Infiniti QX50 2020 — technical service bulletin
Bulletin ITB20-025 · NHTSA communication 10183965 · issued Nov 10, 2020
Technical service bulletin
communication type
Service Brakes
component
2020
model years
1
vehicle entries
Official summary
Dtc b2724-23 and/or c1b56-04 stored, and/or rab error message or warning if you confirm one or both of the following dtcs are stored: ï · b2724-23 (sonar control unit - sonar ecu internal failure [under voltage]) ï · c1b56-04 (sonar circuit - system internal malfunction) note: a rab warning may appear in the vehicle information display. Action reprogram the sonar control unit, if applicable.
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.