Question about 2004 Cadillac Deville
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Posted on Jan 02, 2017
hi im wesall o2 sensors are located in the exaust system yours has one before the converter one after if it has duall exaust before the cat on drivers side will be upstream sensor bank 1 after cat right side will be bank 2 sensor 2
ps please rate me
Posted on Mar 28, 2009
SOURCE: change oxygen sensor
Under hood, center, front engine area, above exhaust
pipe flange, mounted in exhaust manifold
Under hood, center, rear engine area, above exhaust pipe flange, mounted in exhaust manifold
The oxygen sensor may be difficult to remove when the engine temperature is below 120°F (48°C). Excessive force may damage the threads in the exhaust manifold of exhaust pipe.
NOTE A special anti-seize compound is used on the oxygen sensor threads. The compound consists of liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If an oxygen sensor is removed from the engine and if for any reason, it is to be reinstalled, the threads must have this anti-seize compound applied before installation.
Fig. Location of the rear O2 sensor
Fig. Location of the the front O2 sensor
Fig. Use a wrench or special socket to loosen the O2 sensor
Fig. When replacing or reinstalling an oxygen sensor, be sure to lube the threads sufficiently
Posted on Jan 19, 2010
Your Elantra has more than one oxygen sensor. There is a pre-catalyst sensor and a post-catalyst sensor. Both can be found on the exhaust. You simply disconnect the sensor wire and remove the sensor plug with the proper size deep socket. Be sure you have the correct sensor for replacement.
Because of the heat involved with the exhaust, make sure the engine is cool before attempting to remove and replace the sensors. They may be tough to remove so a shot of WD-40 or 5-56 spray may need to soak into the threads to ease removal. When you replace the new sensors, a coating of anti-seize will be helpful for future removal.
Keep in mind that one malfunctioning sensor can send information that will set off codes on other sensors "downstream" or send codes from other emission controls on the engine.
Posted on Apr 26, 2010
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