O2 Oxygen Sensor Downstream for Ford Escape Fusion (2011-2012) 2.5L, 3.0L

Direct-Fit Downstream Oxygen Sensor Pair for 2011-2012 Ford Escape & Fusion (CD2/CD3)

What it Does: The Downstream Oxygen Sensor Kit monitors post-catalyst exhaust gas stream efficiency on the 2011-2012 Ford Escape and Fusion to maintain accurate emissions feedback and eliminate false catalyst efficiency diagnostic trouble codes.

The Stock Ford Escape & Fusion Catalyst Monitoring Limitation

Factory oxygen sensors on the CD2 Escape and CD3 Fusion degrade after repeated thermal cycling and prolonged exposure to combustion blow-by and soot. Over time, internal heater element resistance drifts and the porous platinum electrode becomes fouled. This latency compromises downstream feedback, triggering false P0420/P0430 DTCs, causing the PCM to revert to conservative trim maps that increase tailpipe emissions and waste fuel.

The Engineering Solution

Engineered for high-durability exhaust duty, these downstream sensors feature a fast-acting ceramic planar core housed in dual-layer 304 stainless steel protective shrouding. This construction resists thermal shock, oxidation, and particulate buildup. Built with OEM-specification resistance curves, thermal-rated wiring, and factory-matched pin terminals, they restore precise catalytic monitoring to keep the engine management system running in optimal closed-loop operation.

What's Included

• 2x Direct-Fit Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2011-2012 Ford Escape (2.5L I4 Duratec 25, Downstream)
• 2011-2012 Ford Escape (3.0L V6 Duratec 30, Downstream Bank 1 & Bank 2)
• 2011-2012 Ford Fusion (2.5L I4 Duratec 25, Downstream)
• 2011-2012 Ford Fusion (3.0L V6 Duratec 30, Downstream Bank 1 & Bank 2)

Frequently Asked Questions & Fitment Warnings

Does this fit the CD2 and CD3 Escape & Fusion?

Yes, this is a direct fit for the 2011-2012 Ford Escape and Fusion equipped with the Duratec 25 2.5L or Duratec 30 3.0L engine. Confirm your engine displacement and bank position prior to installation.

Do I need to calibrate or tune the PCM after replacing these sensors?

No calibration is required, but clearing stored trouble codes with an OBD-II scanner is recommended to reset the ECU readiness monitors.

The Ford Fleet-Grade Standard

Manufactured to withstand daily stop-and-go driving and severe thermal cycles, these downstream sensors deliver reliable signal accuracy, protecting catalytic convertor hardware and keeping daily emissions diagnostics compliant.