Jan 3, 2026Transmission & drivetrainElectrical systemEngine
The vehicle exhibits a dangerous electrical defect involving uncontrolled power-cycling. After shutting down the car, it automatically restarts itself in a continuous loop. During these episodes, the dashboard flickers, the drivetrain shudders, and the vehicle becomes unresponsive to manual 'Stop' button or brake inputs. Most critically, the car autostarts while parked in an enclosed garage. As a Plug-in Hybrid (PHEV), once the EV battery depletes, the internal combustion engine (ICE) engages automatically. This creates a life-threatening risk of Carbon Monoxide (CO) poisoning for residents in the connected home. A Honda dealership has professionally diagnosed the cause as a failure of the Body Control Module (BCM). This module failure also causes the anti-theft alarm to trigger uncontrollably and renders the keyless entry system inoperable. This defect turned the vehicle into a life-safety hazard in a residential setting. Visual documentation of the uncontrolled power-cycling and dashboard flickering can be viewed at: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA ODI 11708588
Mar 25, 2023Transmission & drivetrainEngine
The engine revs very high and the car dramatically slows down. This has happened three times (including today) in the two years I have owned the car. Once was extremely dangerous as it happened on an Interstate highway when traffic was at highway speeds. We were able to avoid getting in an accident though. Why is there no recall for this common problem with this car?
NHTSA ODI 11513787
Nov 29, 2022Transmission & drivetrainEngineFuel system
While driving home at night I exited the 60 Freeway and turned right to go up a hill. The car would not move forward and I had to pull over. I noticed the battery indicator had 1 bar on it and the engine revved but the car would not go. After waiting the battery got recharged and we were able to complete our trip. I believe we were at risk due to the car slowing so suddenly it could have resulted in being rear ended. The car has not been taken yet to a dealer for this issue or been inspected by anyone. There were no warning lights or sounds from the car. This is second time this has happened in similar circumstances.
NHTSA ODI 11495376
Feb 24, 2021Electrical systemEngine
TL* THE CONTACT OWNS A 2018 HONDA CLARITY. THE CONTACT STATED WHILE DRIVING AT 45 MPH, THE RPM'S REVVED UP ABNORMALLY. THE CONTACT ASSOCIATED THE FAILURE WITH THE VEHICLE RUNNING OUT OF ELECTRICAL VEHICLE RANGE. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO CHARLIE'S HONDA (448 WESTERN AVE, AUGUSTA, ME 04330) WHERE IT WAS DIAGNOSED WITH NO FAILURE. THE CONTACT MENTIONED THAT HE HAD THE TRANSMISSION FLUID CHANGED HOWEVER, THE FAILURE OCCURRED. THE MANUFACTURER HAD NOT BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 60,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI 11397702