P04DB · メーカー技術情報

KIA · 2026-07-31

TECHNICAL SERVICE BULLETIN: CRANKCASE EJECTOR INSPECTION/REPLACEMENT (SA650) - This bulletin provides instructions to inspect and, if necessary, replace the PCV ejector on certain 2027MY Telluride Hybrid (LQ2AH) vehicles produced from December 4, 2025, through March 20, 2026. Affected vehicles may display an illuminated Malfunction Indicator Lamp (MIL) with Diagnostic Trouble Code (DTC) P04DB00 due to damage to the ejector assembly. No drivability issues are associated with this condition.

FORD · 2026-04-22

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

FORD · 2026-02-16

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.

FORD · 2026-02-02

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 HG1-3 to check for leaks in the positive crankcase ventilation (PCV) and repair as needed. If no leaks are found in the PCV system, this condition may be due to the software in the PCM. This condition does not affect vehicle durability and no additional diagnosis is required for this condition at this time. The replacement of components or reprogramming of modules will not resolve this condition.…

HYUNDAI · 2026-01-23

Certain Tucson Hybrid (NX4 HEV) and Tucson Plug-in Hybrid (NX4 PHEV) vehicles equipped with the 1.6T-GDI Gamma II engine may set DTC P04DB00 (Crankcase Ventilation System Disconnected). Technical Service Bulletin (TSB) 25-01-083H provides instructions to perform a software update on the Engine Control Module (ECM) to resolve this condition.

HYUNDAI · 2025-11-19

Certain Tucson Hybrid (NX4 HEV) and Tucson Plug-in Hybrid (NX4 PHEV) vehicles equipped with the 1.6T-GDI Gamma II engine may set DTC P04DB00 (Crankcase Ventilation System Disconnected). Technical Service Bulletin (TSB) 25-01-083H provides instructions to perform a software update on the Engine Control Module (ECM) to resolve this condition.

HYUNDAI · 2025-11-19

Certain Tucson Hybrid (NX4 HEV) and Tucson Plug-in Hybrid (NX4 PHEV) vehicles equipped with the 1.6T-GDI Gamma II engine may set DTC P04DB00 (Crankcase Ventilation System Disconnected). This bulletin provides instructions to perform a software update on the Engine Control Module (ECM) to resolve this condition.

FREIGHTLINER, MERCEDES-BENZ · 2025-04-03

Check engine light illuminated - Fault code current P04D-B79 The crankcase ventilation system is interrupted. Complaint: Check engine light on. Fault code P04DB79 is current in the engine control module (N3/10). Cause: Open circuit or high resistance to crankcase vent line contact Remedy 1. Check the electrical connector for S208 vent line contact switch. Refer to attached photo of connection location. 2. Ensure the bolted connection is secure and bolt can be torqued (9Nm). 3. Check continuity from vent line connection to ME control unit. Repair wire if damage is found.

CHEVROLET, GMC · 2024-12-18

This technical bulletin provides repair information to correct a customer concern of an MIL Illuminated in DIC (with DTCs P2463 and P04DB set).

CHEVROLET, GMC · 2024-10-04

This technical bulletin provides repair information to correct a customer concern of an MIL Illuminated in DIC (with DTCs P2463 and P04DB set).

MERCEDES-BENZ · 2024-10-04

Complaint Check engine light on. One of the below fault codes is current in the engine control module (N3/10). P04DB29, P04DB31, P04DB79 Cause Open circuit or high resistance to crankcase vent line contact Remedy 1. Check the electrical connector for the relevant vent line contact switch noted below. Refer to attached photos of connection locations. 2. Ensure the bolted connection is secure and bolt can be torqued (9Nm). 3. Check continuity from vent line connection to ME control unit. Repair wire if damage is found. • The circuit from ME provides 5V and is pulled to 0V when the ground connection is intact. M260 P04DB31- S88/15 P04DB79- S88/16 M264 P04DB31- S88/15 P04DB79- S88/16 P04DB29- S88/17 M270/M274 P04DB79- S88/5 Note: This repair is not warrantable if the connection was left loose…

