Diagnostic Aids
WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Never solder the O2S wires.
Inspect for an exhaust leak typically within 12" (30.5 cm) upstream of the O2S.