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Home >> Chevrolet >> 1988 >> Sprint Turbo >> Repair and Diagnosis >> Engine Performance >> System >> EFI Turbo >> Testing >> Component Testing >> Oxygen (O2) Sensor

Oxygen (O2) Sensor

  1. Disconnect O2 sensor connector. Connect a high impedance or digital voltmeter to O2 sensor lead. With engine warm and running above 3000 RPM, O2 sensor voltage should exceed .7 volts.
  2. With engine at idle and a vacuum hose remove to allow a lean mixture, voltage of O2 sensor should be zero volt.
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