JEEP · 2024-07-10

"Flash: Powertrain Control Module (PCM) Updates **Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P2463 - Particulate Filter Restriction - Soot Accumulation Bank 1. (EE Market Only)** ● P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. ● P025C - Fuel Pump Module Control Circuit Low. ● P0300-00 - Multiple Cylinder Misfire. ● P0301-00 - Cylinder 1 Misfire. ● P0302-00 - Cylinder 2 Misfire. ● P0303-00 - Cylinder 3 Misfire. ● P0304-00 - Cylinder 4 Misfire. ● P0305-00 - Cylinder 5 Misfire. ● P0403-00 - EGR Control Circuit Open (Disabled Fault). ● P208B - Reductant Pump 1 Control Performance. ● P04DB - Crankcase Ventilation System Disconnected. ● P040F -…

FORD · 2023-05-02

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 45°C (113°F). Start the vehicle and allow it to idle in park (P) for 1 minute. Using the appropriate scan tool, check for DTCs. If DTC P04DB returns, perform PPT HG in the WSM. WSM, Section 303-14B…

FORD · 2023-02-14

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 (PCM). This may be due to a fault detected while in transport mode or a leak in the positive crankcase ventilation system (PCV). To correct the condition, perform a visual inspection of all possible sources outlined in Workshop Manual (WSM), Section 303-08B pinpoint test (PPT) HG. Deactivate transport mode and place into normal operation mode, refer to WSM, Section 419-10. Clear all DTCs, allow the vehicle to sit with key off for at least 2 hours or until engine coolant temperature (ECT) is below 45°C (113°F). Start the vehicle and allow it to idle in park (P) for at least 1 minute. Using the…

JEEP · 2023-01-07

Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes (DTCs) have been set: **P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. P025C - Fuel Pump Module Control Circuit Low. P208B - Reductant Pump 1 Control Performance. P0300-00 - Multiple Cylinder Misfire (MIL Illuminated During 4WD-LO Only). P0301-00 - Cylinder 1 Misfire (MIL Illuminated During 4WD-LO Only). P0302-00 - Cylinder 2 Misfire (MIL Illuminated During 4WD-LO Only). P0303-00 - Cylinder 3 Misfire (MIL Illuminated During 4WD-LO Only). P0304-00 - Cylinder 4 Misfire (MIL Illuminated During 4WD-LO Only). P0305-00 - Cylinder 5 Misfire (MIL…

JEEP · 2022-12-01

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following DTCs have been set: P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low. P025C - Fuel Pump Module Control Circuit Low. P0300-00 - Multiple Cylinder Misfire. P0301-00 - Cylinder 1 Misfire. P0302-00 - Cylinder 2 Misfire. P0303-00 - Cylinder 3 Misfire. P0304-00 - Cylinder 4 Misfire. P0305-00 - Cylinder 5 Misfire. P0403-00 - EGR Control Circuit Open (Disabled Fault). P208B - Reductant Pump 1 Control Performance. P04DB - Crankcase Ventilation System Disconnected. P040F - EGR Temperature Sensor A-B…

VOLVO · 2022-02-16

Diagnostic Trouble Code (DTC) P04DB - Crankcase Ventilation Disconnected; US10+OBD13 To US14+OBD16 Emissions

MACK · 2022-02-16

Diagnostic Trouble Code (DTC) P04DB - Crankcase Ventilation Disconnected; US10+OBD13 To US14+OBD16 Emissions

MACK · 2022-01-18

Mack Chassis - Equipped With An MP8 Engine - Diagnostic Trouble Code ( DTC ) P04DB - Crankcase Ventilation Disconnected; US17+OBD16 And US17+OBD18 Emissions (Common Rail Fuel System), Model Years 2018 And 2019

