How to service an oxygen sensor?

The oxygen sensors in the exhaust system are placed to monitor exhaust gas stream oxygen content. Oxygen sensors are three in number. The two upstream sensors are located on the front and rear exhaust manifolds. The downstream sensor is located behind the catalytic converter. With each of these, varying in between 100 millivolts and 900 millivolts is produced by reaction of the respective oxygen content in the exhaust. The ECM uses this output voltage to determine the ideal air/fuel mixture. Controlling fuel injectors pulse width, the ECM changes air-fuel mixture ratio. To enable the catalytic converter operate at maximum efficiency, an ideal mixture consists of 14.7 parts of air to one part of fuel that will minimize exhaust emissions using it for oxidation purposes during chemical reactions on its surface which can also provide enough heat for complete combustion of unburned elements in order not to produce such pollutants again as nitrogen oxides (NOx). It is important that oxygen sensor remains hot when functioning properly; moreover within this initial period known as warm-up stage ECM operates under open loop control strategy. Four things must be right for proper functioning of an O2 sensor; Electrically speaking Outside air provision Right operating temperatures Unleaded gasoline As you work on your oxygen sensor do keep these things in mind too!! The unit has a permanent connection with a pigtail and connector which must not be removed from it because it can only cause damage or prevent normal operation from taking place so do not even try it! Keep grease, dirt and other foreign materials away from both electrical connector and louvered end of this device. Solvents can never be used to clean any kind of a thing from them! Do not drop or otherwise mishandle Sensor. For proper operation, silicone boot should be properly installed so as not to melt down or distort while doing its job correctly. Remove battery negative cable.

Genuine Cadillac Deville Oxygen Sensor

Oxygen O2 Sensor

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

10 Oxygen Sensors found

View related parts
Cadillac Deville Sensor,Heated Oxygen
Part Number: 12559850
$37.12 MSRP: $119.40
You Save: $82.28 (69%)
Ships in 1-2 Business Days

Out of Stock
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2003 Cadillac Deville | DEVILLE, HIGH LUXURY, SEVILLE, SLS, STS, TOURING 4 DOOR | 8 Cyl 4.6L
View related parts
Cadillac Deville Sensor Assembly, Heated Oxygen (Position 1)
Part Number: 12569429
$52.46 MSRP: $108.94
You Save: $56.48 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 Cadillac Deville | DEVILLE, FUNERAL COACH, HIGH LUXURY, LIMOUSINE, SEVILLE, STS, TOURING 4 DOOR, TOURING SEDAN | 8 Cyl 4.6L
View related parts
Cadillac Deville Sensor Asm,Heated Oxygen
Part Number: 19178958
$43.27 MSRP: $125.66
You Save: $82.39 (66%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Front Oxygen Sensor, Manifold, Oxygen Sensor
- Replaces: 25178022, 25312203, 25312211, 25164488
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1998 Cadillac Deville | 4 DOOR, SLS, STS | 8 Cyl 4.6L
View related parts
Cadillac Deville Sensor Assembly, Heated Oxygen (Position 2)
Part Number: 12567497
$67.71 MSRP: $123.09
You Save: $55.38 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 Cadillac Deville | DEVILLE, HIGH LUXURY, SEVILLE, STS, TOURING 4 DOOR, TOURING SEDAN | 8 Cyl 4.6L
View related parts
Cadillac Deville Sensor Asm,Oxygen
Part Number: 19211435
$51.22 MSRP: $164.76
You Save: $113.54 (69%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 05613719, 25165116, 19178940, 19178746, 25106169, 5613719, 25165119
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Cadillac Deville | 4 DOOR | 8 Cyl 4.9L
- 1987-1990 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, FUNERAL COACH, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 8 Cyl 4.1L, 8 Cyl 4.5L
- 1982-1984 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, FORMAL LIMOUSINE, LIMOUSINE | 8 Cyl 4.1L
View More
View related parts
Cadillac Deville Sensor Asm,Heated Oxygen<Do Not Use, Contact Tech Specialist
Part Number: 19355308
$62.98 MSRP: $130.76
You Save: $67.78 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR ASM,HTD OXY
- Replaces: 19178928, 25161131, 25312197
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1999 Cadillac Deville | 4 DOOR, SLS, STS | 8 Cyl 4.6L
View related parts
Cadillac Deville Sensor Asm,Heated Oxygen
Part Number: 19178939
$47.12 MSRP: $136.80
You Save: $89.68 (66%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 25132086, 25165311, 25312178
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Cadillac Deville | 4 DOOR | 8 Cyl 4.6L
View related parts
Cadillac Deville Sensor,Exhaust Oxygen
Part Number: 19211437
$18.54 MSRP: $33.26
You Save: $14.72 (45%)
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 19178952, 25171573, 25166816, 25171574, 25162693, 25106073, 25107378, 25165118, 25171581, 25132068, 25165120, 25162600, 19178953, 19178943, 25133185, 25133076, 19178919, 25162753
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1986 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 4 DOOR, BROUGHAM 4 DOOR FWD, FORMAL LIMOUSINE, FUNERAL COACH, LIMOUSINE, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 6 Cyl 4.1L, 8 Cyl 4.1L
View related parts
Cadillac Deville Sensor Asm,Heated Oxygen
Part Number: 19178945
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 25315373
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999 Cadillac Deville | DEVILLE, SLS, STS | 8 Cyl 4.6L
View related parts
Cadillac Deville Sensor Assembly, Heated Oxygen
Part Number: 12559849
$58.44 MSRP: $104.83
You Save: $46.39 (45%)
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2003 Cadillac Deville | DEVILLE, HIGH LUXURY, SEVILLE, SLS, STS, TOURING 4 DOOR | 8 Cyl 4.6L

