I have seen lists of Pandava survivors in which he isn't listed. Did he die or did he leave the war before the end?
Chekitana did not survive the war. He was killed by Duryodhana on the last day of the war.
O monarch, thy warriors headed by Duryodhana rushed against the Pandavas. Beholding the Kaurava host, the sons of Pandu, with leonine roars, rushed against those warriors headed by Duryodhana. Then thy son, O bull of Bharata's race, singling out Chekitana amongst those rushing heroes, pierced him deeply with a lance in the chest. Chekitana amongst those rushing heroes, pierced him deeply with a lance in the chest. Thus assailed by thy son, Chekitana fell down on the terrace of his car, covered with blood, and overcome with a deep swoon. Beholding Chekitana slain, the great car-warriors among the Pandavas incessantly poured their arrowy showers (upon the Kauravas).