How does an oxygen sensor function as a galvanic battery to maintain the ideal air/fuel ratio for optimal catalytic converter performance on Cadillac Escalade?

An oxygen sensor is a galvanic battery that produces a current output proportional to the oxygen concentration in exhaust gases; it supplies the PCM with essential feedback to sustain the air/fuel equimolar of 14.7:1 to optimise operation of catalytic converter. On-Board Diagnostics II (OBD-II) engine management system fitted vehicles utilise two oxygen sensors, one pre and post catalytic converter to compare the efficiency of oxygen levels in the exhaust gas. All the models have four heated oxygen sensors, namely, cylinder bank sensors located on the exhaust pipe assembly and under the vehicle, each containing an upstream and downstream sensor. These sensors are heated to shorten the warm-up time the PCM actuates the heater circuit to provide correct voltage signal once the sensors are at operating temperature. Whenever it is being serviced, care must be taken since the sensors have permanently attached pigtails and electrical connectors that are very much vulnerable to damage, contamination, and mishandling. As for procedures of working with sensors, it is desirable to warm the engine when replacing the sensor because it makes it easy to remove, and the procedure includes the next steps: disconnect the electrical connector, unscrew the sensor with the help of a suitable sockets, apply anti-seize compound if the old sensor is used again, and check the tightness of the screws.

Genuine Cadillac Escalade Oxygen Sensor

Oxygen O2 Sensor

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26 Oxygen Sensors found

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Cadillac Escalade Sensor Assembly, Heated Oxygen(Pre, Catalyst Bank 1 Se)
Part Number: 12659516
$56.05 MSRP: $114.34
You Save: $58.29 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors
- Replaces: 12637679
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2015-2020 Cadillac Escalade | 1/2 TON, 1500 4 DOOR, 1500 4 DOOR SUV, 1500 4 DOOR UTILITY, 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 4 DOOR 1/2 TON, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX | 8 Cyl 6.2L
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Cadillac Escalade Sensor Assembly, Heated Oxygen (Pre, Catalyst Bank 2 S)
Part Number: 12666673
$44.37 MSRP: $90.52
You Save: $46.15 (51%)
Ships in 1-2 Business Days
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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:
- 2016-2020 Cadillac Escalade | 1500 4 DOOR, 1500 4 DOOR SUV, 1500 4 DOOR UTILITY | 8 Cyl 6.2L
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Cadillac Escalade Sensor Assembly, Heated Oxygen (Position 3)
Part Number: 12609457
$55.70 MSRP: $113.62
You Save: $57.92 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2014 Cadillac Escalade | 1/2 TON, EXT 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.2L Flex
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Cadillac Escalade Sensor,Heated Oxygen(Position 2)
Part Number: 12589321
$72.09 MSRP: $147.08
You Save: $74.99 (51%)
Ships in 1-3 Business Days
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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:
- 2007 Cadillac Escalade | EXT 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L
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Cadillac Escalade Sensor Assembly, Heated Oxygen (Position 2)
Part Number: 12583804
$57.06 MSRP: $116.40
You Save: $59.34 (51%)
Ships in 1-2 Business Days
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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:
- 2008-2014 Cadillac Escalade | 1/2 TON, EXT 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.2L Flex
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Cadillac Escalade Sensor,Heated Oxygen(Position 2)
Part Number: 12572705
$90.09 MSRP: $183.78
You Save: $93.69 (51%)
Ships in 1 Business Day
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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:
- 2003-2006 Cadillac Escalade | 1/2 TON, 3/4 TON, EXT 1/2 TON, EXT 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L
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Cadillac Escalade Sensor Asm,Heated Oxygen (Position 3)
Part Number: 19209808
$72.08 MSRP: $147.04
You Save: $74.96 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Replaces: 12575389, 19256731, 25333812, 12583806, 19210711, 12573168
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2006 Cadillac Escalade | 1/2 TON, 3/4 TON, EXT 1/2 TON, EXT 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L
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Cadillac Escalade Sensor,Heated Oxygen(Position 2)
Part Number: 12587785
$53.01 MSRP: $108.14
You Save: $55.13 (51%)
Ships in 1-2 Business Days
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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:
- 2003-2005 Cadillac Escalade | 1/2 TON, EXT 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L
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Cadillac Escalade Sensor Asm,Heated Oxygen (Position 3)
Part Number: 19209812
$72.38 MSRP: $147.66
You Save: $75.28 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 19210423, 25333817
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2005 Cadillac Escalade | 3/4 TON, EXT 3/4 TON | 8 Cyl 6.0L
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Cadillac Escalade Sensor Assembly, Htd Oxy (Post, Catalyst Bank 1)
Part Number: 12670253
$39.57 MSRP: $80.72
You Save: $41.15 (51%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Lower Oxygen Sensor, Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Cadillac Escalade | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 6.2L
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Cadillac Escalade Sensor Assembly, Htd Oxy (Pre, Catalyst Bank 2 S)
Part Number: 12687606
$40.88 MSRP: $83.40
You Save: $42.52 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Oxygen Sensor, Upper Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Cadillac Escalade | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 6.2L
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Cadillac Escalade Sensor,Heated Oxygen(Position 1)
Part Number: 12576131
$51.36 MSRP: $104.78
You Save: $53.42 (51%)
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:
- 2005 Cadillac Escalade | 1/2 TON, EXT 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L
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Cadillac Escalade Sensor Assembly, Heated Oxygen
Part Number: 12562943
$62.02 MSRP: $126.52
You Save: $64.50 (51%)
Ships in 1 Business Day
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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:
- 2002 Cadillac Escalade | EXT 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L
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Cadillac Escalade Sensor Assembly, Heated Oxygen
Part Number: 12565397
$67.45 MSRP: $137.61
You Save: $70.16 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 12563346
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Cadillac Escalade | EXT 1/2 TON, EXT 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 6.0L
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Cadillac Escalade Sensor Asm,Heated Oxygen (Position 2)
Part Number: 19178961
$61.70 MSRP: $124.77
You Save: $63.07 (51%)
Ships in 1 Business Day
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 25315809
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Cadillac Escalade | EXT 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L
View related parts
Cadillac Escalade Sensor Asm,Heated Oxygen
Part Number: 19178934
$71.75 MSRP: $146.38
You Save: $74.63 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor
- Replaces: 25312191, 25160540
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2000 Cadillac Escalade | 1/2 TON, 3/4 TON, 4 DOOR 1/2 TON, CLASSIC 4 DOOR 1/2 TON, CREW CAB 1 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, K2500 CREW CAB, K3500 CAB CHASSIS 135.5, K3500 CAB CHASSIS 159.9, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.7L
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Cadillac Escalade Sensor Asm,Heated Oxygen (Position 3)
Part Number: 19209815
$97.36 MSRP: $182.46
You Save: $85.10 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SENSOR, Computer Control Sensors; Oxygen Sensor, Rear Oxygen Sensor
- Replaces: 12590847
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 Cadillac Escalade | EXT 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 6.2L
View related parts
Cadillac Escalade Sensor Assembly, Htd Oxy(Pre, Catalyst Bank 1 Se)
Part Number: 12668435
$36.35 MSRP: $74.16
You Save: $37.81 (51%)
ADD TO CART
Product Specifications
- Other Name: Oxygen Sensor, Upper Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Cadillac Escalade | 1/2 TON, YUKON XL/DENALI XL/ESCALADE ESV, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 6.2L
View related parts
Cadillac Escalade Heated Oxygen Sensor Assembly
Part Number: 19355306
$62.34 MSRP: $126.08
You Save: $63.74 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Oxygen Sensor; Oxygen Sensor
- Replaces: 19178116, 25163080, 25312201
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002 Cadillac Escalade | EXT 1/2 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.3L, 8 Cyl 6.0L
- 1999-2000 Cadillac Escalade | 1/2 TON, 3/4 TON, 4 DOOR 1/2 TON, CLASSIC 4 DOOR 1/2 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, YUKON/DENALI/ESCALADE | 8 Cyl 5.7L
View related parts
Cadillac Escalade Sensor Assembly, Heated Oxygen
Part Number: 12565415
$54.56 MSRP: $170.94
You Save: $116.38 (69%)
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:
- 2002 Cadillac Escalade | EXT 3/4 TON

