Dodge Challenger 2014–2021 — technical service bulletin
Bulletin S1508000323 Rev. · NHTSA communication 10190619 · issued Mar 6, 2021
Technical service bulletin
communication type
Power Train
component
2014–2021
model years
14
vehicle entries
Official summary
PCM Sets DTC P1400-Aftermarket Calibration Detected/Warranty Coverage Confirmation Required
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.