LINCOLN Nautilus(2019-2025) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:L3Z-9G444-AA(2.0T/2.7T engine)
OE NO.:Bosch 17028(compatible with Denso 234-9003)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:L3Z-9G444-AB
OE NO.:Bosch 17029(compatible with Denso 234-9004)
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Defender Oxygen Sensor Fault Codes&Symptom Signs
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Defender Oxygen Sensor Fault Codes&Symptom Signs
P0130 Low voltage to front oxygen sensor circuit (worn harness or poisoned sensor) Check harness connector, clean or replace sensor
P1131 Front oxygen sensor heating fault (blown fuse or damaged heating element) Check fuse, replace sensor
P0150 Rear oxygen sensor circuit malfunction (loose mounting or contamination) Tighten sensor, clean probe
How to remove and how to clean？
Remove Tool:22mm Oxygen sensor sleeve (side opening design), WD-40, ferric chloride solution.
Remove Steps:
Disconnect the negative battery terminal and lift the vehicle.
Remove the exhaust manifold heat shield and locate the front oxygen sensor (in front of the three-way catalytic converter).
Spray WD-40 to loosen threads and unscrew sensor counterclockwise.
O2 Sensor clean:Soak the carbon with 5-10% ferric chloride solution and clean the probe with a soft brush (no water washing).
When installing a new sensor, apply anti-seize lubricant and tighten to a torque of 30-40 N-m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$180-$250，generic $120-$180；Original rear O2 Sensor$150-$220，generic $90-$150。
labor:$$120-$200(Pre-oxygen requires removal of heat shield and higher labor hours).

LINCOLN Corsair(2020-2025) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:DD5Z-9G444-BA(2.0T engine)
OE NO.:Bosch 17028(compatible with Denso 234-9003)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:DD5Z-9G444-CA
OE NO.:Bosch 17029(compatible with Denso 234-9004)
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Defender Oxygen Sensor Fault Codes&Symptom Signs
P0135 Front oxygen sensor heating circuit malfunction (heater wire burned out) Replace sensor
P1157 Rear oxygen sensor not converting (mixture too lean) Check air intake system sealing
P0171 Fuel system too lean (abnormal sensor signal) Clean or replace sensor
How to remove and how to clean？
Remove Tool:22mm Sockets, wrenches, carburetor cleaner.
Remove Steps.
Disconnect the battery and remove the exhaust pipe retaining bolt.
Locate the rear oxygen sensor (behind the three-way catalytic converter), spray loosener and unscrew.
O2 Sensor clean:Soak the probe with carburetor cleaner to avoid damaging the ceramic body.
Make sure the harness is not twisted when installing, torque 30-40 N-m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$190-$260，generic $130-$190；Original rear O2 Sensor$160-$230，generic $100-$160。
labor:$$100-$180(Post-oxygen position is easier to maneuver).

LINCOLN Aviator(2020-2025) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:L3Z-9G444-AD(3.0T engine)
OE NO.:Bosch 17028(compatible with Denso 234-9003)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:L3Z-9G444-AE
OE NO.:Bosch 17029(compatible with Denso 234-9004)
​​​Defender Oxygen Sensor Fault Codes&Symptom Signs
P0137 Front oxygen sensor voltage too low (sensor deterioration) Replace sensor
P1130 Fuel trimming limit reached (sensor signal abnormal) Check fuel pressure and injectors
P0155 Rear oxygen sensor heating malfunction (control module malfunction) Check wiring harness and control module
How to remove and how to clean？
Remove Tool:22mm Sleeve, Borescope, Specialized Removal Tool.
Remove Steps.
Lift the vehicle and remove the chassis shield.
Locate the front oxygen sensor (near the engine) and unscrew it using a special tool.
O2 Sensor clean:Use ultrasonic cleaner to remove carbon buildup, avoid physical scraping.
Apply anti-seize adhesive when installing, torque 35-45 N-m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$200-$280，generic $140-$200；Original rear O2 Sensor$170-$240，generic $110-$170。
labor:$$150-$220(Complexity of preoxygenation position).

LINCOLN Navigator(2021-2025) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:L3Z-9G444-AF(3.5T engine)
OE NO.:Bosch 17028(compatible with Denso 234-9003)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:L3Z-9G444-AG
OE NO.:Bosch 17029(compatible with Denso 234-9004)
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0141 Rear oxygen sensor heating malfunction (heating circuit disconnected) Replace sensor
P1158 Excessive mixture (sensor poisoning) Check fuel system and sensor
P0172 Fuel system too rich (abnormal sensor signal) Clean or replace sensor
How to remove and how to clean？
Remove Tool:22mm Socket, universal joint wrench, special removal bracket.
Remove Steps.
Remove the exhaust manifold heat shield and locate the rear oxygen sensor (behind the three-way catalyzer).
Use a gimbal wrench to loosen the sensor to avoid damage to the wiring harness.
O2 Sensor clean: Soak in 10% hydrochloric acid solution (metal probes only), rinse with water and dry.
Make sure that the sensor threads are not damaged when installing, torque 40-50 N-m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$210-$290，generic $150-$210；Original rear O2 Sensor$180-$250，generic $120-$180。
labor:$$180-$250(Post-oxygen location concealed).

LINCOLN Z(2023-2025) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:L3Z-9G444-AH(2.0T engine)
OE NO.:Bosch 17028(compatible with Denso 234-9003)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:L3Z-9G444-AI
OE NO.:Bosch 17029(compatible with Denso 234-9004)
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0132 Front oxygen sensor voltage too high (signal interference) Check harness shielding
P1135 Slow sensor response (carbon blockage) Clean or replace sensor
P0156 Rear oxygen sensor signal abnormal (damaged sensor) Replace sensor
How to remove and how to clean？
Remove Tool:22mm Sockets, flex wrenches, specialized removal kits.
Remove Steps.
Lift the vehicle and remove the middle section of the exhaust pipe.
Locate the rear oxygen sensor (near the muffler) and unscrew it using a flexible wrench.
O2 Sensor clean:Soak in special oxygen sensor cleaner (e.g. CRC 05103) and wipe with a soft cloth.
Avoid over-tightening during installation, torque 30-40 N-m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$190-$270，generic $130-$190；Original rear O2 Sensor$160-$230，generic $100-$160。
labor:$$120-$200(Post-oxygen position is easier to maneuver).
General Precautions
Troubleshooting: Use the OBD-II scanner to read specific fault codes, prioritize checking the wiring harness connector and sensor power supply.
Cleaning Limitations: Only ceramic probes can be cleaned, metal probes need to be replaced.
Installation specifications: Avoid the use of silicone-containing sealants to prevent poisoning of the sensor; torque needs to be implemented strictly according to specifications.
Data Supplement
For more detailed repair manuals or year-specific data, it is recommended that they be obtained through a Lincoln dealer or specialized repair platform.
Part number fitment: Some part numbers may be slightly adjusted due to differences in engines model and year, it is recommended to check the specific fitment information through the VIN code.
Fault Code Diagnosis:Oxygen sensor failure may be related to the ECU software version, it is recommended to use a special diagnostic instrument for parameter calibration.
(Note: The above prices may fluctuate ±15% due to regional channel differences, real-time data suggest checking local dealers)
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