Lincoln Navigator: Fuel Charging and Controls - Turbocharger - 3.5L EcoBoost (272kW/370PS) / Turbocharger Controls. Diagnosis and Testing

Lincoln Navigator 2018-2025 Workshop Manual / Engine / Fuel Charging and Controls - Turbocharger - 3.5L EcoBoost (272kW/370PS) / Turbocharger Controls. 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	P0034:00	Turbocharger/Supercharger Bypass Valve 'A' Control Circuit Low: No Sub Type Information	GO to Pinpoint Test HN
PCM	P0035:00	Turbocharger/Supercharger Bypass Valve 'A' Control Circuit High: No Sub Type Information	GO to Pinpoint Test HN
PCM	P0234:00	Turbocharger/Supercharger 'A' Overboost Condition: No Sub Type Information	GO to Pinpoint Test HN
PCM	P0243:00	Turbocharger/Supercharger Wastegate Actuator 'A': No Sub Type Information	GO to Pinpoint Test HN
PCM	P0247:00	Turbocharger/Supercharger Wastegate Actuator 'B': No Sub Type Information	GO to Pinpoint Test HN
PCM	P0299:00	Turbocharger/Supercharger 'A' Underboost Condition: No Sub Type Information	GO to Pinpoint Test HN
PCM	P25B3:00	Turbocharger/Supercharger Wastegate 'A' Stuck Open: No Sub Type Information	GO to Pinpoint Test HN
PCM	P25B4:00	Turbocharger/Supercharger Wastegate 'A' Stuck Closed: No Sub Type Information	GO to Pinpoint Test HN
PCM	P25B5:00	Turbocharger/Supercharger Wastegate 'B' Stuck Open: No Sub Type Information	GO to Pinpoint Test HN
PCM	P25B6:00	Turbocharger/Supercharger Wastegate 'B' Stuck Closed: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2AB7:00	Wastegate Position Sensor 'A' Circuit: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2AB8:00	Wastegate Position Sensor 'A' Circuit Low: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2AB9:00	Wastegate Position Sensor 'A' Circuit High: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2ABA:00	Wastegate Position Sensor 'B' Circuit: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2ABB:00	Wastegate Position Sensor 'B' Circuit Low: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2ABC:00	Wastegate Position Sensor 'B' Circuit High: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2ABD:00	Turbocharger/Supercharger Wastegate Actuator 'A' Driver Current/Temperature Too High: No Sub Type Information	GO to Pinpoint Test HN
PCM	P2ABE:00	Turbocharger/Supercharger Wastegate Actuator 'B' Driver Current/Temperature Too High: No Sub Type Information	GO to Pinpoint Test HN

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
Driving Performance > Lack/Loss of Power > Acceleration > Always	GO to Pinpoint Test HN
Driving Performance > Lack/Loss of Power > Cruise/ Steady Speed > Always	GO to Pinpoint Test HN

Pinpoint Tests

PINPOINT TEST HN: TURBOCHARGER SYSTEM

Introduction

NOTE: To recreate the original conditions that set the DTC or caused the symptom, the vehicle may require driving.

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 P0034:00	Turbocharger/Supercharger Bypass Valve 'A' Control Circuit Low: No Sub Type Information	Sets when the PCM detects an open circuit or a short to ground from the turbocharger bypass valve (TCBY) circuit. This DTC only sets when the valve is commanded closed.
PCM P0035:00	Turbocharger/Supercharger Bypass Valve 'A' Control Circuit High: No Sub Type Information	Sets when the PCM detects high voltage from the turbocharger bypass valve (TCBY) circuit. This DTC only sets when the valve is commanded open.
PCM P0234:00	Turbocharger/Supercharger 'A' Overboost Condition: No Sub Type Information	This DTC sets when the turbocharger system TCBP PID value is greater than a calibrated threshold, or the turbocharger system TCBP PID value is greater than the turbocharger boost pressure (TCBP) desired value for a calibrated length of time. Check tubing for restrictions, cracks and incorrect fitting connections. Check the turbocharger wastegate regulating valve solenoid for correct operation.
PCM P0243:00	Turbocharger/Supercharger Wastegate Actuator 'A': No Sub Type Information	Sets when the PCM detects the TCWGM1+ and TCWGM1- circuits are reversed. Verify the TCWGM1+ and TCWGM1- circuit positions are correct in the harness connector.
PCM P0247:00	Turbocharger/Supercharger Wastegate Actuator 'B': No Sub Type Information	Sets when the PCM detects the TCWGM2+ and TCWGM2- circuits are reversed. Verify the TCWGM2+ and TCWGM2- circuit positions are correct in the harness connector.
PCM P0299:00	Turbocharger/Supercharger 'A' Underboost Condition: No Sub Type Information	Sets when the PCM detects the actual turbocharger boost pressure (TCBP) value is less than the desired turbocharger boost pressure (TCBP) value by 27.6 kPa (4 psi) or more for 5 seconds, indicating an under boost condition. Check tubing for restrictions, cracks and incorrect fitting connections. Check the turbocharger wastegate regulating valve solenoid for correct operation.
PCM P25B3:00	Turbocharger/Supercharger Wastegate 'A' Stuck Open: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate 1 is at a greater angle than commanded. Check the turbocharger wastegate motor linkage for stuck or binding concern.
PCM P25B4:00	Turbocharger/Supercharger Wastegate 'A' Stuck Closed: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate 1 is at a lower angle than commanded. Check the turbocharger wastegate motor linkage for stuck or binding concern.
PCM P25B5:00	Turbocharger/Supercharger Wastegate 'B' Stuck Open: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate 2 is at a greater angle than commanded. Check the turbocharger wastegate motor linkage for stuck or binding concern.
PCM P25B6:00	Turbocharger/Supercharger Wastegate 'B' Stuck Closed: No Sub Type Information	This DTC sets when Sets when the PCM detectsthe turbocharger wastegate 2 is at a lower angle than commanded. Check the turbocharger wastegate motor linkage for stuck or binding concern.
PCM P2AB7:00	Wastegate Position Sensor 'A' Circuit: No Sub Type Information	Sets when the PCM detects the TCWP1 circuit voltage is greater than or less than a calibrated threshold.
PCM P2AB8:00	Wastegate Position Sensor 'A' Circuit Low: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate position 1 sensor is out of self-test range low.
PCM P2AB9:00	Wastegate Position Sensor 'A' Circuit High: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate position 1 sensor is out of self-test range high.
PCM P2ABA:00	Wastegate Position Sensor 'B' Circuit: No Sub Type Information	Sets when the PCM detects the TCWP2 circuit voltage is greater than or less than a calibrated threshold.
PCM P2ABB:00	Wastegate Position Sensor 'B' Circuit Low: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate position 2 sensor is out of self-test range low.
PCM P2ABC:00	Wastegate Position Sensor 'B' Circuit High: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate position 2 sensor is out of self-test range high.
PCM P2ABD:00	Turbocharger/Supercharger Wastegate Actuator 'A' Driver Current/Temperature Too High: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate motor 1 driver current is greater than a calibrated threshold.
PCM P2ABE:00	Turbocharger/Supercharger Wastegate Actuator 'B' Driver Current/Temperature Too High: No Sub Type Information	Sets when the PCM detects the turbocharger wastegate motor 2 driver current is greater than a calibrated threshold.

Possible Sources

Intake air system concern
Turbocharger bypass valve circuitry concern
Turbocharger bypass valve (9K378)
Turbocharger wastegate motor (9G488)
PCM (12A650)

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