Ford Bronco 2023 — technical service bulletin
Bulletin SSM 51592 · NHTSA communication 10236026 · issued May 2, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2023
model years
1
vehicle entries
Official summary
Some 2023 Bronco vehicles equipped with 2.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module. This may be due to a fault detected while in transport mode or a leak in the positive crankcase ventilation system. To correct the condition, deactivate transport mode, refer to WSM, Section 419-10. Perform a visual inspection of possible sources outlined in Workshop Manual (WSM), Section 303-08B pinpoint test (PPT) HG. Clear all DTCs, allow the vehicle to sit until engine coolant temperature is below 4
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.