All this work is done from under the car. There are two sensors on the S70. One is called the upstream( located higher up on the exhaust manifold) and the other would be the downstream. They are located on the exhaust pipe prior to the cat. converter. Unscrew the sensor (need to borrow a special tool) and follow the wire up around the engine to a small connector. Be sure to use anti-seize grease around the threads of the new O2 sensor(s). rcal13a@Yahoo.com
To replace the O2 sensor in a Volvo S70, first, ensure the engine is cool and disconnect the negative battery terminal. Locate the O2 sensor, which is typically found on the exhaust manifold or in the exhaust pipe. Use a socket wrench to unscrew the old sensor, then install the new sensor by threading it in and tightening it securely. Finally, reconnect the battery terminal and clear any error codes if necessary.
Upstream O2 sensor is located on the first muffler pipe coming out of the engine. This sensor can be found after you open the whood and look directly behind the engine. The sensor is connected to a wire and will end on electric connection to your computer.
Unless you have a set of torches then you will never get them out. Also when you pull them out they will usually take the threads with them unless you can get it really hot.
To change an O2 sensor you need to disconnect the wiring harness from the sensor. Use an O2 sensor socket and ratchet set to remove the old sensor and replace with the new one.
to change o2 sensor ,you need to buy a o2 sensor socket from a parts store then disconnect neg terminal on battery ,after that disconnect wire connecter on o2 sensor and remome o2 sensor
You will have the check engine light on. Oxygen sensors throw very specific codes. Basically you need to use an error code reader. I did and it said the o2 sensor, in my Volvo 2001 s40 has two of them and I need to know which one to change?
To replace the O2 sensor on a 1993 Volvo 240, first, locate the sensor, which is typically found on the exhaust manifold or downpipe. Disconnect the electrical connector and use an O2 sensor socket or wrench to unscrew the old sensor. Install the new sensor by threading it into the same location, tightening it securely, and then reconnecting the electrical connector. Finally, start the engine and check for any error codes or issues.
The bad one.
No, the spark plugs and O2 sensor are totally different things. that is not right!! they are the same things!!
A person can get a wiring diagram for a Volvo S40, O2 sensor at most auto part stores. A Volvo dealership will also be able to help you with a wiring diagram.
On a 2002 Volvo S80, the bank 1 sensor 2 O2 sensor is located downstream of the catalytic converter on the driver's side of the vehicle. It is positioned before the exhaust pipe exits the vehicle. To access it, you may need to lift the car and work from underneath, as it is not easily visible from the top.
O2 sensor/leaky injecters/fuel pressure regulator.