One problem related to timing tensioner has been reported for the 2009 Ford F-250. The most recently reported issues are listed below.
We own a 2009 Ford f250 super duty 4x4, with low miles (21478). This vehicle has run great since we purchased it new. As we were driving, the engine began to run poorly and loose power. The engine light then came on. The mechanic scanner the engine codes p0012-p0018-p0022-p0341-p052d, indicating faulty cam phasers and tensioners, and that the engine was out of time. This pickup has low mileage and all the recommended maintenance has always been done. The Ford parts department stated that they keep these parts stocked because it is a common repair issue.