2008 Kia Rio SX, AutomaticFACTORY OEM SERVICE PROCEDURE

Input Sensors

MASS AIR FLOW SENSOR (MAFS) 

Type: Hot-Film Type

MASS AIR FLOW SENSOR SPECIFICATIONS

Air Flow Output Voltage (V)
kg/h lb/min
4.9 0.18 0.7V
7.3 0.27 0.9V
12.2 0.45 1.18V
20.8 0.76 1.51V
28.3 1.04 1.73V
38.9 1.43 1.97V
64.7 2.38 2.4V
113.3 4.16 2.9V
185.3 6.81 3.35V
256.0 9.40 3.64V
404.6 14.87 4.07V
476.7 17.50 4.25V
603.3 22.17 4.56V

INTAKE AIR TEMPERATURE SENSOR (IATS) 

Type: Thermistor type

INTAKE AIR TEMPERATURE SENSOR SPECIFICATIONS

Temperature Resistance (kΩ)
°C °F
-40°C -40°F 41.26-47.49 kΩ
-20°C -4°F 14.26-16.02 kΩ
0°C 32°F 5.50-6.05 kΩ
20°C 68°F 2.35-2.54 kΩ
40°C 104°F 1.11-1.19 kΩ
60°C 140°F 0.57-0.60 kΩ
80°C 176°F 0.31-0.32 kΩ

ENGINE COOLANT TEMPERATURE SENSOR (ECTS) 

Type: Thermistor type

ENGINE COOLANT TEMPERATURE SENSOR SPECIFICATIONS

Temperature Resistance (kΩ)
°C °F
-40°C -40°F 48.14 kΩ
-20°C -4°F 14.13-16.83 kΩ
0°C 32°F 5.79 kΩ
20°C 68°F 2.31-2.59 kΩ
40°C 104°F 1.15 kΩ
60°C 140°F 0.59 kΩ
80°C 176°F 0.32 kΩ

THROTTLE POSITION SENSOR (TPS) 

Type: Variable resistor type

THROTTLE POSITION SENSOR SPECIFICATIONS

Throttle Angle Output Voltage (V)
C.T 0.2-0.7V
W.O.T Min. 4.0V
ITEMS SPECIFICATIONS

Items Specification
Sensor Resistance (kΩ) 1.6-2.4 kΩ

HEATED OXYGEN SENSOR (HO2S) 

Type: Zirconia (ZrO2) Type

HEATED OXYGEN SENSOR SPECIFICATIONS

A/F Ratio Output Voltage (V)
Rich 0.6-1.0V
Lean 0-0.4V
ITEMS SPECIFICATIONS

Items Specification
Heater Resistance (Ω) Approximately 9.0Ω at 20 °C (68°F)

CAMSHAFT POSITION SENSOR (CMPS) 

Type: Hall effect type

CRANKSHAFT POSITION SENSOR (CKPS) 

Type: Magnetic field sensitive Type

KNOCK SENSOR (KS) 

Type: Piezo-electricity type

KNOCK SENSOR SPECIFICATIONS

Items Specification
Capacitance (pF) 950-1,350pF
Resistance (MΩ) 4.87MΩ

FUEL TANK PRESSURE SENSOR (FTPS) 

Type: Piezo-Resistivity type

FUEL TANK PRESSURE SENSOR SPECIFICATIONS

Pressure (kPa) Output Voltage (V)
-6.67 kPa 0.5V
0 kPa 2.5V
6.67 kPa 4.5V
Factory Service Tools

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

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