1. Volvo XC60(2018+) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:32253666(T4/T5 Engine，2018 +)
OE NO.:Bosch 17028(compatible with Denso 234-9137)
Note: Wideband design, need to match P5/P6 platform engine.
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480393(2018 +)
OE NO.:Denso 234-4932(compatible with Bosch 17029)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0130:Front Oxygen Sensor Circuit Malfunction
Cause:Worn wiring harness (common near exhaust manifold), sensor poisoning (silicon/phosphorus contamination).
Repair Suggestions:Check the insulation of the wiring harness, use a borescope to check the color of the sensor probe (normal light gray, black for carbon deposits, white for silicon poisoning).
P0135:Front Oxygen Sensor Heating Failure
Cause:Heater wire blown (60%), fuse blown (F215/30A).
Maintenance advice: use a multimeter to measure the resistance of the heating wire (normal 3-5Ω), cold car can be directly replaced sensor.
P0150:Rear Oxygen Sensor Circuit Malfunction
Cause:Excessive installation torque (recommended 25-30N・m), carbon buildup on probe.
Repair advice: Disassemble the sensor and check the threads for deformation, use a special carbon cleaner (e.g. CRC 05103).
How to remove and how to clean？
Remove Tool:22mm Oxygen Sensor Sleeve (with side opening), WD-40 Penetrant, Ferric Chloride Solution (5% concentration).
Remove Steps.
Disconnect the negative battery terminal and lift the vehicle to a safe height.
Remove the exhaust manifold heat shield and locate the front oxygen sensor (in front of the three-way catalyzer).
Spray WD-40 and let sit for 15 minutes, unscrew sensor counterclockwise (if stuck, use propane torch to heat).
Cleaning: Soak the sensor in ferric chloride solution for 30 minutes, clean the probe with a soft brush, no water washing.
Apply anti-seize lubricant (e.g. Loctite 5050) during installation and torque to 30N・m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$280-$350，generic $180-$250；Original rear O2 Sensor$220-$300，generic $120-$180。
Labor hours:$150-$220(the heat shield needs to be removed for pre-oxygen, the labor hours are higher).

2. Volvo XC90(2015+) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:32253666(Common to XC60)
OE NO.:Denso 234-9160(compatible with Bosch 17028)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480395(2015 +)
OE NO.:Bosch 17029(compatible with Denso 234-4941)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0131:Low signal voltage of front oxygen sensor
Cause:Probe aging (over 100,000km), electrolyte leakage.
Maintenance advice: use an oscilloscope to detect the signal waveform (normal 0.1-0.9V wave), aging need to be directly replaced.
P0420:Low efficiency of catalytic converter (related to after-oxygen).
Cause:Sensor false alarm (40%), clogged catalytic converter.
Repair suggestion: Replace the rear oxygen sensor first, if the problem persists, check the catalytic converter back pressure (normal < 1.2bar).
How to remove and how to clean？
Remove Tool:3/8-inch drive sleeve, insulated gloves.
Remove Steps.
Remove the lower engine shield and locate the rear oxygen sensor (behind the catalytic converter).
Disconnect the harness plug and use a socket to unscrew the sensor (pay attention to high temperature residue).
Cleaning:Wipe the probe with alcohol to avoid damaging the ceramic element.
Avoid over-tightening (25N・m) during installation to prevent thread slippage.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$320-$400，generic $200-$280；Original rear O2 Sensor$250-$330，generic $150-$220。
Hours:$180-$250 (deeper rear oxygen position, need to lift vehicle).

3. Volvo XC40(2018+) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:32253666(common to XC60)
OE NO.:Denso 234-9137(compatible with Bosch 17028)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480393(common to XC60)
OE NO.:Bosch 17029(compatible with Denso 234-4932)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0134:No change in front oxygen sensor signal
Cause:Sensor internal disconnection (easy to happen during cold start), ECU malfunction.
Repair suggestion: Use diagnostic instrument to read the real-time data flow (normal change frequency > 1 time / sec), abnormalities need to replace the sensor.
P0171:Excessively lean mixture (associated with pre-oxygen)
Cause:Air leakage from intake manifold, insufficient fuel pump pressure.
Repair Suggestion:Use a smoke tester to check the air intake system sealing, measure the fuel pressure (normal 50-55psi).
How to remove and how to clean？
Remove Tool:T30 Plummer wrench, torque wrench.
Remove Steps.
Remove the right front wheel arch liner and locate the front oxygen sensor (behind the turbocharger).
Disconnect the wiring harness and unscrew the sensor using a T30 wrench (note where the heat shield is mounted).
Cleaning:Blow the probe with compressed air and avoid contact with sharp objects.
Apply anti-seize agent during installation and tighten to 30N・m torque.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$260-$330，generic $160-$230；Original rear O2 Sensor$200-$270，generic $100-$170。
Hourly:$120-$180(Easier to access the front oxygen position).

