One problem related to diesel engine has been reported for the 2002 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Ford F-150 based on all problems reported for the 2002 F-150.
Spark plug blew out of cylinder on my triton 5. 4l Ford f150 lightning truck. 900 miles after warranty expired. Ford dealer quoted $3,100 to replace cylinder head with a 50% goodwill discount. In my searches on the web this is a very common problem. Very common on their v10 diesel engines Ford does not acknowledge that a defect exists.