Lincoln Corsair: Engine Cooling - 2.0L EcoBoost (177kW/240PS) – MI4 / Diagnosis and Testing - Engine Temperature

Lincoln Corsair 2020-2024 Service Manual / Powertrain / Engine / Engine Cooling - 2.0L EcoBoost (177kW/240PS) – MI4 / Diagnosis and Testing - Engine 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).

Module	DTC	Description	Action
PCM	P0116:00	Engine Coolant Temperature Sensor 1 Circuit Range/Performance: No Sub Type Information	GO to Pinpoint Test DX
PCM	P0117:00	Engine Coolant Temperature Sensor 1 Circuit Low: No Sub Type Information	GO to Pinpoint Test DX
PCM	P0118:00	Engine Coolant Temperature Sensor 1 Circuit High: No Sub Type Information	GO to Pinpoint Test DX
PCM	P0119:00	Engine Coolant Temperature Sensor 1 Circuit Intermittent/Erratic: No Sub Type Information	GO to Pinpoint Test DX
PCM	P011E:00	Engine Coolant Temperature 1 / Ambient Air Temperature Correlation: No Sub Type Information	GO to Pinpoint Test DX
PCM	P017C:00	Cylinder Head Temperature Sensor 'A' Circuit Low: No Sub Type Information	GO to Pinpoint Test DL
PCM	P017D:00	Cylinder Head Temperature Sensor 'A' Circuit High: No Sub Type Information	GO to Pinpoint Test DL
PCM	P017E:00	Cylinder Head Temperature Sensor 'A' Circuit Intermittent/Erratic: No Sub Type Information	GO to Pinpoint Test DL
PCM	P101F:00	Cylinder Head Temperature Sensor 1 Out Of Self Test Range: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1021:00	Cylinder Head Temperature Sensor 2 Circuit Range/Performance: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1022:00	Cylinder Head Temperature Sensor 2 Circuit Low: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1023:00	Cylinder Head Temperature Sensor 2 Circuit High: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1024:00	Cylinder Head Temperature Sensor 2 Circuit Intermittent/Erratic: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1025:00	Cylinder Head Temperature Sensor 2 Out Of Self Test Range: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1026:00	Engine Coolant Temperature 1 / Cylinder Head Temperature 2 Correlation: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1116:00	Engine Coolant Temperature Sensor Out Of Self Test Range: No Sub Type Information	GO to Pinpoint Test DX
PCM	P1117:00	Engine Coolant Temperature Sensor Circuit Intermittent: No Sub Type Information	GO to Pinpoint Test DX
PCM	P111B:00	Engine Coolant Warm-up Not Detected: No Sub Type Information	GO to Pinpoint Test DX
PCM	P1285:00	Cylinder Head Overtemperature Condition: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1288:00	Cylinder Head Temperature Sensor Out Of Self Test Range: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1289:00	Cylinder Head Temperature Sensor Circuit High: No Sub Type Information	GO to Pinpoint Test DL
PCM	P128A:00	Cylinder Head Temperature Sensor Circuit Intermittent/Erratic: No Sub Type Information	GO to Pinpoint Test DL
PCM	P1290:00	Cylinder Head Temperature Sensor Circuit Low: No Sub Type Information	GO to Pinpoint Test DL

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 > Running > Smoke From Exhaust > Black	GO to Pinpoint Test DL
Driving Performance > Idle Quality > Fast > Always	GO to Pinpoint Test DX
Driving Performance > Idle Quality > Slow Return > Always	GO to Pinpoint Test DX
Driving Performance > Idle Quality > Rough > Always	GO to Pinpoint Test DL
Driving Performance > Poor Fuel Economy > Combined > Loaded	GO to Pinpoint Test DL

Pinpoint Tests

PINPOINT TEST DL: CYLINDER HEAD TEMPERATURE (CHT) SENSOR

Introduction

NOTE: On a typical vehicle, the CHT sensor is located in the cylinder head and the CHT 2 sensor is located in the exhaust manifold.

Normal Operation and Fault Conditions

On applications that do not use an ECT sensor, the CHT sensor is used to determine the engine coolant temperature. To cover the entire temperature range of both the CHT and ECT sensors, the PCM has a dual switching resistor circuit on the CHT input. A graph showing the temperature switching from the COLD END line to the HOT END line, with increasing temperature and back with decreasing temperature is included. Note the temperature to voltage overlap zone. Within this zone it is possible to have either a COLD END or HOT END value at the same temperature. For example, at 90C (194F) the voltage could read either 0.60 volt or 3.71 volts. Refer to the table for the expected values.

