Lincoln Navigator: Engine Emission Control - 3.5L EcoBoost (272kW/370PS) / Crankcase Ventilation. Diagnosis and Testing

Lincoln Navigator 2018-2025 Workshop Manual / Engine / Engine Emission Control - 3.5L EcoBoost (272kW/370PS) / Crankcase Ventilation. Diagnosis and Testing

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Module	DTC	Description	Action
PCM	P04DB:00	Crankcase Ventilation System Disconnected: No Sub Type Information	GO to Pinpoint Test HG
PCM	P051A:00	Crankcase Pressure Sensor 'A' Circuit: No Sub Type Information	GO to Pinpoint Test HG
PCM	P051B:00	Crankcase Pressure Sensor 'A' Circuit Range/Performance: No Sub Type Information	GO to Pinpoint Test HG
PCM	P2282:00	Air Leak Between Throttle Body and Intake Valves Bank 1: No Sub Type Information	GO to Pinpoint Test HG
PCM	U060E:00	Lost Communication With Crankcase Pressure Sensor: No Sub Type Information	GO to Pinpoint Test HG

Global Customer Symptom Code (GCSC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Symptom	Action
Start/Run/Move > Dipstick > Engine Oil > Missing	GO to Pinpoint Test HG
Start/Run/Move > Fluids > Engine Oil > Consumption	GO to Pinpoint Test HG
Start/Run/Move > Fluids > Engine Oil > Visible Leak	GO to Pinpoint Test HG
Driving Performance > Runs Rough > Acceleration > Always	GO to Pinpoint Test HG
Driving Performance > Runs Rough > Cruise/ Steady Speed > Always	GO to Pinpoint Test HG
Driving Performance > Runs Rough > Deceleration > Always	GO to Pinpoint Test HG
Driving Performance > Runs Rough > All Running Modes > Always	GO to Pinpoint Test HG
Driving Performance > Idle Quality > Fast > Always	GO to Pinpoint Test HG
Driving Performance > Idle Quality > Rolling > Always	GO to Pinpoint Test HG
Driving Performance > Idle Quality > Slow > Always	GO to Pinpoint Test HG
Driving Performance > Idle Quality > Rough > Always	GO to Pinpoint Test HG
Driving Performance > Idle Quality > Stationary Elevated Idle Control > Inoperative	GO to Pinpoint Test HG
Driving Performance > Stalls/Quits > At Idle > Always	GO to Pinpoint Test HG
Driving Performance > Stalls/Quits > Acceleration > Always	GO to Pinpoint Test HG
Driving Performance > Stalls/Quits > Cruise/ Steady Speed > Always	GO to Pinpoint Test HG
Driving Performance > Spark Knock > Acceleration > Always	GO to Pinpoint Test HG
Driving Performance > Spark Knock > Cruise/ Steady Speed > Always	GO to Pinpoint Test HG
Driving Performance > Poor Fuel Economy > City Driving > Unloaded	GO to Pinpoint Test HG
Driving Performance > Poor Fuel Economy > Highway Driving > Unloaded	GO to Pinpoint Test HG
Driving Performance > Poor Fuel Economy > Combined > Unloaded	GO to Pinpoint Test HG
Driving Performance > Hesitates/Stumble > Cruise/ Steady Speed > Always	GO to Pinpoint Test HG
Driving Performance > Engine Surge > At Idle > Always	GO to Pinpoint Test HG
Driving Performance > Engine Surge > Acceleration > Always	GO to Pinpoint Test HG
Driving Performance > Engine Surge > Cruise/ Steady Speed > Always	GO to Pinpoint Test HG
Driving Performance > Engine Surge > Deceleration > Always	GO to Pinpoint Test HG

Pinpoint Tests

PINPOINT TEST HG: POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM

Introduction

NOTE: Refer to the appropriate Wiring Diagrams Cell for schematic and connector information.

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P04DB:00	Crankcase Ventilation System Disconnected: No Sub Type Information	Sets when PCM detects the crankcase pressure sensor is disconnected. Verify the integrity of the PCV system.
PCM P051A:00	Crankcase Pressure Sensor 'A' Circuit: No Sub Type Information	Sets when PCM detects the crankcase pressure sensor voltage is greater than or less than a calibrated value.
PCM P051B:00	Crankcase Pressure Sensor 'A' Circuit Range/Performance: No Sub Type Information	Sets when PCM detects the crankcase pressure sensor is greater than or less than an expected value for the current operating conditions.
PCM P2282:00	Air Leak Between Throttle Body and Intake Valves Bank 1: No Sub Type Information	Sets when PCM detects an air leak that exceeds a calibrated limit for greater than 5 seconds. If the airflow entering the engine exceeds the airflow through the throttle, a leak is detected and this diagnostic fails. Verify the integrity of the PCV system. Refer to Positive Crankcase Ventilation (PCV) System for aditional information.
PCM U060E:00	Lost Communication With Crankcase Pressure Sensor: No Sub Type Information	Sets when PCM no longer receives a signal from the crankcase pressure sensor.

Possible Sources

Crankcase pressure sensor circuitry concern
Intake air system concern
Vacuum hose
Oil level indicator O-ring seal
Oil cap
PCV hose
PCV valve (6A666)
Crankcase pressure sensor (6758)
PCM (12A650)

Engine Emission Control - System Operation and Component Description. Description and Operation

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Exhaust Gas Recirculation (EGR) System. Diagnosis and Testing

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Lincoln Navigator 2018-2025 Workshop Manual: Front Seats - Overview. Description and Operation

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Front Stabilizer Bar Link. Removal and Installation

Removal

NOTICE: Suspension fasteners are critical parts that affect the performance of vital components and systems. Failure of these fasteners may result in major service expense. Use the same or equivalent parts if replacement is necessary. Do not use a replacement part of lesser quality or substitute design. Tighten fasteners as specified.

NOTE: Removal steps in this procedure may contain installation details.

With the vehicle in NEUTRAL, position it on a hoist.
Refer to: Jacking and Lifting (100-02 Jacking and Lifting, Description and Operation).

NOTICE: Do not use power tools to remove or install the stabilizer bar