Removal & Installation - Ford Ranger Maintaince And Repair Manual

REMOVAL & INSTALLATION
1996−99 Explorer/Mountaineers use four heated oxygen sensors (HO2S), and V6 equipped Rangers use
three HO2S's, and 2.3L and 2.5L engines use two HO2S's for the engine control system. The heated
sensors are located before and after the dual converters in the exhaust pipes. On 5.0L and 1991−95
engines V6 engines, there are two sensors, one is located in the left exhaust manifold and the other in
the dual converter Y−pipe. 1991−95 2.3L engines use only one sensor.
1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle on jackstands.
From underneath, locate the oxygen sensor (arrow), which is screwed into an exhaust
3. Disconnect the HO2S from the engine control sensor wiring.
If excessive force is needed to remove the sensors, lubricate the sensor with penetrating oil prior to
removal.
Using the proper wrench, loosen the oxygen sensor. Ensure that the wire and connector are
REMOVAL & INSTALLATION
HOW TO USE THIS BOOK
component
unplugged
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