Voltage values calculated for VREF = 5 volts. These values can vary by 15% due to sensor and VREF variations.

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P017C:00	Cylinder Head Temperature Sensor 'A' Circuit Low: No Sub Type Information	Sets when the PCM detects the CHT circuit is shorted to ground. The DTC P0117 may also be reported when this DTC sets. Either of these Diagnostic Trouble Codes (DTCs) illuminates the MIL .
PCM P017D:00	Cylinder Head Temperature Sensor 'A' Circuit High: No Sub Type Information	Sets when the PCM detects a CHT circuit concern is detected. The DTC P0118 may also be reported when this DTC sets. Either of these Diagnostic Trouble Codes (DTCs) illuminate the MIL .
PCM P017E:00	Cylinder Head Temperature Sensor 'A' Circuit Intermittent/Erratic: No Sub Type Information	Sets when the PCM detects the CHT circuit becomes intermittently open or short while the engine is running.
PCM P101F:00	Cylinder Head Temperature Sensor 1 Out Of Self Test Range: No Sub Type Information	This DTC sets when the CHT sensor is out of self-test range. The engine is not at a normal operating temperature.
PCM P1021:00	Cylinder Head Temperature Sensor 2 Circuit Range/Performance: No Sub Type Information	Sets when the PCM detects the cylinder head temperature value is higher than the calibrated value and could prevent one or more OBD monitors from completing. The PCM runs this logic after an engine off and a calibrated soak period (typically 6 hours). This soak period allows the intake air temperature and the cylinder head temperature to stabilize and not differ by greater than a calibrated value. This DTC sets when all of the following conditions are met: The cylinder head temperature at engine start exceeds the intake air temperature at engine start by greater than a calibrated value, typically 17°C (30°F). The cylinder head temperature exceeds a calibrated value, typically 107°C (225°F). The fuel system, heated oxygen and misfire monitors have not completed. The calibrated time to set this DTC has expired. Make sure the intake air temperature and the cylinder head temperature are similar when the engine is cold.Make sure the intake air temperature and the cylinder head temperature are similar when the engine is cold. Also make sure the CHT sensor and the actual engine operating temperatures are the same.Also make sure the CHT sensor and the actual engine operating temperatures are the same.
PCM P1022:00	Cylinder Head Temperature Sensor 2 Circuit Low: No Sub Type Information	Sets when the PCM detects a Cylinder Head Temperature 2 (CHT2) circuit concern is present.
PCM P1023:00	Cylinder Head Temperature Sensor 2 Circuit High: No Sub Type Information	Sets when the PCM detects a Cylinder Head Temperature 2 (CHT2) circuit concern is present.
PCM P1024:00	Cylinder Head Temperature Sensor 2 Circuit Intermittent/Erratic: No Sub Type Information	Sets when the PCM detects a Cylinder Head Temperature 2 (CHT2) circuit concern is intermittently present while the engine is running.
PCM P1025:00	Cylinder Head Temperature Sensor 2 Out Of Self Test Range: No Sub Type Information	Sets when the PCM detects the CHT 2 sensor is out of self-test range. The engine is not at a normal operating temperature. Bring the engine to operating temperature and repeat the self-test. If the engine overheats, check the cooling system. Refer to the appropriate 303-03 section, Engine Cooling, to diagnose the engine overheats symptom.
PCM P1026:00	Engine Coolant Temperature 1 / Cylinder Head Temperature 2 Correlation: No Sub Type Information	Sets when the PCM detects the ECT and Cylinder Head Temperature 2 (CHT2) sensor readings differ by greater than a calibrated value. Make sure the ECT and CHT 2 sensor readings are within 17ºC (30ºF) of each other after 6 hours at ambient temperature.
PCM P1285:00	Cylinder Head Overtemperature Condition: No Sub Type Information	Sets when the PCM detects an engine overheat condition was sensed by the CHT sensor.
PCM P1288:00	Cylinder Head Temperature Sensor Out Of Self Test Range: No Sub Type Information	Sets when the PCM detects the CHT sensor is out of self-test range. The engine is not at a normal operating temperature. Bring the engine to operating temperature. If cold, repeat the self-test. If the engine overheats, check the cooling system. Refer to the appropriate 303-03 section, Engine Cooling, The Engine Overheats for cooling system diagnosis.
PCM P1289:00	Cylinder Head Temperature Sensor Circuit High: No Sub Type Information	Sets when the PCM detects a CHT circuit open concern is present. The DTC P0118 may also set when this DTC sets.
PCM P128A:00	Cylinder Head Temperature Sensor Circuit Intermittent/Erratic: No Sub Type Information	Sets when the PCM detects the CHT circuit is intermittently open or short while the engine is running.
PCM P1290:00	Cylinder Head Temperature Sensor Circuit Low: No Sub Type Information	Sets when the PCM detects a CHT circuit short to ground concern is present. The DTC P0117 may also set when this DTC sets.

