The check engine light is on constantly because of faulty fuel injectors that need to be replaced with a new part number (all 4 of them). the mpg has declined. this issues seems to be widespread from what i read online. honda has a tech service bulletin regarding this common issue of faulty fuel injectors.
I had 4 emergency lights come on while driving in motion leaving a gas station. i then drove on the interstate and had to pull over due to safety concerns. we took the 2016 honda fit to a trusted mechanic and honda dealership and both agreed that after just over 58,000 miles, all of the fuel injectors are bad and need to be replaced. both the honda dealership i purchased from and our trusted mechanic agree the fuel injectors should not be going bad at this time. the car is 2.5 years old, has had all routine oil changes and no crashes or issues. honda wants to charge $1,600 for me to get this fixed. many others online have complained of the same fuel injector parts going bad! this must be recalled immediately! honda knows this is an issue and is trying to rip customers off who did nothing wrong except trust their brand.