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.
DC: Mass Airflow (MAF) Sensor
DC: Introduction
DC1 VERIFY THE TYPE OF MAF SENSOR
Does the MAF/IAT sensor harness connector have 4 circuits?
Yes | No |
|---|---|
GO to DC15 . | GO to DC2 . |
DC2 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
Note: DTC P1101 can be generated by a low charged vehicle battery or the garage exhaust ventilation system. Charge the battery as necessary, then remove the ventilation system and correctly vent to the outside atmosphere.
Are DTCs P0101, P0102, P0103, P0104, P1100, or P1101 present?
Yes | No |
|---|---|
GO to DC3 . | For symptoms without DTCs, GO to DC3 . For all others, RETURN to Section 3 , Symptom Charts for further direction. |
DC3 CHECK THE INTAKE AIR SYSTEM FOR LEAKS, OBSTRUCTIONS, AND DAMAGE
Note: Visually inspect the vehicle for aftermarket accessories and performance modifications (exhaust system, turbocharger, performance chip). Refer to Section 1 Engine Control (EC) System, Modifications to OBD Vehicles.
• Ignition OFF.
• Check the intake air system (air cleaner, housing, and tubes) for obstructions or blockage.
• Check for broken or loose air outlet tube clamps, cracks or holes in the air outlet tube.
• Check for worn gaskets between the MAF/IAT sensor and the air cleaner assembly.
• Check that the MAF/IAT sensor connector is seated correctly.
• Check the throttle body bore for sludge.
• Check the positive crankcase ventilation (PCV) system for leaks and restrictions.
Is a concern present?
Yes | No |
|---|---|
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | GO to DC4 . |
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.