Cadillac Deville Oxygen Sensor

Cadillac DeVille vehicles Oxygen Sensor monitors the air/fuel mixture in the engine exhaust to enhance the engine's performance besides restricting emissions. Despite the unit's high cost, the sensor features a zirconium dioxide sensing element with a platinum coating that converts the mixture's condition into a voltage signal, indicating richness or leanness. This feedback enables the engine control system work in the closed- loop manner and fine tune the air-fuel mixture to ensure the catalytic converter is functioning at its premier. Cadillac DeVille vehicles, as with many other automobiles, usually possess two oxygen sensors with the upstream sensor as the primary feedback supplier to the controller while the downstream is positioned after the catalytic converter. Contamination of the sensor may eventually occur and this will result in high emission together with low fuel economy. Some newer vehicles use what is described as an air fuel ratio sensor in place of the more conventional oxygen sensor; this new kind of sensor has a broader range of input and measures the air/fuel ratio more effectively.

Each OEM Cadillac Deville Oxygen Sensor we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Cadillac Deville Oxygen Sensor Parts Questions & Experts Answers

Sensor Assembly, Heated Oxygen (Position 1)
12569429
Q: How to service an oxygen sensor?
A: The oxygen sensors in the exhaust system are placed to monitor exhaust gas stream oxygen content. Oxygen sensors are three in number. The two upstream sensors are located on the front and rear exhaust manifolds. The downstream sensor is located behind the Catalytic Converter. With each of these, varying in between 100 millivolts and 900 millivolts is produced by reaction of the respective oxygen content in the exhaust. The ECM uses this output voltage to determine the ideal air/fuel mixture. Controlling fuel injectors pulse width, the ECM changes air-fuel mixture ratio. To enable the catalytic converter operate at maximum efficiency, an ideal mixture consists of 14.7 parts of air to one part of fuel that will minimize exhaust emissions using it for oxidation purposes during chemical reactions on its surface which can also provide enough heat for complete combustion of unburned elements in order not to produce such pollutants again as nitrogen oxides (NOx). It is important that oxygen sensor remains hot when functioning properly; moreover within this initial period known as warm-up stage ECM operates under open loop control strategy. Four things must be right for proper functioning of an O2 sensor; Electrically speaking Outside air provision Right operating temperatures Unleaded gasoline As you work on your oxygen sensor do keep these things in mind too!! The unit has a permanent connection with a pigtail and connector which must not be removed from it because it can only cause damage or prevent normal operation from taking place so do not even try it! Keep grease, dirt and other foreign materials away from both electrical connector and louvered end of this device. Solvents can never be used to clean any kind of a thing from them! Do not drop or otherwise mishandle Sensor. For proper operation, silicone boot should be properly installed so as not to melt down or distort while doing its job correctly. Remove battery negative cable.