P04DB on Ford vehicles

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Owners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.

Bulletins and campaigns Ford filed with NHTSA whose summary names P04DB. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• TSB 16-0114 Service bulletin
  2016-09-07 · Engine And Engine Cooling — Engine — Gasoline — Turbo/Supercharger
• Some 2017 Escape and MKC vehicles equipped with a 2.0L Gasoline Turbocharged Direct Injection (GTDI) engine built on or before 20-Aug-2016 may exhibit an illuminated MIL with DTC P04DB (crankcase ventilation system disconnected) in powertrain control module(PCM) memory. Follow the Service Procedure steps to correct the condition.
• TSB 17-0066 Service bulletin
  2017-09-22 · Electrical System — Ignition — Module
• Some 2017-2018 Escape and MKC vehicles equipped with 2.0L Gasoline Turbocharged Direct Injection (GTDI) engine built on or before 18-Sep-2017 may exhibit a MIL illuminated with DTC P04DB (crankcase ventilation system disconnected) in powertrain control module(PCM) memory. Follow the Service Procedure steps to correct the condition.
• SSM 46822 Service bulletin
  2017-09-18 · Electrical System
• Some 2017-2018 Escape/MKC and 2017 Edge vehicles equipped with 2.0L Gasoline Turbocharged Direct Injection(GTDI) engines may exhibit illuminated malfunction indicator light(MIL) with DTC P04DB(crankcase ventilation system disconnected) stored in Powertrain Control Module(PCM) memory. Disconnect crankcase pressure sensor electrical connector and remove crankcase vent tube. Inspect valve cover port
• SSM 48848 Service bulletin
  2020-05-27 · Engine And Engine Cooling
• Some 2020 Escape vehicles built on or after 10-Jan-2020, equipped with a 1.5L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with only diagnostic trouble code (DTC) P04DB in the powertrain control module (PCM). If this DTC is retrieved with other DTCs, diagnose those first. Engineering data has confirmed that DTC P04DB is typically a green engine and/or low mileage con
• TSB 21-2007 Service bulletin
  2021-01-12 · Engine And Engine Cooling
• Some 2020 Escape vehicles equipped with a 1.5L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module (PCM). To correct the condition, follow the Service Procedure steps to replace the crankcase ventilation tube assembly and reprogram the PCM.
• TSB 21-2024 Service bulletin
  2021-01-26 · Engine And Engine Cooling
• This article supersedes TSB 21-2007 to update the Service Procedure. Some 2020 Escape vehicles equipped with a 1.5L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module (PCM). To correct the condition, follow the Service Procedure steps to replace the crankcase ventilation tube assembly and repr
• SSM 47238 Service bulletin
  2018-04-16 · Equipment
• Some 2018 Escape vehicles equipped with a 1.5L EcoBoost engine may exhibit an illuminated MIL with DTC P04DB (crankcase ventilation system disconnected) in the powertrain control module (PCM). Inspect the crankcase pressure sensor tube at the rear air intake system connection for a partial disconnect. Disconnect the quick release coupling on the crankcase pressure sensor tube assembly and inspect
• TSB 18-2246 Service bulletin
  2018-08-17 · Electrical System
• Some 2017-2018 Escape vehicles with a 1.5L Ecoboost engine and built on 2-Feb-2017 and through 3-Aug-2018 may exhibit an illuminated MIL with diagnostic trouble codes (DTCs) P04DB and/or P051B stored in the powertrain control module (PCM). Follow the Service Procedure steps to correct the condition.
• SSM 54544 Service bulletin
  2026-02-02 · Power Train
• Some 2025 Bronco/Ranger vehicles equipped with a 2.7L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module (PCM) with no other relevant DTCs present. Refer to Workshop Manual (WSM), Section 303-08B Engine Emission Control > Diagnosis and Testing > Crankcase Ventilation > Pinpoint Test > steps HG
• TSB 26-2054 Service bulletin
  2026-02-16 · Power Train
• Some 2025 Bronco/Ranger vehicles equipped with a 2.7L EcoBoost engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module (PCM) with no other relevant DTCs present. This may be due to the software in the PCM.
• 26P04 Other
  2026-04-22 · Power Train
• Recommended Repair Prior to Sale Customer Satisfaction Program 26P04 Certain 2025 Model Year Bronco and Ranger Vehicles with 2.7L Engine Setting Diagnostic Trouble Code (DTC) P04DB Powertrain Control Module Software Update
• TSB 20-2419 Service bulletin
  2020-12-10 · Power Train
• Some 2018-2020 EcoSport vehicles equipped with a 1.0L EcoBoost engine may exhibit a reoccurring illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB. This may be due to the software in the powertrain control module (PCM). To correct the condition, follow the Service Procedure to reprogram the PCM.

A stored code names the test that failed, never the part that caused it. The record above is what Ford and its owners have filed about it; the code’s page across every make has the whole file.