O2 Oxygen Sensor Upstream Downstream for Chrysler Town and Country (2004-2010) 3.3L 3.8L

Direct-Fit Upstream & Downstream O2 Sensor Kit for 2004-2010 Chrysler Town & Country (RS/RT)

What it Does: This matched upstream and downstream oxygen sensor kit monitors exhaust oxygen levels on 2004-2010 Chrysler Town & Country RS/RT minivans equipped with 3.3L EGA and 3.8L EGH engines for closed-loop fuel control.

The Stock Chrysler Town & Country Sensor Failure

Factory narrowband sensors on the RS/RT platform with 3.3L EGA and 3.8L EGH engines suffer internal heater circuit burnout and zirconia element contamination over high-mileage thermal cycling. Exhaust moisture, oil vapor fouling, and carbon soot coat the ceramic thimble, slowing voltage switching between 0.1V and 0.9V. When signal response lags, the PCM locks open-loop enrichment and sets P0135, P0141, or P0420 fault codes.

Common Symptoms of a Failing OEM Oxygen Sensor

• DTCs & Check Engine Light: Triggers P0131, P0135, P0141, or P0420 from slow voltage switching or open heater circuits.
• Rich Fuel Trim: Sluggish feedback drives positive fuel trims, causing tailpipe soot buildup and premature catalytic converter loading.
• Drivability Loss: Produces rough cold idle, poor fuel economy, and failed OBD-II emissions readiness monitors.

The Direct-Fit Heated Zirconia Solution

This matched 2-piece sensor kit restores PCM signal precision using high-temperature zirconia ceramic elements shielded by stainless steel protective louvers. Laser-welded housings resist exhaust vibration and moisture ingress, while internal heating coils rapidly reach 600°F operating temperature for fast closed-loop transition. Factory-style weatherpack connectors install directly into OEM exhaust bungs without wire splicing, replacing OEM numbers 234-4029, 234-4030, and 234-4217.

What's Included

• 1 Upstream Oxygen Sensor
• 1 Downstream Oxygen Sensor

Technical Specifications

Compatibility

• 2004-2010 Chrysler Town & Country 3.3L
• 2004-2010 Chrysler Town & Country 3.8L

Frequently Asked Questions & Fitment Warnings

Does this fit the RS/RT Town & Country?

Yes. Fits 2004-2010 Chrysler Town & Country RS/RT models with 3.3L EGA and 3.8L EGH engines. Excludes 4.0L V6 models; confirm engine before ordering.

Will this clear P0135, P0141, or P0420 codes?

Yes, for sensor faults. Replacing failed sensors resolves heater circuit codes (P0135, P0141) and false P0420 triggers unless the catalytic converter substrate is damaged.

Are connectors ready for direct installation?

Yes. Both sensors include factory plug-and-play harnesses; chase exhaust bung threads before torquing to spec.

The Chrysler Precision Standard

Engineered for daily-driver durability and emissions compliance, this matched sensor set keeps RS/RT minivans running CEL-free while protecting downstream catalytic hardware.