Here are their locations:
O2 sensor (upstream/before cat.)
- Behind the engine.
- Between the firewall and the right driveshaft.
- Installed into the exhaust manifold by one retaining bolt.
- Has one electrical connector with blue or blue and white connector wires.
O2 sensor (downstream/after cat.)
- In front of the transmission.
- Connected to bottom of exhaust system to the end of the catalytic converter.
- Secured with two bolts, one nut and a clamp bracket.
- Has one electrical connector with red and black connector wires.