JEEP · 2022-01-05

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following DTCs have been set: P04DB - Crankcase Ventilation System Disconnected. P040F - EGR Temperature Sensor A-B Correlation. P225D - Nox Sensor 1/1 Performance - Signal Stuck Low. P0088 - Fuel Rail Pressure Too High. P0404 - EGR ?A? Control Circuit Range/Performance. P20C6 - Reductant Heater 4 Control Circuit Performance. P208B - Reductant Pump 1 Control Performance. P0524 - Low oil pressure (during start up in cold ambient temps). P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P02E8-00 -…

FORD, LINCOLN · 2021-10-01

Some 2019 Edge/Nautilus vehicles equipped with a 2.0L EcoBoost engine built on or before 22-Aug-2019 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module (PCM). This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure steps to replace the crankcase ventilation tube assembly and reprogram the PCM.

RAM · 2021-05-14

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following DTCs have been set: P225D-00 - Nox Sensor 1/1 Performance - Signal Stuck Low. P249C-00 - Excessive Time to Enter Closed Loop Reductant Injection Control. P065A - Generator System Performance. P00F4-00 - Humidity Sensor Circuit Low. Improved VGT cleaning to reduce false failures for P00AF field issue. P0106-00 - Manifold Absolute Pressure Sensor Performance. P20FB-00 - Reductant Pump 2 Control Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance -…

RAM · 2021-05-14

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following DTCs have been set: P225D-00 - Nox Sensor 1/1 Performance - Signal Stuck Low. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P065A - Generator System Performance. P00F4-00 - Humidity Sensor Circuit Low. Improved VGT cleaning to reduce false failures for P00AF field issue. P0106-00 - Manifold Absolute Pressure Sensor Performance. P20FB-00 - Reductant Pump 2 Control Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance -…

RAM · 2021-05-14

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following DTCs have been set: P225D-00 - Nox Sensor 1/1 Performance - Signal Stuck Low. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control. P065A - Generator System Performance. P00F4-00 - Humidity Sensor Circuit Low. Improved VGT cleaning to reduce false failures for P00AF field issue. P0106-00 - Manifold Absolute Pressure Sensor Performance. P20FB-00 - Reductant Pump 2 Control Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance -…

FORD · 2021-04-21

Some 2020 Escape vehicles equipped with a 1.5L EcoBoost engine built on or Before 21-Jul-2020 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P04DB stored in the powertrain control module (PCM). This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure steps to replace the crankcase ventilation tube assembly and reprogram the PCM.

JEEP, RAM · 2021-04-09

Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P051B ? Crankcase Pressure Sensor Circuit Performance, and/or P04DB ? Crankcase Ventilation System Disconnected, Set After Powertrain Control Module (PCM) Replacement

RAM · 2021-02-02

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the followingDiagnostic Trouble Codes (DTCs) have been set:Change DTC number from P0101-00 to P0109-00 - Mass Air Flow Sensor Performance. P015E - Excessive Time to Enter Closed Loop Fuel Timing Control. P0534-00 - AC Refrigerant System A Charge Loss. P26FB-00 - EGR Cooler Bypass Control Stuck Closed Bank 1. P04DB-00 - Crankcase Ventilation System Disconnected. P204F-00 - Reductant System Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance - Bank 2. P2D2D-00 - Cold Start…

RAM · 2021-02-02

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the followingDiagnostic Trouble Codes (DTCs) have been set:Change DTC number from P0101-00 to P0109-00 - Mass Air Flow Sensor Performance. P015E - Excessive Time to Enter Closed Loop Fuel Timing Control. P0534-00 - AC Refrigerant System A Charge Loss. P26FB-00 - EGR Cooler Bypass Control Stuck Closed Bank 1. P04DB-00 - Crankcase Ventilation System Disconnected. P204F-00 - Reductant System Performance. P200A-00 - Intake Manifold Runner Performance - Bank 1. P200B-00 - Intake Manifold Runner Performance - Bank 2. P2D2D-00 - Cold Start…

FORD · 2021-01-26

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 reprogram the PCM.

FORD · 2021-01-12

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.