Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
Powertrain DTC Charts and Descriptions 4-103
Diagnostic Trouble Code (DTC) Charts and Descriptions
P1101 - Mass Air Flow (MAF) Sensor Out Of Self-Test Range (Continued)
Diagnostic Aids: Diagnose circuit DTCs before range or performance DTCs.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P1112 - Intake Air Temperature (IAT) Circuit Intermittent
Description: This DTC sets when the IAT sensor signal is intermittent.
Possible Causes: • IAT circuit intermittent open
• IAT circuit intermittent short to voltage
• IAT circuit intermittent short to ground
• Damaged IAT sensor
• Damaged harness connector
• Damaged harness
Diagnostic Aids: Monitor the IAT PID on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the
sensor is tapped.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DA.
P1116 - Engine Coolant Temperature (ECT) Sensor Out Of Self-Test Range
Description: This DTC sets when the ECT sensor is out of self-test range. The correct range is 0.3 to 3.7 volts.
Possible Causes: • Overheating condition
• Damaged thermostat
• Low engine coolant
Diagnostic Aids: The engine coolant temperature must be greater than 10°C (50°F) to pass the key ON engine OFF (KOEO)
self-test and greater than 82°C (180°F) to pass the key ON engine running (KOER) self-test.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
P1117 - Engine Coolant Temperature (ECT) Sensor Circuit Intermittent
Description: This DTC sets when the ECT circuit is intermittently open or short while the engine is running.
Possible Causes: • Damaged ECT harness or connector
• Damaged ECT sensor
• ECT circuit open
• ECT circuit short to ground
• Low engine coolant
Diagnostic Aids: Monitor the ECT PID on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the
sensor is tapped.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DX.
P111B - Engine Coolant Warm-Up Not Detected
Description: This DTC sets when the engine coolant temperature does not rise by a calibrated threshold value when
compared to the inferred engine coolant temperature.
Possible Causes: • Low engine coolant
• Damaged heater core shut off valve
• Damaged coolant bypass valve
• Damaged ECT sensor
Diagnostic Aids: Verify the engine cooling system is operating correctly. Refer to the Workshop Manual Section 303-03, Engine
Cooling.
Application Key On Engine Off Key On Engine Running Continuous Memory
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.