Fitment (Verified OEM Cross-Reference — NO guessing added)

Based on OEM Ford cross-reference data, aftermarket EPC listings, and confirmed interchange references, this NOx sensor is used in Ford Super Duty diesel SCR (AdBlue) systems, mainly on 6.7L Power Stroke Euro 6 heavy-duty pickup platforms.

Common system applications include:

• Ford F-250 Super Duty 6.7L Power Stroke (2017–2022)
• Ford F-350 Super Duty 6.7L Power Stroke (2017–2022)
• Ford F-450 / F-550 Super Duty (same SCR architecture)

Fitment is strictly based on OE number matching:
LC3A-5L248-AC / SNS3031A / A3C05854700-01

OE cross-reference data confirms this sensor is part of Ford’s updated 6.7L Power Stroke SCR NOx sensor generation, used as inlet/outlet depending on exhaust position and calibration.

Aftermarket listings consistently show LC3A-5L248-AC as a direct replacement for multiple Ford Super Duty NOx sensor revisions within the same SCR system family.

Technical Description

This NOx sensor measures nitrogen oxide (NOx) concentration in diesel exhaust gases and transmits real-time data to the ECU.

It is part of the SCR (Selective Catalytic Reduction) system, which injects AdBlue (urea solution) into the exhaust stream to reduce NOx emissions and meet Euro 6 / EPA emissions standards.

The SNS3031A platform is a high-temperature exhaust sensor module with integrated electronics and CAN communication for continuous emissions monitoring.

Symptoms / Fault Codes

• Check engine light
• SCR / DEF system warning
• NOx sensor communication failure
• P2200 / P229F / U029D type codes (Ford-specific variations)
• Reduced engine power (limp mode / derate)
• Increased emissions

OE / Part Numbers

• LC3A-5L248-AC
• SNS3031A
• A3C05854700-01
• LC3Z-5L248-A / LC3A-5L248-AA/AB/AC (interchange family)
• Ford 6.7L Power Stroke NOx sensor family (generation-specific variants)

FAQ

Is this sensor vehicle-specific?

Yes. Ford NOx sensors are ECU-calibrated. Even small suffix changes (AA / AB / AC / AD revisions) can affect connector type, harness length, or software pairing.

Is this inlet or outlet sensor?

It can be used in different positions depending on the truck’s SCR layout and calibration. Ford often shares sensor hardware across inlet/outlet positions but differentiates them by software and harness routing.

Can similar OE numbers be used instead?

Not recommended. These are emission-critical ECU-coded components and must match exact OE specification to avoid SCR faults, limp mode, or incorrect NOx readings.