depends on the kind of car
o2 sensor
Oxygen sensor is considered part of the emissions management system, the crankshaft sensor is considered part of the electronic control system. So NO on both
Your O2 sensor is a "part that is designed to wear out". there is no standard on replacing them, but if your car is running fine, and your check engine light comes on, and stays on, it's probably an O2 sensor.
Unfortunately there is no fixing an O2 sensor. If the "check engine" light is on due to an O2 sensor, it can only be remedied by replacing the bad sensor.
An O2 (oxygen) sensor measures the amount of oxygen in the exhaust of an engine. The computer uses this information to calculate how much fuel to give the engine.
A bad O2 sensor could cause the engine to overcompensate for what it believes to be a problem. It will tell the engine to let in more or less O2 and could damage the engine in the long run. The sensor is not too expensive to replace and could save you LOTS of money in the future.
A defective O2 sensor will not prevent the engine from starting. The engine will start and run albeit not as it should.
Where is the O2 sensor located for a 2007 ford F150 with a 5.4 engine?Read more: Where_is_the_O2_sensor_located_for_a_2007_ford_F150_with_a_5.4_engine
The O2 sensor on a Toyota Corolla is located on the exhaust manifold. The O2 sensor properly reads the air fuel ratio to tell the engine how much fuel to use.
O2 sensor? Hey its a part and parts wear out. Oil additives or fuel additives can ruin an O2 sensor as well.
bad O2 sensor
it refers to the location of the oxygen (o2) sensors relative to the engine. The upstream sensor is the one closest to the engine. The downstream sensor is furthest from the engine. Think of it as the way a stream of water, or in this case, a stream of exhaust flows.... From the engine To the tailpipe.