MONITOR DESCRIPTION The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air fuel ratio sensor, sends pre-catalyst information to the ECM. The second sensor, the heated oxygen sensor, sends post-catalyst informat
INSTALLATION PROCEDURE 1. INSTALL EXHAUST PIPE DAMPER (a) Install the exhaust pipe damper with the 2 bolts. Torque: 19 N·m {194 kgf·cm, 14 ft·lbf} 2. INSTALL HEATED OXYGEN SENSOR Click here 3. INSTALL FRONT EXHAUST PIPE ASSEMBLY (a) Using a vernier caliper, measure the free length of the co