How to replace the Heated Oxygen Sensor - Bank 2 Sensor 1 on Cadillac DTS?

In order to replace the heated Oxygen Sensor - bank 2 sensor 1, handle the oxygen sensors with care not to cause damage, so keep the electrical connector and exhaust inlet end free from any contaminant while avoiding the use of cleaning solvents. To ease the removal process, remove the heated oxygen sensors (HO2S) when the engine temperature is over 48°c (120°F). First, you need to remove the air deflector, subsequently disassemble the connector position assurance (CPA) retainer. Remove the engine harness electrical connector from the heated Oxygen Sensor (HO2S), remove the ho2s clip from the engine bracket, and take out the ho2s. During reusing of the old ho2s, coat the threads with an anti-seize compound, gm p/n 12377953 or equivalent, before installation. Need to tighten the sensor to 41 nm (30 lb ft), reconnect the engine harness electrical connector to the ho2s, installing the cpa retainer and, at last, the ho2s clip to the engine bracket. Finally, reinstall the air deflector.

OEM Cadillac DTS Oxygen Sensor

Oxygen O2 Sensor

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Cadillac DTS Oxygen Sensor Part Number: 12597990
$52.78 MSRP: $107.22
You Save: $54.44 (51%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 1); Front Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2011 Cadillac DTS | Base, Livery, Luxury, Platinum, Premium | 8 Cyl 4.6 L GAS
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Cadillac DTS Oxygen Sensor Part Number: 12597989
$77.33 MSRP: $157.06
You Save: $79.73 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Position 2); Rear Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2011 Cadillac DTS | Base, Livery, Luxury, Platinum, Premium | 8 Cyl 4.6 L GAS

Cadillac DTS Oxygen Sensor

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The Oxygen Sensor is a significant component in Cadillac DTS cars as it helps in analysing the air/fuel combination based on the y presence of unburned oxygen in the exhausts. Depending on the oxygen concentration the voltage signal is produced, and the engine control computer adjusts the mixture for the premier performance with the lowest emissions. Self-diagnostic by memorizing steady-state rich and lean reference values and firing the sensor's zirconium dioxide sensing element coated in platinum at high temperatures, the sensor periodically cycles to sustain the catalytic converter effectiveness. Most Cadillac DTS automobiles contain more than one oxygen sensor; however, the most important one relays information to the computer as the upstream sensor. The oxygen sensor may degrade over time and this may result into enhanced emission of fuel and low efficiency and hence a need to be serviced or checked at times.

Cadillac DTS Oxygen Sensor Parts and Q&A

Oxygen Sensor
12597990
Q: How to replace the Heated Oxygen Sensor - Bank 2 Sensor 1 on Cadillac DTS?
A:
In order to replace the heated Oxygen Sensor - bank 2 sensor 1, handle the oxygen sensors with care not to cause damage, so keep the electrical connector and exhaust inlet end free from any contaminant while avoiding the use of cleaning solvents. To ease the removal process, remove the heated oxygen sensors (HO2S) when the engine temperature is over 48°c (120°F). First, you need to remove the air deflector, subsequently disassemble the connector position assurance (CPA) retainer. Remove the engine harness electrical connector from the heated Oxygen Sensor (HO2S), remove the ho2s clip from the engine bracket, and take out the ho2s. During reusing of the old ho2s, coat the threads with an anti-seize compound, gm p/n 12377953 or equivalent, before installation. Need to tighten the sensor to 41 nm (30 lb ft), reconnect the engine harness electrical connector to the ho2s, installing the cpa retainer and, at last, the ho2s clip to the engine bracket. Finally, reinstall the air deflector.