4. Volvo S90(2017+) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:32253666(common to XC60)
OE NO.:Bosch 17028(compatible with Denso 234-9160)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480395(common to XC90)
OE NO.:Denso 234-4941(compatible with Bosch 17029)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0135:Front Oxygen Sensor Heating Malfunction
Cause:Faulty heating relay (J285 module), false connection in wiring harness.
Maintenance recommendations: check the relay power supply (12V), using a multimeter to measure the resistance of the heating wire (normal 3-5Ω).
P0155:Rear Oxygen Sensor Heating Malfunction
Cause:Blown fuse (F216/20A), damaged heating wire inside sensor.
Repair advice: Replace the fuse and if it blows again, check if the wiring harness is short-circuited.
How to remove and how to clean？
Remove Tool:17mm Open end wrench, socket extension.
Remove Steps.
Remove the engine heat shield and locate the front oxygen sensor (left side of exhaust manifold).
Disconnect the wiring harness and unscrew the sensor with a 17mm wrench (watch out for high temperature residue).
Cleaning: Soak for 10 minutes in special oxygen sensor cleaner (e.g. Gumout 5100).
Ensure that the harness plug is locked in place and torqued to 30N/m when installing.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$290-$360，generic $180-$250；Original rear O2 Sensor$230-$300，generic $130-$200。
Hours:$150-$220(heat shield needs to be removed for preoxygen).

5. Volvo S60(2019+) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:32253666(common to XC60)
OE NO.:Denso 234-9137(compatible with Bosch 17028)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480393(common to XC60)
OE NO.:Bosch 17029(compatible with Denso 234-4932)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0137:Rear oxygen sensor signal voltage is low
Cause:Sensor probe contamination (oil/coolant leak), broken wiring harness.
Repair suggestion: Check the sealing of PCV system and troubleshoot upstream problems before replacing the rear oxygen sensor.
P0172:Excessive mixture (associated with pre-oxygen)
Cause:Injector leakage, malfunction of air flow meter.
Repair suggestion: Use fuel pressure gauge to measure idle pressure (normal 50psi), check air flow meter signal.
How to remove and how to clean？
Remove Tool:22mm Oxygen sensor socket, ratchet.
Remove Steps.
Lift the vehicle and remove the exhaust mid-pipe guard.
Locate the rear oxygen sensor (behind the catalytic converter) and disconnect the wiring harness.
Cleaning: Use an ultrasonic cleaner (temperature 50°C, time 15 minutes), do not use acidic cleaners.
Install with a new gasket, torque 25N・m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$270-$340，generic $170-$240；Original rear O2 Sensor$210-$280，generic $110-$180。
Hours: $140-$200 (rear oxygen position is easier to access).

6. Volvo V90 Cross Country(2017+) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:32253666(common to XC60)
OE NO.:Bosch 17028(compatible with Denso 234-9160)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480395(common to XC90)
OE NO.:Denso 234-4941(compatible with Bosch 17029)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0138:High signal voltage of rear oxygen sensor
Cause:Sensor aging (over 80,000km), ECU failure.
Maintenance suggestions: use diagnostic equipment to read the rear oxygen voltage (normal 0.45V or so), abnormalities need to replace the sensor.
P0430:Low efficiency of catalytic converter(Bank 2)
Cause:Rear oxygen sensor false alarm, clogged catalytic converter.
Repair suggestion:Replace the rear oxygen sensor first, if the problem persists, check the temperature difference of the catalytic converter (normal > 100℃).
How to remove and how to clean？
Remove Tool:3/8 Inch drive sleeve, universal joint.
Remove Steps.
Remove the chassis shield and locate the rear oxygen sensor (in front of the exhaust muffler).
Disconnect the wiring harness and unscrew the sensor with a socket (pay attention to the heat shield mounting direction).
Cleaning:Wipe the probe with alcohol cotton, avoid using metal tools.
Make sure that there is no interference with the wiring harness when installing, torque 30N・m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$300-$370，generic $190-$260；Original rear O2 Sensor$240-$310，generic $140-$210。
Hourly:$160-$230(Post-oxygen position is deeper).

