Volkswagen Atlas 2018–2020 — technical service bulletin
Bulletin TT 01 20 04 · NHTSA communication 10177418 · issued Jul 17, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2020
model years
3
vehicle entries
Official summary
Address DTC P1640 Fault code in ECM
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.