Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN1991JETTA L4-1984CC 2.0L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONEGR TEMPERATURE SENSORTESTING AND INSPECTION
1991 Volkswagen Jetta L4-1984cc 2.0L DOHC
EGR Temperature Sensor: Testing and Inspection
1991 Volkswagen Jetta L4-1984cc 2.0L DOHCSECTION Testing and Inspection
CALIFORNIA ONLY
1. Warm the engine to normal operating temperatures.
2. With the ignition "OFF", disconnect the intake air temperature sensor and measure the resistance between the 2 terminals of the sensor.
NOTE: It will be necessary to take an accurate measurement of the ambient air temperature within the intake manifold.
^ Refer to the intake air temperature graph for the correct measurement.
If the correct measurement is not obtained replace the intake air temperature sensor.
Intake Air Temperature Sensor:
1. Warm the engine to normal operating temperatures.
2. With the ignition "OFF", disconnect the intake air temperature sensor and measure the resistance between the 2 terminals of the sensor.
NOTE: It will be necessary to take an accurate measurement of the ambient air temperature within the intake manifold.
Intake Air Temperature Chart (EGR):
^ Refer to the intake air temperature graph for the correct measurement.
If the correct measurement is not obtained replace the intake air temperature sensor.
RENDER: 1.0x
NO RELATED
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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.