1990 Eagle Talon Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Oxygen Sensor (2.0L)

  1. Oxygen sensor is located at outlet of exhaust manifold or turbocharger. Warm engine until coolant temperature reaches 185-205°F (85-95°C).
  2. Disconnect oxygen sensor connector. Using an ohmmeter, measure resistance between oxygen sensor terminals No. 1 and 4. See Fig 1 .
  3. A cold oxygen sensor should read approximately 12 ohms resistance with an oxygen sensor temperature 68°F (20°C). A hot oxygen sensor should read 30 ohms or more resistance with an oxygen sensor temperature of 752°F (400°C).
  4. If oxygen sensor resistance is not within specification, repalce oxygen sensor. If resistance is okay, go to next step.
    CAUTION: Damage to oxygen sensor may result if battery voltage is applied to wrong oxygen sensor terminals.
  5. Apply battery voltage across oxygen sensor terminals No. 3 and 4. Connect a digital voltmeter ot oxygen sensor terminals No. 1 and 2. See Fig 1 .
  6. With engine running at more than 1300 RPM, measure oxygen sensor output voltage. Output voltage should be approximately one volt. If output voltage is not within specification, replace oxygen sensor.
    Fig 1: Oxygen Sensor Terminal Identification (2.0L)
    G90F06288Courtesy of DAIMLERCHRYSLER CORP.
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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.

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