Honda wants clarity over future plans for engine development in Formula 1 before committing to the sport beyond 2021, according to Red Bull team boss Christian Horner.
Honda has opted to complete its first power unit change of the season after noticing an anomaly in the data on Daniil Kvyat's Toro Rosso car through opening practice for the Chinese Grand Prix on Friday.
Honda has confirmed the general manager of its motorsport department, Masashi Yamamoto, will take up a new role to focus solely on Formula 1 from the beginning of April.
Brendon Hartley is poised to start the French Grand Prix from the back of the grid after Honda confirmed it had to change all six components on his Formula 1 power unit following an issue during practice on Friday.