Mazda CX-90 check engine light comes on

Filed Sep 20, 2026 · Electrical, Engine · PA

My boyfriend and I rented the car from Hertz Car Rental in [XXX] on Labor Day weekend. Within moments of driving the car off the lot, the safety camera system stopped working and the lights came on saying they weren’t working. The touch screen also started glitching and intermittently working but we didn’t think too much about it. We started driving across the state to [XXX] and made it about 4 hours away from [XXX] when the car started making a noise like a marble in a tin can, lost power, started shaking, and could not make it up hills at a safe speed. The check engine light came on. We pulled over and popped the hood to find a lot of rat feces scattered all over the engine bay, some of it looked fresh and some was turning white telling us it was there for a while. We called the Hertz rental roadside assistance who could not help us as they rented out all of their cars for the weekend and our only options were to tow us back to [XXX] without a replacement car or try to continue driving it the 1 hour to our destination. We continued to drive the car as we did not have anywhere else to stay and were in the middle of nowhere. We drove the car slowly to our destination but it did keep making the noise and shaking although the check engine light went out. When I got out of the car, I noticed a raw gas oder which worried me. I called my dad who works on cars and he told me not to drive it any farther as it could be a serious safety risk as the rats likely have been chewing wires and hoses and there could be a fire risk. We were also breathing the rat feces in our whole trip unknowingly. We called for the car to be towed and paid to rent another from another company. Since then, we have not gotten any money back and they continue to charge us daily for the car saying we must return it, meaning they have no record of where there car is even though we watched it be towed away and talked to the driver who said he was taking it to the Grand Junction Airport. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT

Filed Sep 7, 2026 · Engine · CA

Vehicle has 43,000 miles and the radiator has failed. Engine light goes off and on about high engine temperature and limits acceleration. Lost acceleration on freeway and was forced to get off on the freeway shoulder. The temperature gauge jumps from normal to high. Engine was extremely hot and potentially a burn hazard when I opened the hood. I've researched Mazda CX-90 owner's online forums and this radiator failure is happening to the 2024 model with several owners just out of warranty stating leaks spraying engine area. My vehicle has the same green coolant spray dried on the water hoses that many other owners have experienced.

Filed Jul 9, 2026 · Electrical, Engine · 29,000 miles · LA

The contact owns a 2024 Mazda CX-90. The contact stated that while operating the vehicle, several warning messages were displayed on the instrument panel, including the electronic stability control and the check engine warning lights. Later, while driving, the power steering failed, causing the steering wheel to become difficult to turn in either direction. The vehicle was driven to a local dealer, who was unable to determine the cause of the failures. The contact was informed that the battery would not remain charged. The manufacturer was not yet contacted. The failure mileage was 29,000.

Filed Jun 30, 2026 · Electrical, Engine · MT

There was a recall issued within the last year for my make and model vehicle, in March 2026, it was fixed when my car was towed to a Mazda dealership due to a check engine light and "hybrid engine malfunction". On June 24, 2026, the vehicle went into limp mode, the error message resolved upon turning off the vehicle. There were no check engine lights that appeared. On June 25, 2026, the vehicle went into limp mode on I-5 in traffic. We were able to safely get the vehicle to a safe location out of traffic. The error code on dash was "hybrid engine malfunction" again. The radiator was replaced at a second Mazda dealership, we were told "that should fix the problem". There was no indication the radiator needed replaced due to no fluids leaking and no overheating of the vehicle. The battery did fail during this visit. On June 26, 2026, when we were on I-90 in traffic again, the vehicle went into limp mode again with the same hybrid engine malfunction warning. The vehicle was towed to a third Mazda dealership to finally have the hybrid battery finally replaced. The only warnings were when we went into limp mode, no dash lights or check engine lights, nor overheating. The safety of my family was put at risk due to the vehicle decelerating from 75 mph to 35 mph in the fast lane of traffic twice. Mazda has done all service repairs and recalls.

