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catalytic convertor efficiency. Also used to establish REMOVAL REMOVAL - UPSTREAM 1/1 (1) Raise and support vehicle. foot wrench such as Snap-On tool YA8875 or equiva- (4) After removing the sensor, the exhaust mani- fold threads must be cleaned with an 18 mm X 1.5 + t 771-64 or equivalent. REMOVAL - DOWNSTREAM 1/2 The downstream heated oxygen sensor threads into the exhaust outlet pipe behind the catalytic convertor (1) Raise vehicle. along body. (4) Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equiva- (5) After removing the sensor, the exhaust mani- fold threads must be cleaned with an 18 mm X 1.5 + t 771-64 or equivalent. REMOVAL - 2.4L TURBO/2.4L SRT-4 (1) Disconnect the negative battery cable. It is on the passenger side near the EVAP purge sole- (3) Raise vehicle and support. sor crow foot wrench such as Snap-On tool YA8875 or INSTALLATION INSTALLATION - UPSTREAM 1/1 New sensors have compound on the threads and do not require an additional coating. Fig. 45 Upstream Heated Oxygen Sensor Removal/ Installation 1 - EXHAUST PIPE FLANGE Fig. 46 Downstream Heated Oxygen Sensor 1 - CATALYTIC CONVERTOR Fig. 47 Downstream Heated Oxygen Sensor Removal/Installation 1 - DOWNSTREAM HEATED OXYGEN SENSOR 14 - 42 FUEL INJECTION PL/SRT-4 O2 SENSOR (Continued) |