2019 Honda Fit: multiple warning lights

Filed May 14, 2026 · Engine, Fuel system · MD

Multiple warning lights lit up after starting car and driving for a short distance (less than 5 feet). Honda mechanic diagnosed it as a misfire in cylinder likely due to carbon buildup or other unknown reason. Similar incidents have happened with other 2019 Honda Fit and an extension of warranty was issued for some vehicles but not all (SB 23-042). Unfortunately, mine was apparently not covered despite the same exact issue as other reported incidents.

Filed Sep 11, 2025 · Fuel system · VA

Purchased new 2019 Honda FIT. Had to have injectors replaced at dealership due to issues at 18,000 miles. At 19,743 miles started having driving issues with unusual jumping during driving/idling. Honda dealership diagnosed as misfire with excessive carbon buildup. Completed carbon cleaning procedure though only temporary repair. American Honda reviewing matter reference #4411584. Issues returned at 40,308 miles with same issues ( all lights going off on dash, carbon buildup in injectors). completed carbon cleaning at dealership. At 44,831 same lights went off again, carbon buildup seen, faulty injectors replaced at dealership. Issues continued at 56,649 where carbon cleaning took place again for issue at dealership. at 86,606 check engine lights returned with jumping, faulty injectors replaced again and a cleaning was performed at dealership. at 113,791 miles, issues came up again. Dealership cleaned again with carbon cleaner. American Honda contacted again after last dealership visit #15755510 with American Honda rep stating there is no solution at this point per Honda engineers.

Filed Aug 27, 2025 · Electrical, Fuel system · CA

Vehicle has less than 16k miles over 6 years of ownership. One day, upon starting the car, multiple warning lights, including check engine light, appeared. Dealer stated after diagnostic that issue is due to misfire in one cylinder due to carbon buildup. This is a known issue with this model, and several repair bulletins have been made about this specific issue. Certain VINs were given an extended warranty to fix this problem, but despite having this exact issue and my VIN being mentioned in the repair bulletin, my car is not covered, forcing me to pay out of pocket for this known issue. Car is deemed not safe to drive by dealer until issue is remedied.

Filed Feb 18, 2025 · Engine, Fuel system · WA

All warning lights cycle through on vehicle dashboard after turning on vehicle. Vehicle was taken to Honda Auto Service Center, where issue is diagnosed as Carbon Buildup, causing misfires. Error Diagnostic Code is one of P0300 - P0304. After maintenance, error clears out. However, there is a Honda Service Bulletin 23-042 which provides a warranty extension for Honda Fits of the same year, make, and model with the same issue, which my vehicle's VIN was not included as eligible. Issue of carbon buildup causing misfires may apply to other VIN ranges than in that bulletin, as accounted by the federal safety agency ID #11462041, #11490506, #11549767, and #11593466

Filed Jul 2, 2024 · Driver assistance · NM

Upon starting the car, all warning lights came on as disabled for the ACC/LKAS system and could not be reset by the driver. Mechanic shop stated that the battery was dying, needed replaced then driven 50 miles for the ACC/LKAS system to reset. A few weeks later there was no change. Independent mechanic stated that the error code "U300049 Multipurpose Camera Unit Internal Electronic Failure" was permanent and would need dealership assistance. Dealership stated that the camera system needed replaced and recalibrated to the tune of $1600. I find it extremely hard to believe this system failed by itself, rather was caused by bad design as this was a battery that needed replaced. Safety is at risk as the ACC/LKAS and automatic emergency braking systems were permanently disabled on the vehicle and cannot be used.

Filed Jun 10, 2023 · Fuel system · TX

When starting vehicle all warning lights became illuminated. Was able to drive car, however vehicle felt rough at idle and driver felt unsafe operating vehicle. When taken to mechanic it was found the fuel injectors need to be replaced. Vehicle was purchased from dealership with this issue occurring only 8 days after purchase and is not covered by warranty.

Filed May 4, 2023 · Driver assistance · GA

breaks, control of vehicle staying in lane -lane departure failure, door locks, auto remote failure, multiple warning lights system failures on dash, vehicle lights. car has gone off road, right on highway (right lane) and left on highway to middle lane, almost hit other vehicle. Dealer put new batteries in remote (second new set) low battery alert 2 hours later, remote failure. passed diagnostic scan. (southern honda, Savannah GA) Since then the info-system I believe to be hacked. I found vin number and other "computer" listings in vehicle including wi-fi enable, phone numbers not belonging to me, web sites, etc, I was able to remove and I reset to factory settings twice. The Honda link has now activated itself, selections "grayed out" (I always used apple/car play honda link was never used. My I phone was then hacked, hackers have complete control remotely over the phone live time, able to see screen and make changes. I am now in atlanta, I contacted dealership here where the vehicle was purchased. I also asked for the Honda Link to be turned off and if needed to please turn off/disconnect the system for safety if they are unable to remove/install "non hacking software?". Was told Honda link was not activtated, and I would be responsible for repair charges "if determined not covered under my warranty. Auto is not safe to drive, I do not have finances to pay for repairs, was unable to leave the car. Informed dealership that I looked up Honda link and activation/deactivation requires app/account which I never had nor do I know how to do. Technician indicated he did not know what I was talking about. I need assistance. I cannot receive e-mail hackers intercept

Filed Oct 31, 2022 · Electrical · IL

Multiple warning lights come on and won't turn off. We have taken to be repaired twice at a non-Honda repair shop. No issues with any of the sensors could be found and everything was reset. We just picked up our car for the second incident on 10/28 and now on 10/31 it has happened for the third time. This seems very unsafe as I am not sure if the safety features will work properly of if it will have a major malfunction while driving and possibly cause an accident.

Filed Oct 23, 2022 · Fuel system · VA

November 2021 vehicle exhibits rough idle, multiple dashboard warning lights/messages come on with mileage at approximately 13,000 miles. Driver feels unsafe operating vehicle, concerned about engine stall during highway driving. Dealer service center performs intake valve cleaning of carbon buildup and update to software under warranty. Within twelve months, October 2022, vehicle exhibits similar rough idle, multiple dashboard warning lights/messages come on with mileage at approximately 20,000 miles. Driver feels unsafe operating vehicle, concerned about engine stall during highway driving. Dealer service initiated again.

Filed Oct 7, 2022 · Fuel system · CA

My Fit was purchased in May of 2019. On October 2022, all warning lights (tpms, check engine, lane assist, etc) suddenly turned on when the vehicle was turned on. The car was taken to the same Honda dealer where it purchased and the service department determined the problem to be a cylinder misfire (P0303, cylinder #3). Since I immediately took the vehicle to be serviced, I was able to avoid a likely engine stall that other Fit owners have been experiencing. My vehicle has had all of its required and recommended maintenance performed on time at the same Honda dealer where it was purchased, including replacing the fuel pump at 15k miles and performing decarb service at 20k miles. Even though my Fit was maintained to the exact specifications Honda required, the car still had this fuel system failure which the service department was unable to explain nor were they willing to comp despite having an extended warranty (also purchased at dealer). This error code is the same problem that triggered a service bulletin on all previous model years which Honda covered but has not done so for this model year. I spoke with Honda Customer Service department (1‑800‑999‑1009, option 1, 6, 5) and their warranty department but neither were willing to help because it was beyond the 3yr/36k coverage and was not covered by the extended warranty.

Filed Feb 2, 2021 · Fuel system · 19,000 miles · VA

When starting vehicle the vehicle will miss fire causing all warning lights to come on the dash board. The first fix included new fuel injectors. It then happened again a few months later, this time a different one misfired. No long term solution found at this point to the problem.