CAUTION: Never apply any type of grease to the oxygen sensor electrical connector, or attempt any soldering of the sensor wiring harness.
WARNING: The exhaust manifold, exhaust pipes and catalytic converter become very hot during engine operation. Allow engine to cool before removing oxygen sensor.
Sensor (1) is referred to as the 2/2 sensor. Sensor (2) is referred to as the 1/2 sensor.
Sensor (1) is referred to as the 1/1 sensor. Sensor (2) is referred to as the 1/2 sensor.
CAUTION: When disconnecting sensor electrical connector, do not pull directly on wire going into sensor.