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Home >> Mazda >> 1986 >> B2000 Base, 2D Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System - 2.0L >> Trouble Shooting >> Oxygen Sensor
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Oxygen Sensor

  1. Warm engine to normal operating temperature and run engine at idle speed. Connect a Mulitmeter or Megameter between oxygen sensor connector (sensor side) and ground.
  2. Increase engine speed to 4000 RPM until reading indicates .7 volt. Increase and decrease engine RPM suddenly several times. When engine RPM is increased, reading should be .5-1.0 volt.
  3. When engine RPM is decreased, reading should be 0-.3 volt. If readings are not as specified, replace oxygen sensor.
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