The emissions management system within the 2000 Audi A4 makes use of an oxygen (O2) sensor to measure the quantity of oxygen within the engine exhaust. The sensor transmits this information to the automobile’s pc via an electrical wire. The pc interprets the info and makes changes to the air/fuel combination whereas the engine is working. This helps the engine function at peak effectivity, thereby lowering exhaust pollution. The O2 sensor requires periodic substitute, and many homeowners can change it themselves.
2000 Audi A4 Oxygen Sensor Installation Instructions
1. Park the automobile, set the parking brake, shut off the engine and open the hood. Await the engine and exhaust system to chill fully, earlier than continuing, to keep away from burns.
2. Find the sensors; there are two of them. The upstream is threaded into the exhaust manifold, which is within the lower engine space on the passenger’s facet, under the exhaust pipe flange and earlier than the catalytic converter. The downstream sensor is threaded into the exhaust pipe after the catalytic converter.
3. Spray penetrating lubricant on the base of every sensor and let it set in for half-hour earlier than continuing. It will assist loosen the sensor for simpler removing.
4. Unplug the sensor wire on the higher (upstream) sensor from the automobile’s connector. Again out the sensor by rotating it counterclockwise with a sensor socket and ratchet. Insert the brand new sensor into the opening and tighten it with the sensor socket, utilizing a clockwise rotation. Join the sensor wire to the connector on the car.
5. Repeat Step 4 for the lower (downstream) sensor.
Read more : How to Install an Oxygen Sensor in a 2000 Audi A4
