 Nyorai kupfuurira kweiyi ndima - Munhangemutange yake yokutanga, Australian Grand Prix, Karthikeyan akakwanisa ari pachinzvimbo chechi12. Mushure mokutanga kwakaipa kwakamuona achidonhera kunzvimbo ye18 pakuguma kwekutanga kwekutanga, akapedza ari wechi15, makumbo maviri shure kwekukunda Giancarlo Fisichella. Akawana mapoinzi ake ekutanga mu2005 United States Grand Prix uko zvikwata zvese kunze kwevatatu zvakabuda nekuda kwekupokana pamusoro pekuchengetedza matai. Akapedza ari wechina, achipedza ari pamberi pevatyairi vaviri veMinardi asi kumashure kwewaaitamba naye Monteiro. Kunze kweUSGP, nzvimbo yake yepamusoro yekupedzisa yaive nzvimbo yegumi neimwe. Muna 2005 Japanese Grand Prix vakasununguka tsika, akanga uchitsanya kwenguva refu uye pakupedzisira vanokodzera 11th. Mugore ra2005 Chinese Grand Prix akahwina mumakwikwi aya ari pachinzvimbo chechi15. Mumugumo usingafadzi wemwaka wake wa2005, Karthikeyan akarovera Jordan yake mumadziro pamakwikwi eChina, asi haana kukuvara uye akakwanisa kupa hurukuro mushure meizvozvo. 