2018 Honda Clarity problems

“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]”

“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?”

“Since last Wed. (9/24/2025), the car started to show the warnings of "Adaptive Cruise Control Problem", "Brake Hold System Problem", "Brake System Problem", "Electric Parking Brake Problem", and "Road Departure Mitigation System Problem" from time to time. I bought this VHonda Clarity Plug-in Hybrid 2018 in June 2023 as the HoneTrue Certified. Then probably the same time, the car lose the EV mode by itself, and only drives in the gas mode. I found this issue and late manually changed it to EV mode. WHile then it again dropped the EV mode during the driving today (9/28/2025). When I tried to press the EV button, it shows "Drive Mode Change Unavailable"! After stopped at home, I re-started the car, I can change it to EV mode.”

“I bought this car used with a governmental help from replace my ride program, since I bough the car form a dealer [XXX] ) within few days, I took it to the dealer twice for thermostat replacement and spark plugs. and recently, There was an extended warranty from Honda for the ac condenser as this car has a major problem with ac. I took it to the dealer Honda of Riverside, California and they told me, indeed your condenser needs replacement and the good news, In California, Honda has extended its warranty. Then, they said, but you need to replace your evaporator and I need to pay $2350.26 and they refused to replace the ac condenser under warranty without replacing the evaporator and paying that much of money. I called Honda for help (goodwill) and after about a month (without having my car and many emails and phone call and time and efforts) Honda final response was "sorry, you have high mileage" Case [XXX] I really need your help to protect me from them. Thank you [XXX] [XXX]”

“I received a notice in the mail last YEAR stating that there was a problem with fuel pump in Honda Clarity and there would be a recall. I cannot get my car serviced. Honda will not respond. A dealer said not safe to drive. And they said they have no idea if they will even have parts this YEAR. Help please.”

“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.”