2012 Ford Fiesta L4-1.6LFACTORY OEM SERVICE PROCEDURE

Computers and Control Systems




Engine Control Components - Exploded View

Factory service manual diagram




Camshaft Position (CMP) Sensor

NOTE: Lubricate the O-ring seals with clean engine oil.

Factory service manual diagram




Factory service manual diagram





Crankshaft Position (CKP) Sensor

Factory service manual diagram




Factory service manual diagram





Mass Air Flow (MAF) Sensor

Factory service manual diagram




Factory service manual diagram





Heated Oxygen Sensor (HO2S) Sensor

NOTE: If necessary, lubricate the HO2S (Heated Oxygen Sensor) with penetrating and lock lubricant to assist in removal.

NOTE: Apply anti-seize to the threads of the HO2S (Heated Oxygen Sensor) prior to installing.

NOTE: The correct torque wrench setting must be calculated when using a commercially available exhaust gas sensor socket to install the HO2S (Heated Oxygen Sensor).

Factory service manual diagram




Factory service manual diagram





Catalyst Monitor Sensor (CMS)

NOTE: If necessary, lubricate the CMS (Catalyst Monitor Sensor) with penetrating and lock lubricant to assist in removal.

NOTE: Apply anti-seize to the threads of the CMS (Catalyst Monitor Sensor) prior to installing.

NOTE: The correct torque wrench setting must be calculated when using a commercially available exhaust gas sensor socket to install the CMS (Catalyst Monitor Sensor).

Factory service manual diagram




Factory service manual diagram





Knock Sensor (KS)

NOTICE: The RH Knock Sensor (KS) must be installed in the 4 o'clock position and the LH KS (Knock Sensor) must be installed in the 11 o'clock position. Failure to follow these instructions may result in damage to the engine.

NOTE: The intake manifold must be removed to access the KS (Knock Sensor).

Factory service manual diagram




Factory service manual diagram





Engine Coolant Temperature (ECT) Sensor

NOTE: Drain the engine cooling system prior to removal of the ECT (Engine Coolant Temperature) sensor.

NOTE: Fill and bleed the engine cooling system after installing the ECT (Engine Coolant Temperature) sensor.

NOTE: The ignition coil must be removed to access the ECT (Engine Coolant Temperature) sensor. For additional information, refer to Ignition System.

Factory service manual diagram




Factory service manual diagram





Variable Camshaft Timing (VCT) Oil Control Solenoid

NOTE: Intake solenoid shown, exhaust solenoid similar.

NOTE: Lubricate the O-ring seals with clean engine oil.

Factory service manual diagram




Factory service manual diagram





Clutch Pedal Position (CPP) Switch

Factory service manual diagram




Factory service manual diagram





1. Refer to the procedures and/or exploded views for any Warnings, Notices, Notes, Materials, Specifications, and Special Tools. Items in the exploded views may not be listed in order of removal.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.