The emissions development of most contemporary vehicles manipulate a Element confessed as an O2 sensor To gauge the immensity of O2 in the engine exhaust. This sensor transmits data to the vehicle's computer, which adjusts the fuel/air mixture while the engine is running. This helps the engine to run at peak efficiency, thereby reducing the pollutants in the exhaust.4. Back out the sensor by rotating it counterclockwise with the oxygen sensor socket and ratchet. It will likely be very tight in the mounting hole and require firm pressure to back it out.
Park the Caravan and set the parking brake. Shut off the engine and open the hood. Let the engine and exhaust system cool completely to avoid burns.
2. Locate the first, or upstream, oxygen sensor, which is threaded into the exhaust manifold in the rear engine area above the exhaust pipe flange. (The second, or downstream, sensor is seated in the exhaust pipe below the catalytic converter.)
3. Disconnect the sensor wire by separating the electrical connectors of the sensor wire and the vehicle wire.
Many vehicles have more than one oxygen sensor, as is the case with the Dodge Caravan V-6, which has two. Oxygen sensors should be replaced periodically, a job that many DIY mechanics can handle.
Instructions
1.5. Insert the new sensor in the hole and tighten securely with the socket. Connect the sensor wire to the connector on the vehicle.
