WJIECO 12680215 NOx Sensor Dependable. Cross references SNS317A, 12718742, 12680619. 12V upstream position 1 NOx Sensor for GM 6.6L L5P Duramax Diesel 2017–2019. Fits Silverado 2500HD 3500HD, Sierra 2500HD 3500HD, plug & play install.

12680215 NOx Sensor Overview

The 12680215 NOx Sensor manufactured by WJIECO is the upstream position 1 NOx sensor for GM 6.6L L5P Duramax turbo diesel Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD from 2017 to 2019. This inlet NOx sensor reads engine-out NOx before the SCR, allowing the ECM to calculate correct DEF injection volume and keep emissions within EPA standards.

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A faulty upstream NOx sensor commonly triggers DEF dosing codes, check engine light and engine derate. Common related DTCs include P20EE, P2200, P2209. Many L5P Duramax owners experience intermittent faults under heavy towing and highway cruising loads, which are typical signs of degraded NOx sensing element. This sensor cross-references interchange numbers: 12680215, 12718742, 12680619, SNS317A, A2C15386800-01 for fast lookup by repair shops and diesel technicians across the USA.

H2: OEM-Grade Construction & Strict Factory Testing

Our 12680215 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 heavy-duty towing and off-road 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 12680215 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 L5P Duramax Fitment List)

Compatible Engine: GM 6.6L L5P Duramax V8 Turbo Diesel (2017–2019)

• Chevrolet Silverado 2500HD / 3500HD
• GMC Sierra 2500HD / 3500HD

Important note: This is the 12V UPSTREAM POSITION 1 NOx Sensor. NOT compatible with downstream NOx sensor, NOT compatible with older Duramax LML/LB7/LLY/LBZ/LMM, 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 12680215 NOx Sensor

Replacing your faulty upstream position 1 NOx Sensor with the WJIECO 12680215 NOx Sensor restores accurate engine-out NOx measurement for the DEF dosing system. Reliable upstream NOx readings allow the ECM to maintain proper DEF injection rates, clear NOx and SCR related diagnostic trouble codes, remove engine power derate restrictions, and complete emissions readiness monitors required for state inspection. For L5P Duramax owners who tow heavy trailers, 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 L5P Duramax truck owners and professional diesel repair facilities.

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

This 12680215 NOx Sensor is a true direct-fit replacement for the factory upstream position 1 NOx Sensor on GM 6.6L L5P Duramax 2017–2019. 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 12680215 NOx Sensor is fully bench tested before shipment. If you need a reliable 12V upstream NOx Sensor compatible with 12680215 SNS317A for GM 6.6L L5P Duramax, this WJIECO NOx Sensor will return your SCR emissions system to normal operation.

Product Tags

12680215, SNS317A, 12718742, 12680619, NOx Sensor, Nitrogen Oxide Sensor, upstream position 1 NOx sensor, GM 6.6L L5P Duramax NOx sensor, Silverado diesel NOx sensor, Sierra diesel NOx sensor, L5P 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.