O2 Oxygen Sensor Upstream Downstream for Chrysler PT Cruiser (2004-2010) 2.4L

Direct-Fit Upstream & Downstream O2 Sensor Kit for 2004-2010 Chrysler PT Cruiser (PT)

What it Does: This matched O2 sensor kit monitors upstream and downstream exhaust oxygen on 2004-2010 Chrysler PT Cruiser EDZ / EDV 2.4L models for accurate PCM fuel trims.

The Stock Chrysler PT Cruiser Sensor Failure

Factory oxygen sensors on the PT chassis endure severe thermal cycling and soot buildup from the EDZ / EDV 2.4L engine. Oil ash, silicone, or coolant residue gradually fouls the zirconia ceramic element, slowing switching rates and skewing air-fuel voltage signals. Simultaneously, internal heater coils suffer resistance spikes or open circuits during cold starts, triggering P0135, P0141, and lean fault code P0171. Replacing a single aging sensor often leaves the opposite bank lagging behind.

Common Symptoms of a Failing OEM Oxygen Sensor

• Heater & Circuit DTCs: P0135, P0141, or P0131 low-voltage codes illuminate the CEL.
• Rich Running & Soot: Slow upstream response causes heavy fuel consumption and fouled plugs.
• Failed Emissions: Stalled downstream voltage prevents readiness monitors from clearing P0420 checks.

The Direct-Fit Heated Zirconia O2 Sensor Solution

Installing a matched upstream and downstream pair restores rapid stoichiometric switching before and after the catalyst. Each direct-fit sensor uses a fast-heating zirconia core inside a laser-welded stainless housing that resists thermal shock and moisture intrusion. Factory-length harnesses with OEM weatherproof plugs connect directly to the PT Cruiser sub-harness without splicing. Engineered to replace 234-4274 and 234-4588, this kit restores accurate closed-loop PCM control.

What's Included

• 1 Upstream Oxygen Sensor
• 1 Downstream Oxygen Sensor

Technical Specifications

Compatibility

• 2004-2010 Chrysler PT Cruiser 2.4L Naturally Aspirated (Upstream & Downstream)
• 2004-2010 Chrysler PT Cruiser 2.4L Turbocharged (Upstream & Downstream)

Frequently Asked Questions & Fitment Warnings

Does this fit the PT Cruiser?

Yes. Direct fit for 2004-2010 Chrysler PT Cruiser EDZ / EDV 2.4L models (Naturally Aspirated & Turbocharged). Confirm 2.4L engine before ordering; other Chrysler models are excluded.

Will this clear P0135/P0141 codes?

Yes. Installing 234-4274 and 234-4588 sensors clears heater and response codes once exhaust leaks are fixed and DTCs reset.

Is hardware plug-and-play?

Yes. Pre-wired OEM plugs require no splicing; torque with an O2 socket without fouling the tip.

The Chrysler Precision Standard

Engineered for closed-loop accuracy on the PT chassis, this sensor pair ensures reliable emissions readiness and trouble-free drivability.