehicle was taken back to the same dealer. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 4,000. The contact stated that the information in this complaint is inaccurate. The manufacturer has resolved the issue now so the contact would like to withdraw this complaint.

Mileage: 4,000

Coolant leaking onto engine shield and ground from front a small rock that hit of vehicle radiator. The radiator is not nearly shielded well enough to protect it from rocks and other debris. A 1/4 inch diameter rock struck the front of radiator through grill opening resulting in a leak and possible risk of overheating the engine. The radiator tube size is also made of extremely insufficient material to withstand any impacts. Hyundai dealer and corporate at this time refuse to take any responsibility for this issue and will not warranty the replacement. The car is a 3 month old 2023 Santa Cruz Limited with just over 3,000 miles on it. This is an extremely common issue with a quick google search of the 2022-2023 Santa Cruz.

The car has 1,360 miles and is only a month old since I bought it. Car sat for 8 hours at my work parking lot. When I went to start it it ran rough like an engine misfire for about 10 seconds then normal. When I drove off with engine cold... the transmission would not shift up and was at 4,000 rpms. The accelerator pedal was not responsive.. even flooring it yielded no acceleration and the car would not go over 25mph. No check engine lights or trouble lights. I was able to put the automatic into paddle shift mode but the car still did not want to accelerate and when it did it seemed to get stuck at 3500-4000 rpm and no accelerator input. Shut the car off then back on again after I pulled over because the car would not accelerate. - now it is fine with no issues it seems like. Took to the dealer and they could not recreate the issue .. no trouble codes or open flash information available for a fix.

Brand new. I hit the gas trying to pull out onto a busy road and I couldn't go above 30-40Mph. The RPMs went up but the car would not accelerate. I pulled onto a slower road and tried changing gears manually, and different drive modes such as sport or snow. The problem persisted. I shut the vehicle/engine off and started it back up. Everything ran perfect after that. I googled "Hyundai Santa Cruz No Power" and came across dozens of post of the 2022 and 2023 model experiencing the same thing. Like me, no warning lights or codes came up on the dash or the smart app which reports errors. This could cause an accident if someone was behind me.

Joined a Santa Cruz Owners blog immediately after purchase. This safety defect involves BOTH the 2022 and 2023 - ALL models. The front grill (especially the lower section) has no mesh and the openings are too big. Road debris entering this area can disable the Engine Cooling System and/or the vehicles Air Conditioning System. A protective mesh or screen has to be designed by Hyundai, to fit behind the grill, to deflect large rocks and objects that could disable the motor.