The U's skipper inadvertently headed Joe Garner's cross into his own net in the 82nd minute to hand Preston victory.
Preston went close in the seventh minute when Joe Garner's header clattered the crossbar from Chris Humphrey's cross.
Ibehre made up for his miss nine minutes after half-time when he planted a superb shot into the far corner after his long run from the halfway line had initially resulted in his shot being blocked.
U's goalkeeper Sam Walker made a superb save to foil Garner's header from point-blank range as Preston pressed.
The visitors' winner arrived with nine minutes to go when Humphrey latched on to Garner's pass and his cross hit U's skipper Wilson before sailing into the net for the winner.
- Sports & Recreation
- Joe Garner
- Chris Humphrey