KIA Niro: Mass Air Flow Sensor (MAFS)

Description

MAFS uses a sensing element made of a hot-film to measure the mass of intake air entering the engine
and to send the signal to the ECM.

A large amount of intake air represents acceleration or high load conditions while a small amount of
intake air represents deceleration or idle.

The ECM uses this information to control the EGR solenoid valve and correct the fuel amount.

Circuit Diagram

Circuit Diagram

Harness Connector

Harness Connector

Mass Air Flow Sensor (MAFS) Repair procedures

Mass Air Flow Sensor (MAFS) Repair procedures

Inspection

  1. Visually check the MAFS for the following:
  • Correct mounting direction
  • Any contamination, corrosion or damage on connector
  • Clogged or wet air cleaner
  • Deformation or blocked MAFS cylinder by foreign material
  1. Check for any leakage on intake system and intercooler system.

Removal

  1. Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
  2. Disconnect the mass air flow sensor connector (A) and the installation clamp (B).
  3. Remove the mass air flow sensor (C).

Mass air flow sensor mounting bolt : 3.9 - 5.8 N*m (0.4 - 0.6 kgf*m, 2.8 - 4.3 lb*ft) Mass air flow sensor clamp mounting screw : 2.9 - 4.9 N*m (0.3 - 0.5 kgf*m, 2.2 - 3.6 lb*ft)

Installation

Installation

Warning

  • Install the component to the specified torque.
  • Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.

Warning

Be careful not to damage the sensing element and the honey cell.

  1. Install in the reverse order of removal.

    READ NEXT:

     Intake Air Temperature Sensor (IATS)

    Specification Description Mounted inside the Manifold Absolute Pressure Sensor, Intake Air Temperature Sensor (IATS) detects the intake air temperature. To precisely calculate the amount of air, correction of the air temperature is requ

     Engine Coolant Temperature Sensor (ECTS)

    Specification Description Located in the engine coolant passage of the cylinder head, Engine Coolant Temperature Sensor (ECTS) detects the engine coolant temperature. The ECTS uses a thermistor with resistance in proportion to the tempera

     Crankshaft Position Sensor (CKPS)

    Specification Crankshaft Position Sensor (CKPS) Description and operation Description Crankshaft Position Sensor (CKPS) is one of the most important sensors of the engine control system that detects the crankshaft position. Lack of CKPS sig

    SEE MORE:

     Remote Smart Parking Assist settings

    Remote Smart Parking Assist uses vehicle sensors to help the driver park and exit parking spaces remotely from outside the vehicle by controlling the steering wheel, vehicle speed and gearshifts. Remote Operation function may be operate

     Driver Attention Warning settings

    Driver Attention Warning (DAW) (if equipped) Basic function Driver Attention Warning can help determine the driver's attention level by analyzing driving pattern and driving time while the vehicle is driven. Driver Attention Warning will r

    Categories