7. Volvo V60 Cross Country(2017+) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:32253666(common to XC60)
OE NO.:Denso 234-9137(compatible with Bosch 17028)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480393(common to XC60)
OE NO.:Bosch 17029(compatible with Denso 234-4932)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0133:Slow response of front oxygen sensor
Cause:Sensor poisoning (silicon/phosphorus contamination), carbon buildup on probe.
Repair advice: Check for coolant leaks (silicon contamination is common in damaged cylinder gaskets) and replace the sensor if necessary.
P0156:Abnormal signal fluctuation of rear oxygen sensor
Cause:Poor wiring harness contact (oxidized plug), internal sensor malfunction.
Repair Suggestion: Clean the wiring harness plug and apply conductive paste (e.g. Sta-Lube).
How to remove and how to clean？
Remove Tool:22mm Oxygen sensor socket, torque wrench.
Remove Steps.
Lift the vehicle and remove the exhaust lugs.
Locate the front oxygen sensor (behind the turbocharger) and disconnect the wiring harness.
Cleaning:Spray the probe with a special carbon cleaner (e.g. BG 109) and let it dry naturally.
Installation with new anti-seize agent, torque 30N・m.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$280-$350，generic $180-$250；Original rear O2 Sensor$220-$300，generic $120-$180。
Hours:$150-$220(heat shield needs to be removed for preoxygen).

8. Volvo S80(2010-2016) O2 sensor

Original part numbers and OE NO.
Upstream(Front) Oxygen Sensor part No.:(Bank 1 Sensor 1)
Original part numbers:30681335(B6304 engine)
OE NO.:Bosch 15055(compatible with Denso 234-4487)
Downstream(Rear) Oxygen Sensor part No.:(Bank 1 Sensor 2)
Original part numbers:31480395(common to XC90)
OE NO.:Denso 234-4941(compatible with Bosch 17029)
​​​
Defender Oxygen Sensor Fault Codes&Symptom Signs
P0130:Front Oxygen Sensor Circuit Malfunction
Cause:Deteriorated wiring harness (common in high temperature areas of the engine compartment), damaged sensor.
Maintenance recommendations: check the harness insulation, use a multimeter to measure the sensor resistance (normal 3-5Ω).
P0150:Rear Oxygen Sensor Circuit Malfunction
Cause:Loose sensor mounting (tighten to 25N・m torque), contaminated probe.
Repair suggestion: Disassemble the sensor to check whether the threads are slippery, clean the probe.
How to remove and how to clean？
Remove Tool:17mm Open end wrench, socket extension.
Remove Steps.
Remove the engine heat shield and locate the front oxygen sensor (right side of exhaust manifold).
Disconnect the harness and unscrew the sensor with a 17mm wrench (watch out for high temperature residue).
Cleaning: Soak in ferric chloride solution for 30 minutes and clean the probe with a soft brush.
Apply anti-seize agent and torque to 30N・m when installing.
How much oxygen sensor cost to replace？
Auto Parts:Original Front O2 Sensor$240-$310，generic $150-$220；Original rear O2 Sensor$200-$270，generic $100-$170。
Hourly:$120-$180(Easier to access the front oxygen position).
General Maintenance Recommendations
Diagnostic Remove Tool:It is recommended to use Volvo VIDA DICE to read the real-time data stream, focusing on the frequency of oxygen sensor voltage changes (normal > 1 time/sec).
Risk of cleaning:Cleaning of the oxygen sensor is not officially recommended as it may cause the ceramic element to break.If cleaning is necessary, only use ferric chloride solution, no water washing is allowed.
Choice of parts: Give priority to OE brands (e.g. Denso, Bosch), as sub-factory parts may cause false alarms from the ECU.
Work Time Optimization:Front Oxygen Sensor replacement usually requires removal of the heat shield or turbocharger, and it is recommended that the peripheral wiring harnesses and vacuum hoses be inspected at the same time.
Through the above in-depth analysis, you can quickly locate the oxygen sensor problem in each model and develop a solution in combination with cost and repair efficiency.If you need to further refine the repair process for a certain model, you can provide specific VIN codes for targeted analysis.
Data Supplement
This document is based on global automotive databases and repair manual data, covering technical parameters and repair standards for all target models.It is recommended to check the VIN number of the vehicle before servicing to ensure that the parts are suitable.
Part Number Fitment:Some part numbers may be slightly adjusted due to the 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)
Provide for Volvo XC60/XC90/XC40/S90/S60/V90 Cross Country/XC40 Recharge/V60 Cross Country/S80 good price O2 sensor OEM repair carparts and auto replacement accessories oxygen sensor