How to replace the Heated Oxygen Sensor (HO2S) for Bank 1 Sensor 2 on Cadillac DTS?

In order to replace the Heated Oxygen Sensor (HO2S) for Bank 1 Sensor 2, treat the oxygen sensors with care to avoid loss of function, making sure not to leave the electrical connector and exhaust inlet uncontaminated with any solvents and do not drop the sensor. Use a cool engine to help remove heated oxygen sensors more easily. Remove heated oxygen sensors with the use of the engine when the temperature is above 48°C (120°F). Dismantle the oxygen sensor wiring harness heat shield first. Pull the engine harness electrical connector off the HO2S and then remove the sensor. When installing, the use of a special anti-seize compound on the HO2S threads, consisting of liquid graphite and glass beads (not to be confused with tape); New or service replacement sensors have this compound pre-applied on them. If reusing the old HO2S use anti-seize, GM P/N 12377953 or equivalent on threads. Install the HO2S and tighten it with the torque of 41 Nm (30 lb ft). Connect the engine harness electrical connector to the HO2S and restore the oxygen sensor wiring harness heat shield.

OEM Cadillac DTS 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).

2 Oxygen Sensors found

View related parts
Cadillac DTS Oxygen Sensor Part Number: 12597990
$52.78 MSRP: $107.22
You Save: $54.44 (51%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
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

Want to cut long-term maintenance and repair costs? Choose OEM Oxygen Sensor. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine Cadillac DTS parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM Cadillac DTS Oxygen Sensor includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

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 Questions & Experts Answers

Oxygen Sensor
12597989
Q: How to replace the Heated Oxygen Sensor (HO2S) for Bank 1 Sensor 2 on Cadillac DTS?
A:
In order to replace the Heated Oxygen Sensor (HO2S) for Bank 1 Sensor 2, treat the oxygen sensors with care to avoid loss of function, making sure not to leave the electrical connector and exhaust inlet uncontaminated with any solvents and do not drop the sensor. Use a cool engine to help remove heated oxygen sensors more easily. Remove heated oxygen sensors with the use of the engine when the temperature is above 48°C (120°F). Dismantle the oxygen sensor wiring harness heat shield first. Pull the engine harness electrical connector off the HO2S and then remove the sensor. When installing, the use of a special anti-seize compound on the HO2S threads, consisting of liquid graphite and glass beads (not to be confused with tape); New or service replacement sensors have this compound pre-applied on them. If reusing the old HO2S use anti-seize, GM P/N 12377953 or equivalent on threads. Install the HO2S and tighten it with the torque of 41 Nm (30 lb ft). Connect the engine harness electrical connector to the HO2S and restore the oxygen sensor wiring harness heat shield.