Ford F-250 SD 2017 — technical service bulletin
Bulletin TSB 20-2270 · NHTSA communication 10179137 · issued Aug 18, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017
model years
4
vehicle entries
Official summary
Some 2017 F-Super Duty vehicles equipped with a 6.7L diesel engine built on or before 04-Aug-2017 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P203B. This may be due to a low voltage condition during engine cranking. To correct this condition, reflash the diesel exhaust fluid (DEF) reductant level sensor/quality module using the Urea Sensor Reprogramming tool.
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.