Hi, I have a 2015 fit six speed manual. Here are a series of things I can’t help but think are related.

- When brand new, the drivers side headlight was dim when in daytime running light conditions. At night, it was fine, normal brightness. So I ignored it.
- At around 20k miles, the orange key with the (!) illuminated. I replaced the start button, but the light has stayed on ever since with no problems starting.
- At around 40k miles, the check engine light came on for P2413, EGR. It also illuminated the traction control, tire pressure, and electric power steering lights. I replaced the EGR, still throws the code.
- At around 100k, I started getting an intermittent check charging system warning. Using the scan gauge, it looks like sometimes the alternator isn’t putting out enough juice, generally between 9.6 and 14.0. Since it’s intermittent and hasn’t impacted performance, I’ve been ignoring it.
- At around 160k, it threw a P2118 code, throttle actuator issue. I removed and cleaned the throttle body, but to no avail. The car no longer runs.

What’s going on? Is this just bad luck? Or are they all related? And I’ve ordered a new alternator and throttle body, but I’d like to clear the EGR and key errors, too.

 

Am not savvy enough to answer your question, but might be worth a trip to either a Honda dealer or at least a shop that is familiar with Hondas .....am lucky, haven't needed yo use them yet but ther is (or at least was) a nice shop on the other side of town that does extensive work on Hondas, Toyotas, Hyundai/Kias .....good to know now that my Fit is out of warranty. Cars are getting more and more dependent on electronics, and it's only getting worse - my wife's new HRV, super nice car, is ridiculously complicated......our Fit is an old school '15 LX 6 spd manual, no touch screen/keyless entry, just key, knobs, buttons, switches.....I like it like that.
I wish you luck getting it sorted, everything gets less and less easy every day to figure out on your own, unfortunately. Maybe do as little as possible to get it running and sell it? Dunno your situation.....my wife had a '10 Kia Forte SX with 160,000 on it, she got re4ar ended at a red light (she was not injured, thankfully), his insurance company offered us silly money to get it fixed - an old car with some mileage on it...estimate was $5200, they offered us $7100 to get it fixed and if it cost more, it came out of our pockets, and offered us $8900 for them to call it totalled and they get the car. $8900 for an almost 12 yr old car with 160,000 on it.....we took the money and ran...now she's driving a '21 HRV, June build, bought in July.....brand spanking new. Good luck.

 

Might not be gremlins, but squirrels or mice. The wire insulation in our cars is soy based and rodents love it so much Honda made spicy tape to protect electrical repairs.

Rodents Love Chewing Honda's Soy-Coated Wiring

 

Honda used soy based electrical insulation on all vehicles up until about 2015 apparently. After that I suspect they probably discontinued it because of the critter problems and the lawsuits but I'm not absolutely certain. My 2018 Fit required something like $2500 in repairs from rodent damage to plastic components (mostly plastic emission stuff) and insulation. There were nests in the air filter box, and on top of the gas tank (which required the tank to be dropped) etc. Interestingly enough though, no electrical wiring was chewed on or harmed from what I recall..

 

Try swapping relays around in the underhood fuse box G8HL-H71 relays, there are six of them that are identical, one of them is the ETCS control relay, two of them control fans, and one of them the third counting from the left will immediately kill a running engine and throw codes. I am unable to find a relay diagram and have found much out by trial and error while working on cooling issues that involve some of these relays.

All the black relays are interchangeable

 

I’ve always had a mouse problem with the fit, so I’d guess rodents too. Every winter and spring I trap at least 5-10 mice inside the car. None of my other cars have this problem. The thing is, I can’t find anywhere they’ve eaten wiring. A lot of the harness is visible with the air box, throttle body, and battery removed. I’ll check the relays, that’s one thing I haven’t yet looked at.

As to selling it, seems to be a good time to do that. Just need to get it fixed. Is love to find a good condition Toyota echo or original Honda Insight as a commuter. I’ve owned both anc both gave me over 250k of problem free driving.

 

I understand how you feel about Toyota's I got 350,000 miles on a 91 Toyota Celica, original automatic transmission, and it still passes DEQ and runs. My 2019 Honda fit sport is my 5th Honda I've owned, had a prelude, an older 1.5S hatchback, and two crx's and I loved all of them. All Japanese cars seem to have wiring problems and I had to bypass a relay in my Celica to fix the intermittent stalling issue it had, so Toyotas are not immune to electrical issues I had a Camry with a similar overheating relay problems. Unfortunately 2015 was the year that fits had the most problems, I believe it's the first year they were assembled in Mexico. The second generation fits are apparently the most reliable, I'm a delivery driver and whenever I deliver to a customer with a Honda fit I asked them how many miles they have on it and if they've had to replace anything major, and no one with a first or second generation fit has told me anything other than a clutch replacement and brakes which is astonishing and they seem to go 200, 000 to 300,000 miles. I hope you can get your fit up and working and it's sad if you have to sell it but you might consider buying an older second generation fit the price has come down considerably and even at 150,000 miles they are still worth buying if you can get it for around $4,000.

 

Thanks for the input everyone. The fit is in the shop now. It’s the first mechanic visit since new. 170k without any unexpected issues is still pretty good, and I’ll follow up with what I learn.