The grimoire card The Aftermath Uldren states he crash landed in the Candor Isles on a sand dune not in a cave in Hellas Basin. Also his crow fix his ship. The next Grimoire card states he was being dragged in Dirt not sand by his captures. Which would mean he and his ship wouldn't be on Mars and on Earth where his captors reside.
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Really the problem is, how is is ship still on Mars, when he is not likely to be there. His Crows fixed the ship. He crashed half a world away. Ok, easy, the crows fixed the ship and he flew to Hellas Basis when he was shot down again. Ok, no problem, that explains things. Now how is he later captured by Fallen on Mars, whom have no presence, except for the house of Wolves. The grimoire card Does not specifically mentioned he's on Earth, only that he was not on his planet. So he could be on Earth or Venus as the moon is not a planet. So how does she crash on Mars and get to another planet with no ship. Unless the Kings are on Mars but we haven't found them yet. Or he gets another ship.