Freightliner Cascadia 2007–2017 — technical service bulletin
Bulletin SS1034761 · NHTSA communication 10179148 · issued Aug 25, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007–2017
model years
11
vehicle entries
Official summary
Service Solution for P3 - CEL On and Engine de-rate due to ATD Chassis Harness Circuit 532M5+ at DEF Heater Supply location is shorted. Harness part number A66-03217-002 has been reported experiencing failures due to damages to 532M5+ circuit shorting /or corrosion in terminals at Connector (23-13053-200) harness location "ATD_CHAS_F_O_HTR_LINE_DEF_5B" .
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.