Filed Apr 29, 2026 · Brakes, Driver assistance · MD

1) What component or system failed? The issue appears to involve the vehicle’s electrical system and hybrid system, as well as brake-related electronic systems. The vehicle displayed multiple warnings including “Hybrid System Malfunction” and “Critical Vehicle Malfunction.” The electronic parking brake system was also affected during the incident, including a situation where the brake could not be released while the vehicle was in motion. The affected components are available for inspection upon request. 2) How was safety put at risk? Safety was put at risk because the malfunction occurred while driving and involved critical system warnings and brake-related issues, including the inability to release the electronic parking brake. The sudden appearance of a “Critical Vehicle Malfunction” warning during operation created concern about potential loss of vehicle control and safe braking capability in traffic. 3) Has the problem been reproduced or confirmed by a dealer? The issue has not been fully resolved. The vehicle previously underwent service for a high-voltage hybrid battery replacement, but the current symptoms continue to occur repeatedly. The problem has not yet been confirmed as permanently resolved by the dealer. 4) Has the vehicle been inspected by manufacturer, police, insurance, etc.? UNKNOWN 5) Were there warning lamps or symptoms before failure? Yes. Over the past two weeks, multiple warning lights and messages have appeared almost daily, including: Check Engine Light Hybrid System Malfunction i-Stop malfunction Intermittent brake / electronic parking brake warnings A “Critical Vehicle Malfunction” warning occurred once while driving, along with multiple simultaneous alerts. These warnings sometimes disappear after restarting the vehicle but consistently reappear during normal driving.

Filed Apr 13, 2026 · Electrical, Engine · 56,050 miles · FL

The contact owns a 2024 Mazda CX-90. The contact was informed about a previous recall associated with the steering that was repaired prior to owning the vehicle, but the failure persisted. The contact stated that while driving on several occasions at various speeds and turning, the steering wheel jerked in the opposite direction, then became soft, and then more difficult to steer. The vehicle was not diagnosed or repaired, but the contact was informed of a steering investigation. On another occasion, the contact stated that when the vehicle was stopped and the ON/OFF feature was activated. There was an abnormal knocking sound coming from the engine compartment. The contact stated that after turning off and restarting the vehicle, and after refueling the vehicle, the messages "Engine Malfunction – Inspect Vehicle" and "Hybrid System Malfunction" was displayed. The check engine warning light was illuminated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was 56,050.

Filed Mar 26, 2026 · Electrical, Transmission · MI

Started the car to go to work and the check engine light came on, I stop started flashing and wouldn’t turn off. Message says there is a malfunction with the hybrid system and to visit Mazda dealer. I had to drive it to work, so it drove fine. But the lights never went off.

Filed Dec 11, 2025 · Electrical, Engine · AL

My new Mazda CX-90 failed to restart after being stopped at a stop sign. After restarting manually, the dash displayed the check engine light and the “i-stop malfunction” light. The car now flashes this warning whenever it is on. There is an open recall for this issue (24V‑816) but my local Mazda dealer does not pull anything up when they search my VIN. It appears the recall only applies to these vehicles built between 12/23 and 4/24. My car was built in 11/23. I believe this recall should be expanded to included more vehicles like mine.

Filed Apr 24, 2025 · Electrical, Engine · CT

Brought vehicle into Dealer for Service due to Check Engine Light being on and Notification of a Malfunction of the I-Stop System. Service Tech indicates that this is a known issue with the Hybrid Battery in these vehicles that could cause the vehicle to unexpectedly stall. This safety issue is significant enough that they would not let us take our car home while we wait for them to obtain a battery, which are currently on backorder. Pursuant to a conversation with a Mazda Customer Experience Representative this has been a known issue since at least January. We have not received any correspondence from Mazda regarding this issue. It would appear that a Bulletin or Recall is warranted for what appears to be a prevalent issue with significant safety impacts.

Filed Dec 25, 2024 · Transmission · OH

I am writing to formally raise a safety concern regarding my Mazda CX-90 Turbo S Premium Plus, which I purchased and currently have approximately 25,078 miles on. This vehicle is equipped with a mild hybrid 48V battery, which is not a full high-voltage battery. The vehicle has been at the dealer since December 9th for ongoing issues. On [XXX], I began experiencing multiple malfunctions, including the Mild Hybrid System Malfunction, Engine Malfunction, and iStop Malfunction (with the iStop malfunction indicator blinking). This is a serious safety concern. I was extremely worried that the vehicle could stall, especially while driving on a busy highway at high speeds. Both myself and my family felt fearful while driving the car. I believe this issue presents a significant risk to the safety of drivers and passengers. I am requesting your assistance in initiating an official recall from the manufacturer for this component failure. Based on my research, I am not the only one experiencing these issues—many others have reported similar problems on forums like Reddit, which suggests that this could be a widespread issue. Additionally, Mazda offers a 6-year/60,000-mile warranty on this hybrid battery. If the component fails after this period, the cost to replace it could reach $6,000, with the customer being responsible for a large portion of the expense. This is concerning, especially considering that if this part fails after 30,000 miles, the customer may be expected to bear up to 70% of the cost. It is frustrating to see such issues with a vehicle sold in the U.S., and I feel that companies should be held accountable for offering subpar products. For comparison, BMW offers a 100,000-mile warranty on similar components. I hope you will take immediate action to address this issue and help ensure that affected vehicles are recalled for repair or replacement. Thank you in advance for your attention to this matter. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)