GM Storm/Spectrum 1985-1993 Repair Guide

Oxygen Sensor



See Figure 1

The oxygen sensor uses a permanently attached pigtail and connector. Do not attempt to remove this from the sensor or damage could occur. Trace the pigtail back to locate the wiring harness connector.

  1. The sensor may be difficult to remove when the engine temperature is below 120°F (60°C). If necessary, start and warm the engine before removing the sensor, BUT BE VERY CAREFUL. The oxygen sensor is threaded into the exhaust system and will be extremely hot if the engine was run recently. Always use proper protective gloves to prevent burns.
  3. Disconnect the negative battery cable.
  5. Unplug the wiring harness from the sensor pigtail connector.
  7. Carefully loosen the sensor, making sure not to force and damage the threads, exhaust manifold or pipe.

The inline electrical connector and louvered end of the sensor must be kept free of dirt, grease or other contaminants. Also, avoid using cleaning solvents of any type. The sensor must not be dropped or handled roughly in any way.

  1. To install, reverse the removal procedure. New sensors will have an anti-seize compound already applied to the threads. If reinstalling a sensor, be sure to apply anti-seize ONLY to the threaded portion of the sensor.
  3. Tighten the sensor to 30 ft. lbs. (41 Nm).

Click image to see an enlarged view

Fig. Fig. 1: The oxygen sensor is threaded into the exhaust manifold or pipe - 1.6L SOHC Storm engine shown