I'm having the same problem. Just started today. suddenly loss of power just like the transmission suddenly shifting to neutral and then back into gear and alls well again......
Code that came out was P0685
I haven't sent my car in for checking yet.
2018 Honda Jazz GK5

 

Relay finally arrived and was swapped in. Same issue and same code showed up again about 25 miles after picking it up from the dealer. Short of replacing wiring harnesses that appear to be perfectly fine, I'm not sure what else can be done to fix this car... Really not looking forward to buying a car in this market, but I'm afraid that's the best option at this point.

 

Update : I brought the car to the dealer and they changed the ECU.
It's been only 2 days now and so far, the car seems to drive as normal. I'll report back if the problem comes back.

 

98,000 miles 2017 fit is doing the same thing. Honda claimed it was the fuel injectors and refused to fix it under the power train warranty. I bought it as certified pre owned.

 

Yup. Honda classifies fuel injectors as part of the emissions system, not the power train, which means they can skate away from the injectors after 3 years rather than the 5 year power train warranty. They like to brag about their 5 year power train warranty ("Honda Warranty Protection Makes Power Train Components a Minor Concern") but few customers realize up front that there's an awful lot of potentially problematic components (like the fuel injectors!) which are separated out into the emissions system and are only covered for 3 years.

 

can you share how much it cost? i had the same issue a few months back.

 

It was under warranty claim

 

yours within 5 year warranty by Kah? Mine 7 years old car already and I’m doubtful if they would deemed it to be under warranty.

 

Go to 3 Motorwerkz at Kaki Bukit and get them to check. The bosses are Ex Kah Motor mechanics that ventured out on their own.

 

Buen día amigo tengo el mismo problema se pierde la potencia 3 o 2 segundos como se resolvio la falla

p0685 ecm/pcm power