He lost Bird's support but received that of Coventry corporation and narrowly held his seat at the 1802 election, ahead of Bird and his new protégé Peter Moore, whose election petition resulted in Jefferys' unseating on 11 March 1803, when the Commons decided that he did not meet the property qualification under the Parliament Act 1710, the land purportedly conveyed to him by William Bryant shortly before the election having in fact been sold by Bryant some years previously.