SC2 L4-1.9L DOHC VIN 7 (1996)
3. Remove connector position assurance (CPA) device and unplug rear heated oxygen sensor wiring harness from engine harness.
4. Remove rear heated oxygen sensor wiring harness from trough in converter heat shield by gently pulling wiring harness from its retaining clips.
Rear Oxygen Sensor
5. Remove rear heated oxygen sensor using Saturn tool SA9603E. If necessary, use a liquid penetrate before removing sensor.