At 3200 miles the vehicle had a major powertrain malfunction causing the vehicle to throw multiple error codes - Hybrid System Malfunction; Charging System Malfunction; Electrical Leakage Detected. Was instructed to pull over to a safe area immediately. Was unclear how long car would continue to be drivable. Once car stopped it became completely immobile. Repeated restart attempts would not let vehicle start ICE engine or shift into gear. Had to be towed via dollies to nearest dealer for diagnosis and repair. Dealer found a failed PTC heater unit as source of problem and replaced it (Mazda part- KMV6-61-FHX). Vehicle is once again drivable, but the dealer has no idea what would cause the unit to fail and how to avoid future problems. Dealer has heard about this with many vehicles and repaired several similarly. We are fortunate to have found a safe place to pull off the road before powertrain shutdown, but if not we would have been stuck on the road with no ability to move the vehicle and occupants to safety. I hope the federal safety agency can investigate whether a recall of that part or the software that controls it is needed. the federal safety agency should also look into the failure mode of the vehicle to see if a different approach is safer and more appropriate.
2024 Mazda CX-90 Plug-In Hybrid fuel system complaints
Page 2 of 2: complaints 11 to 14 of 14, newest first, as owners wrote them.
What component or system failed or malfunctioned, and is it available for inspection upon request? "Hybrid System Malfunction. Stop Vehicle in a Safe Location." Car completely inoperable. Had to tow to dealership as would not start or go out of park. Hybrid and High Voltage battery issues reported by multiple owners. This happened less than a month into owning the vehicle and with less than 1200 miles. How was your safety or the safety of others put at risk? Car deceleration on highway specific to this error reported by multiple owners. Has the problem been reproduced or confirmed by a dealer or independent service center? Uknown. Currently being serviced by dealer. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Currently being inspected by the Mazda dealership I leased the vehicle through. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? "Yes, just a week into having the vehicle (at 300 miles) a "Hybrid System Malfunction" error message appeared to "Have the Vehicle Inspected." Dealership had it in their Service shop for over 2.5 weeks and said nothing was wrong with it.
Started the vehicle and got the message "Hybrid system Malfunction. Have the vehicle inspected". Vehicle was shaking and would not go above 30 MPH.
I was driving on the freeway on the fast lane and the vehicle slowed from 65mph to zero in about 30 seconds and came to a complete stop. It happened so fast I couldn’t change lanes to get to a safe spot. I was left stranded on the fast lane of the freeway with traffic coming right at me. Vehicle displayed a Hybrid system malfunction message.
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