02Sensor Replacement

Chrysler O2 Sensor

Showing all 2 results

Original part numbers and OE numbers
Chrysler 300 O2 sensor
Upstream(Front) Oxygen Sensor part No.:05180347AA (fits 3.6L V6 engine, GM 2011-2023 models)
Downstream(Rear) Oxygen Sensor part no:05180348AB (Common with Dodge Charger/Challenger)
Chrysler Pacifica (Town & Country) O2 sensor
Upstream(Front) Oxygen Sensor part No.: 68248739AA (3.6L Pentastar engine, 2017-2025 models)
Downstream(Rear) Oxygen Sensor part No.: 68248740AB (compatible with plug-in version)
Chrysler Town & Country (oldmodel) O2 Sensor
Oxygen Sensor Generic Part No.: 56029301AA (Compatible with 2008-2016 3.8L/4.0L engines)
Defender Oxygen Sensor Fault Codes & Symptom Signs
Fault Codes Cause AnalysisService recommendations
P0420 Low catalytic converter efficiency (carbon buildup on rear oxygen sensor or sintered three-way catalytic converter) Clean or replace the rear oxygen sensor, check the exhaust system sealing
P0130/P0134 Oxygen sensor signal abnormality (circuit break, plug oxidation, or sensor poisoning) Check wiring harness connections, clean probe with ferric chloride, replace sensor if necessary.or sensor poisoning) Check wiring harness connection, use ferric chloride to clean probe, replace sensor if necessary
P0171/P0172 Mixture is too thin/thick (dirty MAF sensor or abnormal fuel pressure) Clean MAF sensor, check fuel pump and injectors
P0300 Multi-cylinder misfiring (air-fuel ratio imbalance due to oxygen sensor signal interference) Prioritize checking the ignition system, synchronize and calibrate the oxygen sensor signal.
P2270/P2271 Oxygen sensor signal stickiness (sulfur contamination or heating circuit failure) Replace the fuel with high grade fuel, check the power supply to the heating circuit

What causes & How to repair
Short city commute:
Problem: Carbon buildup due to frequent starts and stops.Sensor response is delayed, triggering P0130/P0171 fault.
Solution: Clean the fuel line with a fuel additive every 30,000 kilometers.
Long-distance highway/towing heavy loads:
Problem: High engine load operation triggers overheating and accelerated aging of sensors (common in Pacifica Plug-In).
Solution: Install heat shields and periodically check the sealing of the exhaust system.
For use in cold areas:
Problem: Low temperatures cause a delay in the heating circuit, triggering the P0030/P0050 fault.
Solution: Replace oxygen sensor with fast heating function.
How much oxygen sensor cost to replace?

Chrysler 300 OEM sensor cost 280-450 Sub-assembly cost 120-250 Labor 100-180
Pacifica/Town & Country OEM sensor cost 300-600 Sub-assembly cost 150-300 Labor 150-250

Repair Suggestions: Prefer original parts (better compatibility), sub-factory parts need to be verified by VIN for fitment; labor cost varies widely; 4S shops are 30%-2% higher than third-party repairs.The cost of labor varies greatly, with 4S stores being 30%-50% higher than third-party repairs.
Data Source and Extension Suggestions
The above information is synthesized from Chrysler Technical Bulletin (TSB 21-NA-013), repair cases and third-party platforms (RepairPal).Real-time parts prices are available through Mopar Parts Now. For in-depth analysis of trouble codes, please refer to Tech2 or GDS2 diagnostic tool data stream.

Provide for Chrysler 300\Pacifica\Town & Country good price O2 sensor OEM repair carparts and auto replacement accessories oxygen sensor