Lincoln Corsair: Intake Air Distribution and Filtering - 2.0L EcoBoost (177kW/240PS) – MI4 / Diagnosis and Testing - Intake Air Flow

Lincoln Corsair 2020-2024 Service Manual / Powertrain / Engine / Intake Air Distribution and Filtering - 2.0L EcoBoost (177kW/240PS) – MI4 / Diagnosis and Testing - Intake Air Flow

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	P0111:00	Intake Air Temperature Sensor 1 Circuit Range/Performance (Bank 1): No Sub Type Information	GO to Pinpoint Test DA
PCM	P0112:00	Intake Air Temperature Sensor 1 Circuit Low (Bank 1): No Sub Type Information	GO to Pinpoint Test DA
PCM	P0113:00	Intake Air Temperature Sensor 1 Circuit High (Bank 1): No Sub Type Information	GO to Pinpoint Test DA
PCM	P0114:00	Intake Air Temperature Sensor 1 Intermittent/Erratic (Bank 1): No Sub Type Information	GO to Pinpoint Test DA
PCM	P0505:00	Idle Control System: No Sub Type Information	GO to Pinpoint Test HU
PCM	P0506:00	Idle Control System - RPM Lower Than Expected: No Sub Type Information	GO to Pinpoint Test HU
PCM	P0507:00	Idle Control System - RPM Higher Than Expected: No Sub Type Information	GO to Pinpoint Test HU
PCM	P050A:00	Cold Start Idle Control System Performance: No Sub Type Information	GO to Pinpoint Test HU
PCM	P050B:00	Cold Start Ignition Timing Performance 'A': No Sub Type Information	GO to Pinpoint Test HU
PCM	P050E:00	Cold Start Engine Exhaust Temperature Too Low: No Sub Type Information	GO to Pinpoint Test HU
PCM	P1112:00	Intake Air Temperature Circuit Intermittent: No Sub Type Information	GO to Pinpoint Test DA
PCM	P115E:00	Throttle Actuator Control Throttle Body Air Flow Trim at Max Limit: No Sub Type Information	GO to Pinpoint Test HU
PCM	P1548:00	Engine Air Filter Restriction: No Sub Type Information	GO to Pinpoint Test HU

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 > Runs Rough > All Running Modes > Always	GO to Pinpoint Test DA
Driving Performance > Idle Quality > Fast > Always	GO to Pinpoint Test HU
Driving Performance > Idle Quality > Slow > Always	GO to Pinpoint Test HU
Driving Performance > Idle Quality > Slow Return > Always	GO to Pinpoint Test HU
Driving Performance > Idle Quality > Rough > Always	GO to Pinpoint Test DA
Driving Performance > Stalls/Quits > Deceleration > Always	GO to Pinpoint Test HU
Driving Performance > Lack/Loss of Power > Acceleration > Always	GO to Pinpoint Test HU
Driving Performance > Lack/Loss of Power > Cruise/ Steady Speed > Always	GO to Pinpoint Test HU
Driving Performance > Hesitates/Stumble > Acceleration > Always	GO to Pinpoint Test DA
Driving Performance > Engine Surge > At Idle > Always	GO to Pinpoint Test DA
Driving Performance > Engine Surge > Cruise/ Steady Speed > Always	GO to Pinpoint Test HU

Pinpoint Tests

PINPOINT TEST DA: INTAKE AIR TEMPERATURE (IAT) SENSOR

Introduction

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0111:00	Intake Air Temperature Sensor 1 Circuit Range/Performance (Bank 1): No Sub Type Information	Sets when the PCM detects the IAT sensor value does not correlate with the CAC temperature sensor value or the IAT2 sensor value at ignition ON after a calibrated soak period (typically 6 to 8 hours). If the IAT2 sensor is not present, the ECT sensor value or the CHT sensor value is used for the rationality test. This DTC also sets if the IAT sensor value exceeds the maximum calibrated temperature threshold while driving.
PCM P0112:00	Intake Air Temperature Sensor 1 Circuit Low (Bank 1): No Sub Type Information	Sets when the PCM detects the IAT sensor signal is less than the self-test minimum. An IAT sensor PID reading less than the self-test minimum with ignition ON engine OFF or during any engine operating mode indicates a concern is present.
PCM P0113:00	Intake Air Temperature Sensor 1 Circuit High (Bank 1): No Sub Type Information	Sets when the PCM detects the IAT sensor signal is greater than the self-test maximum. An IAT sensor PID reading greater than self-test maximum with the ignition ON engine OFF or during any engine operating mode indicates a concern is present.
PCM P0114:00	Intake Air Temperature Sensor 1 Intermittent/Erratic (Bank 1): No Sub Type Information	Sets when the PCM detects the IAT sensor signal was intermittent during the Comprehensive Component Monitor (CCM). Monitor the IAT sensor value on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.
PCM P1112:00	Intake Air Temperature Circuit Intermittent: No Sub Type Information	Sets when the PCM detects the IAT sensor signal is intermittent. Monitor the IAT sensor PID on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.

