Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. For connector and terminal identification, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.

AIRFLOW METER HERTZ TEST ⁽¹⁾

Condition

1.8L

700 RPM

23-49

2000 RPM

51-91

⁽¹⁾	Measure hertz frequency with Multi-Use Tester (MUT-II).

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
32 (0)	5800
68 (20)	2400
104 (40)	1100
176 (80)	300

EGR TEMPERATURE SENSOR RESISTANCE TEST ⁽¹⁾⁽²⁾

Temperature °F (°C)

Ohms

122 (50)

60-83

212 (100)

11-14

⁽¹⁾	Measure resistance across disconnected sensor terminals.

⁽²⁾	Specifications apply to all models.

INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
32 (0)	6000
68 (20)	2700
176 (80)	400

OXYGEN SENSOR VOLTAGE TEST ⁽¹⁾

Application

Volts

Lean

0.1

Rich

1.0

⁽¹⁾	Test at normal operating temperature.

When to See a Mechanic

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

• 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.

Safety Warning

Engine Controls - Sensor Operating Range Charts: Introduction: Notes

Use the Manual With the Right Hardware

When to See a Mechanic

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