WJIECO 24001920 NOx Sensor Durable. Cross references SNS772, 55502673. 12V downstream lower NOx Sensor for GM 2.8L LWN Duramax Diesel 2016–2019. Fits Colorado, Canyon, Express 3500, Savana 3500, plug & play install.

24001920 NOx Sensor Overview

The 24001920 NOx Sensor manufactured by WJIECO is the downstream lower NOx sensor for GM 2.8L LWN Duramax turbo diesel Chevrolet Colorado, GMC Canyon, Express 3500 and Savana 3500 from 2016 to 2019. This post-cat NOx sensor measures NOx levels leaving the SCR, so the ECM can confirm the SCR system is working properly and stay compliant with EPA emissions rules.

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A faulty downstream NOx sensor commonly triggers SCR efficiency codes, check engine light and engine derate. Common related DTCs include P20EE, P2201, P220A. Many Colorado and Canyon diesel owners experience intermittent faults under highway cruising and towing loads, which are typical signs of degraded NOx sensing element. This sensor cross-references interchange numbers: 24001920, 55502673, SNS772 for fast lookup by repair shops and diesel technicians across the USA.

H2: OEM-Grade Construction & Strict Factory Testing

Our 24001920 NOx Sensor adopts a high-stability ceramic sensing chip, heavy-duty heat-resistant stainless steel probe housing and fully sealed wiring assembly with OEM matching connector. It is built to withstand sustained exhaust heat, engine vibration, rapid thermal cycling, soot buildup, plus road salt, mud and moisture during off-road and highway driving. Low-cost generic NOx sensors commonly skip long-duration high-temperature burn-in calibration, which leads to unstable readings and premature failure after short service time.

Every finished 24001920 NOx Sensor passes a full series of factory quality validation steps: precision NOx signal calibration, high-temperature aging cycle test, waterproof seal pressure test and connector pin continuity inspection before packing. This strict QC process guarantees stable NOx readings, reliable CAN communication with the ECM and extended service life inside the harsh diesel exhaust aftertreatment environment.

H2: Vehicle Fitment (Amazon US GM LWN Duramax Fitment List)

Compatible Engine: GM 2.8L LWN Duramax L4 Turbo Diesel (2016–2019)

• Chevrolet Colorado (2016–2019)
• Chevrolet Express 3500 (2018–2019)
• GMC Canyon (2016–2019)
• GMC Savana 3500 (2017–2019)

Important note: This is the 12V DOWNSTREAM LOWER NOx Sensor. NOT compatible with upstream upper NOx sensor 24000395 / 55500841, NOT compatible with 6.6L Duramax, NOT compatible with Ford Powerstroke, Ram Cummins trucks. Verify your VIN, engine, connector shape and original OEM part number before placing your order. Installing the wrong NOx Sensor will result in persistent SCR faults and derate that cannot be cleared easily.

H2: Core Benefits of 24001920 NOx Sensor

Replacing your faulty downstream lower NOx Sensor with the WJIECO 24001920 NOx Sensor restores accurate post-SCR NOx monitoring for the emissions control system. Reliable downstream NOx readings let the ECM verify SCR conversion efficiency, clear NOx and SCR related diagnostic trouble codes, remove engine power derate restrictions, and complete emissions readiness monitors required for state inspection. For Colorado, Canyon, Express and Savana diesel owners who tow and off-road, proactive replacement prevents unexpected derate and roadside breakdowns.

Robust, factory-calibrated construction greatly reduces early failure and intermittent fault codes that plague low-cost alternatives. This aftermarket NOx Sensor delivers OEM-matching performance at a much lower price than dealership replacement parts, making it a reliable choice for US Colorado / Canyon / Express / Savana diesel owners and professional diesel repair facilities.

H2: Plug-and-Play Installation, No Dealer Programming Required

This 24001920 NOx Sensor is a true direct-fit replacement for the factory downstream lower NOx Sensor on GM 2.8L LWN Duramax 2016–2019. Thread size, probe length, mounting thread, connector profile and wiring pinout all match OEM specifications exactly. Remove the old faulty sensor, torque the new sensor to factory torque specs and reconnect the stock wiring harness. There is no wire cutting, harness modification or ECU flash programming needed. After installation, clear all associated diagnostic trouble codes with a diesel scan tool and perform a loaded test drive. A full drive cycle is recommended so the ECM can run its SCR self-test and reset emissions readiness status.

Every WJIECO 24001920 NOx Sensor is fully bench tested before shipment. If you need a reliable 12V downstream lower NOx Sensor compatible with 24001920 SNS772 for GM 2.8L LWN Duramax, this WJIECO NOx Sensor will return your SCR emissions system to normal operation.

Product Tags

24001920, 55502673, SNS772, NOx Sensor, Nitrogen Oxide Sensor, downstream lower NOx sensor, GM 2.8L LWN Duramax NOx sensor, Colorado diesel NOx sensor, Canyon diesel NOx sensor, Express Savana diesel NOx sensor, diesel exhaust sensor, WJIECO exhaust sensor

https://wjieco-autoparts.com/product/24000395-nox-sensor/

WJIECO 24000395 NOx Sensor Long-lasting. Cross references 55495040, 55496922. 12V upstream upper NOx Sensor for GM 2.8L LWN Duramax Diesel 2016–2019. Fits Chevrolet Colorado, GMC Canyon, plug & play install.