Chrysler Pacifica 2020–2021 — technical service bulletin
Bulletin 08-139-21 · NHTSA communication 10218585 · issued Aug 21, 2021
Technical service bulletin
communication type
Forward Collision Avoidance
component
2020–2021
model years
2
vehicle entries
Official summary
Flash: Adaptive Cruise Control (ACC) Module Enhancements This bulletin involves reprogramming the ACC module with the latest software available. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Code (DTC) has been set: C15D8-00 - Mismatch Tire Size. If the DTC is active, perform the software update and if stored, perform diagnostics per the published service procedure. The customer may describe one or more of the following: Adaptive Cruise Control (ACC) is inoperable and the warnin
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.