Ford Mustang Mach E 2021 — technical service bulletin
Bulletin SSM 49737 · NHTSA communication 10191093 · issued Apr 16, 2021
Technical service bulletin
communication type
Equipment
component
2021
model years
1
vehicle entries
Official summary
Some 2021 Mustang Mach-E vehicles built on or before 29-Mar-2021 may exhibit a concern of the audio inoperative, no sound from audio speakers, chimes default to coming through the Instrument cluster, no communication with audio control module (ACM) or digital signal processor (DSP) module, and/or DTC U1084, U0237 and/or U0238. This may be due to the software in the DSP. To correct this condition, perform a hard reset of the DSP by disconnecting the 12-volt battery. Access the battery through the front luggage compartment by removing the left trim panel. Reprogram the DSP module using the lates
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.