Possible Sources

IAT sensor circuitry concern
IAT sensor (12A697)
PCM (12A650)

PINPOINT TEST HU: INTAKE AIR SYSTEMS

Introduction

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0505:00	Idle Control System: No Sub Type Information	Sets when the PCM detects the desired RPM could not be reached or controlled during the KOER self-test. This DTC may be accompanied by other Diagnostic Trouble Codes (DTCs). Diagnose other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the DTC and carry out the KOER , self-test.
PCM P0506:00	Idle Control System - RPM Lower Than Expected: No Sub Type Information	Sets when the PCM detects the engine idle speed is less than the desired RPM . This DTC may be accompanied by other Diagnostic Trouble Codes (DTCs). Diagnose other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the DTC and carry out the KOER , self-test.
PCM P0507:00	Idle Control System - RPM Higher Than Expected: No Sub Type Information	Sets when the PCM detects the engine idle speed is greater than the desired RPM . This DTC may be accompanied by other Diagnostic Trouble Codes (DTCs). Diagnose other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the DTC and carry out the KOER , self-test.
PCM P050A:00	Cold Start Idle Control System Performance: No Sub Type Information	Sets when the PCM detects the difference between desired and actual engine speed exceeds the calibrated threshold. Disregard the freeze frame data. Freeze frame data does not apply to the cold start monitor. This DTC is informational only and may be accompanied by other Diagnostic Trouble Codes (DTCs). Diagnose other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the Diagnostic Trouble Codes (DTCs) and verify the engine coolant temperature is below 37.8°C (100°F). Allow the vehicle to soak for 2 to 3 hours if necessary for the engine coolant temperature to fall below 37.8°C (100°F). Start the engine without touching the accelerator pedal and allow the engine to idle for 6 minutes in park. If no Diagnostic Trouble Codes (DTCs) are present and the MIL is not illuminated after idling for 6 minutes, carry out the KOER , self-test to confirm that no Diagnostic Trouble Codes (DTCs) are present and the repair is complete.
PCM P050B:00	Cold Start Ignition Timing Performance 'A': No Sub Type Information	Sets when the PCM detects the difference between desired and commanded spark timing exceeds the calibrated threshold. Disregard the freeze frame data. Freeze frame data does not apply to the cold start monitor. This DTC is informational only and may be accompanied by other Diagnostic Trouble Codes (DTCs). Diagnose other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the Diagnostic Trouble Codes (DTCs) and verify the engine coolant temperature is below 37.8°C (100°F). Allow the vehicle to soak for 2 to 3 hours if necessary for the engine coolant temperature to fall below 37.8°C (100°F). Start the engine without touching the accelerator pedal and allow the engine to idle for 6 minutes in park. If no Diagnostic Trouble Codes (DTCs) are present and the MIL is not illuminated after idling for 6 minutes, carry out the KOER , self-test to confirm that no Diagnostic Trouble Codes (DTCs) are present and the repair is complete.
PCM P050E:00	Cold Start Engine Exhaust Temperature Too Low: No Sub Type Information	Sets when the PCM detects the catalyst temperature ratio exceeds the calibrated value and the MIL illuminates. The PCM calculates the actual catalyst warm up temperature during a cold start. The PCM then compares the actual catalyst temperature to the expected catalyst temperature model. The difference between the actual and expected temperatures is a ratio. This DTC sets when this ratio exceeds the calibrated value and the malfunction indicator lamp (MIL) illuminates. Disregard the freeze frame data. Freeze frame data does not apply to the cold start monitor. This DTC is informational only and may be accompanied by other Diagnostic Trouble Codes (DTCs). Diagnose other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, inspect the intake air system for air restrictions, vacuum leaks, and damage. If no concerns are present, clear the Diagnostic Trouble Codes (DTCs) and verify the engine coolant temperature is below 37.8°C (100°F). Allow the vehicle to soak for 2 to 3 hours if necessary for the engine coolant temperature to fall below 37.8°C (100°F). Start the engine without touching the accelerator pedal and allow the engine to idle for 6 minutes in park. If no Diagnostic Trouble Codes (DTCs) are present and the MIL is not illuminated after idling for 6 minutes, carry out the KOER , self-test to confirm that no Diagnostic Trouble Codes (DTCs) are present and the repair is complete.
PCM P115E:00	Throttle Actuator Control Throttle Body Air Flow Trim at Max Limit: No Sub Type Information	Sets when the PCM detects the maximum allowed compensation is reached and is no longer able to compensate for buildup. Install a new throttle body. Refer to the appropriate 303-04 section, Fuel Charging and Controls.
PCM P1548:00	Engine Air Filter Restriction: No Sub Type Information	Sets when the PCM detects the airflow is out of range at various engine speeds and during WOT operation when compared to the calibrated value. If this DTC sets, inspect the intake air system and replace the air filter if no restrictions are found. Refer to the appropriate 303-12 section, Intake Air Distribution and Filtering for air filter replacement.

Possible Sources

Intake air system concern
Exhaust system concern
IMRC circuitry concern
Air cleaner assembly (including air cleaner element) (9600)
Air inlet tube (9F843)
Clean air tube hose and resonator (9R504) and (9F593)
IMRC solenoid (9J559)
IMRC sensor (9P471)
Throttle body assembly (9E926)
PCM (12A650)

Diagnosis and Testing - Intake Air Distribution and Filtering

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

Diagnosis and Testing - Intake Air Pressure and Temperature

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)...

Other information:

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