Possible Sources

ECT sensor circuitry concern
CHT sensor circuitry concern
Base engine concerns
Engine cooling system concerns
ECT sensor
CHT sensor (6G004)
PCM (12A650)

PINPOINT TEST DX: ENGINE COOLANT TEMPERATURE (ECT) SENSOR

Introduction

NOTE: Engine coolant temperature must be greater than 10°C (50°F) to pass the KOEO self-test and greater than 82°C (180°F) to pass the KOER self-test.

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

Voltage values calculated for VREF equals 5 volts. These values may vary by 15% due to sensor and VREF variations.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0116:00	Engine Coolant Temperature Sensor 1 Circuit Range/Performance: No Sub Type Information	Sets when PCM detects the engine coolant temperature or cylinder head temperature value is higher than the calibrated value and could prevent one or more OBD monitors from completing. The PCM runs this logic after an engine off and a calibrated soak period (typically 6 hours). This soak period allows the intake air temperature and the engine coolant temperature or cylinder head temperature to stabilize and not differ by greater than a calibrated value. This DTC sets when all of the following conditions are met: The engine coolant temperature at engine start exceeds the intake air temperature at engine start by greater than a calibrated value, typically 17°C (30°F). The engine coolant temperature exceeds a calibrated value, typically 107°C (225°F). The fuel system, heated oxygen and misfire monitors have not completed. The calibrated time to set this DTC has expired. Make sure the intake air temperature and the engine coolant temperature or cylinder head temperature are similar when the engine is cold. Also make sure the .ECT or CHT sensor and the actual engine operating temperatures are the same.
PCM P1116:00	Engine Coolant Temperature Sensor Out Of Self Test Range: No Sub Type Information	Sets when the PCM detects the ECT sensor is out of self-test range. The correct range is 0.3 to 3.7 volts. The engine coolant temperature must be greater than 10°C (50°F) to pass the KOEO self-test and greater than 82°C (180°F) to pass the KOER self-test.
PCM P0117:00	Engine Coolant Temperature Sensor 1 Circuit Low: No Sub Type Information	Sets when PCM detects the ECT sensor signal is less than the self-test minimum. The ECT sensor signal minimum is 121º C (250º F). A concern is present if the ECT (TEMP) PID reading is greater than 121º C (250º F) with the ignition ON engine OFF or during any engine operating mode.
PCM P0118:00	Engine Coolant Temperature Sensor 1 Circuit High: No Sub Type Information	Sets when PCM detects the ECT sensor signal is greater than the self-test maximum. The ECT sensor signal maximum is -50º C (-58º F). A concern is present if the ECT (TEMP) PID reading is less than -50º C (-58º F) with the ignition ON engine OFF or during any engine operating mode.
PCM P0119:00	Engine Coolant Temperature Sensor 1 Circuit Intermittent/Erratic: No Sub Type Information	Sets when PCM detects the ECT circuit is intermittently open or shorted while the engine is running.
PCM P011E:00	Engine Coolant Temperature 1 / Ambient Air Temperature Correlation: No Sub Type Information	Sets when PCM detects the ECT and ambient air temperature sensor readings differ by greater than a calibrated value. Make sure the ECT sensor, ambient air temperature sensor and IAT sensor readings are within 18ºC (32.4ºF) of each other after 6 to 8 hours at a stabilized ambient temperature and the vehicle has not been in direct sunlight.
PCM P1117:00	Engine Coolant Temperature Sensor Circuit Intermittent: No Sub Type Information	Sets when PCM detects the ECT circuit is intermittently open or short while the engine is running.
PCM P111B:00	Engine Coolant Warm-up Not Detected: No Sub Type Information	Sets when PCM detects the the engine coolant temperature does not rise by a calibrated threshold value when compared to the inferred ECT . Verify the engine cooling system is operating correctly. Refer to the appropriate 303-03 section, Engine Cooling.

Possible Sources

Low engine coolant
Cooling system concern
ECT or CHT sensor circuitry concern
Coolant bypass valve
Thermostat
Ambient air temperature sensor
CHT sensor
ECT sensor (12A648)
PCM (12A650)

Diagnosis and Testing - Engine Cooling

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