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1-20 of 26 Results

Cadillac Escalade Oxygen Sensor

The Oxygen Sensor on Cadillac Escalade vehicles is responsible for measuring the levels of the remaining oxygen in the exhaust gases, it enables optimization of air to fuel ratio as well as reducing the emission of gases. It provides a voltage signal in relation to the oxygen levels and the engine control computer is able to alter the fuel injector timing as a result. Most Cadillac Escalade models have at least two oxygen sensors, the first is located upstream of the catalytic converter, and the second checks the efficiency of the converter. Cadillac Escalade cars over the recent past have incorporated both the standard type of zirconia oxide oxygen sensors and the modern air to fuel ratio sensors. While traditional sensors offer a set of narrow bands which supplied signals to the ECU as to whether the mixture was rich or lean, the AF ratio sensor supplied a broad range of data for the handling of fuel mixture. Contamination and actual degradation over a period of time using up the special features and deteriorating the effectiveness of controlling emission. Oxygen Sensor requires to be checked frequently for it plays essential role in the Cadillac Escalade's engine system as is known.

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

Heated Oxygen Sensor
12657188
Q: How does an oxygen sensor function as a galvanic battery to maintain the ideal air/fuel ratio for optimal catalytic converter performance on Cadillac Escalade?
A:
An oxygen sensor is a galvanic battery that produces a current output proportional to the oxygen concentration in exhaust gases; it supplies the PCM with essential feedback to sustain the air/fuel equimolar of 14.7:1 to optimise operation of Catalytic Converter. On-Board Diagnostics II (OBD-II) engine management system fitted vehicles utilise two oxygen sensors, one pre and post catalytic converter to compare the efficiency of oxygen levels in the exhaust gas. All the models have four heated oxygen sensors, namely, cylinder bank sensors located on the exhaust pipe assembly and under the vehicle, each containing an upstream and downstream sensor. These sensors are heated to shorten the warm-up time the PCM actuates the heater circuit to provide correct voltage signal once the sensors are at operating temperature. Whenever it is being serviced, care must be taken since the sensors have permanently attached pigtails and electrical connectors that are very much vulnerable to damage, contamination, and mishandling. As for procedures of working with sensors, it is desirable to warm the engine when replacing the sensor because it makes it easy to remove, and the procedure includes the next steps: disconnect the electrical connector, unscrew the sensor with the help of a suitable sockets, apply anti-seize compound if the old sensor is used again, and check the tightness of the screws.