How to test and replace an oxygen sensor on Cadillac ElDorado?

The oxygen sensor exists as a device producing electrical output through the detection of exhaust gas oxygen content and it finds residence inside the exhaust system usually in the manifold or downpipe adjacent to the catalyst. The sensor output voltage varies between zero and one volt which signals a lean mixture when decreased but indicates a rich mixture when increased; correct air-to-fuel ratios result in 0.4 to 0.6 voltmeter reading fluctuations. The initial sensor provides information about engine emissions before they enter the catalyst pathway and the second sensor evaluates these emissions after catalyst processing so the PCM receives overall catalyst performance data. The sensor works at a specific temperature range and it begins OPEN LOOP operation before transit to CLOSED LOOP control when the engine reaches operating temeprature. During CLOSED LOOP mode the PCM adjusts air-fuel ratios according to detected sensor inputs. Quick CLOSED LOOP operation becomes possible when a heated oxygen sensor regulates its operating temperature at its optimal level. Sensor testing requires inspecting its visual state as well as verifying its air supply and examining fuel injectors and fuel pressure levels before investigating vacuum and exhaust leaks together with other potential issues. Engine warming up followed by battery disconnection allows the user to use a special socket for sensor separation while applying anti-seize compound to threads before applying gravitational torque for reinstallation.

Genuine Cadillac Eldorado Oxygen Sensor

Oxygen O2 Sensor

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7 Oxygen Sensors found

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Cadillac Eldorado Sensor,Heated Oxygen
Part Number: 12559850
$58.53 MSRP: $119.40
You Save: $60.87 (51%)
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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:
- 2000-2002 Cadillac Eldorado | ELDORADO | 8 Cyl 4.6L
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Cadillac Eldorado Sensor Asm,Heated Oxygen
Part Number: 19178958
$64.08 MSRP: $130.72
You Save: $66.64 (51%)
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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 Eldorado | ELDORADO | 8 Cyl 4.6L
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Cadillac Eldorado Sensor Asm,Oxygen
Part Number: 19211435
$52.59 MSRP: $164.76
You Save: $112.17 (69%)
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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:
- 1987-1993 Cadillac Eldorado | COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.1L, 8 Cyl 4.5L, 8 Cyl 4.9L
- 1982-1985 Cadillac Eldorado | BIARRITZ, COMMERCIAL CHASSIS, ELDORADO | 8 Cyl 4.1L
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Cadillac Eldorado Sensor Asm,Heated Oxygen<Do Not Use, Contact Tech Specialist
Part Number: 19355308
$69.61 MSRP: $142.00
You Save: $72.39 (51%)
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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:
- 1996-1997 Cadillac Eldorado | ELDORADO | 8 Cyl 4.6L
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Cadillac Eldorado Sensor Asm,Heated Oxygen
Part Number: 19178939
$49.69 MSRP: $140.50
You Save: $90.81 (65%)
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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 Eldorado | ELDORADO | 8 Cyl 4.6L
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Cadillac Eldorado 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 Eldorado | BIARRITZ, COMMERCIAL CHASSIS, ELDORADO | 6 Cyl 4.1L, 8 Cyl 4.1L
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Cadillac Eldorado 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 Eldorado | ELDORADO | 8 Cyl 4.6L

Cadillac Eldorado Oxygen Sensor

The Oxygen Sensor is a crucial component of Cadillac Eldorado cars as it regulates the amount of remaining oxygen in the exhaust emissions so as to enhance the proportionate mixture of air and fuel in the vehicles for superior performance and less polluting of the environment. It produces a voltage signal in relation to the level of the oxygen present and this signal is used by the engine control computer to alter the pulse wide of the fuel injector. It also provides this engine function as a feedback system called 'Closed loop' thus improving the efficiency of the catalytic converter. Most Cadillac Eldorado versions use zirconium dioxide for oxygen sensors that can be either narrow-band or wide-band. The narrow-band sensors give the inputs in the form of rich/lean signals and the wide-band sensors give a wider range inputs of the air-fuel mixture. The main difference is in the work range and the method of signal generation, and the sensors of the wide band provide more accurate information. However, they get contaminated with time and thereby cause higher emissions and a potential problem with the vehicle's performance.

Each OEM Cadillac Eldorado 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 Eldorado Oxygen Sensor Parts Questions & Experts Answers

Sensor Asm,Oxygen
19211435
Q: How to test and replace an oxygen sensor on Cadillac ElDorado?
A: The oxygen sensor exists as a device producing electrical output through the detection of exhaust gas oxygen content and it finds residence inside the exhaust system usually in the manifold or downpipe adjacent to the catalyst. The sensor output voltage varies between zero and one volt which signals a lean mixture when decreased but indicates a rich mixture when increased; correct air-to-fuel ratios result in 0.4 to 0.6 voltmeter reading fluctuations. The initial sensor provides information about engine emissions before they enter the catalyst pathway and the second sensor evaluates these emissions after catalyst processing so the PCM receives overall catalyst performance data. The sensor works at a specific temperature range and it begins OPEN LOOP operation before transit to CLOSED LOOP control when the engine reaches operating temeprature. During CLOSED LOOP mode the PCM adjusts air-fuel ratios according to detected sensor inputs. Quick CLOSED LOOP operation becomes possible when a heated oxygen sensor regulates its operating temperature at its optimal level. Sensor testing requires inspecting its visual state as well as verifying its air supply and examining fuel injectors and fuel pressure levels before investigating vacuum and exhaust leaks together with other potential issues. Engine warming up followed by battery disconnection allows the user to use a special socket for sensor separation while applying anti-seize compound to threads before applying gravitational torque for reinstallation.