Ford F-250 2011 — technical service bulletin
Bulletin AS-21820 · NHTSA communication 10039054 · issued Mar 1, 2011
Technical service bulletin
communication type
Fuel System, Diesel
component
2011
model years
8
vehicle entries
Official summary
Ford: there may be fuel contamination causing damage to the fuel system. The vehicle may not start, have a hard start, run rough, have exhaust smoke, or the engine may knock. 2011 f super duty. *rm
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.