Cummins NOx Sensor, New (2236409PE)

New NOx Sensor for Cummins Diesel Engines, Part Number 2236409PE

Why Choose This Cummins NOx Sensor From 4BTdiesel?

• Brand new construction built to OEM specifications for proper fitment and function
• Manufactured in an ISO 9001:2015 certified facility for quality and consistency
• Crafted with hard-wearing strength and durability to withstand the demands of daily diesel operation
• No core charge required
• Backed by a 6-month warranty from 4BTdiesel
• Cross references 2236409, 2236409PE, and 5EL036
• Fits Cummins ALL engine families

Why a Failing NOx Sensor Is a Problem You Cannot Afford to Ignore

The NOx sensor is a critical component in the aftertreatment and emissions control system on any modern Cummins diesel engine. Its job is to continuously monitor nitrogen oxide levels in the exhaust stream, both upstream and downstream of the selective catalytic reduction (SCR) system, and report those readings in real time to the engine control module. The ECM uses that data to regulate diesel exhaust fluid dosing through the DEF injector, ensuring the SCR system converts NOx into harmless nitrogen and water efficiently and consistently.

When a NOx sensor begins to fail or sends inaccurate readings, the ECM loses its ability to manage DEF dosing correctly. The result is a cascade of problems that go well beyond a single fault code. An underperforming SCR system can cause the engine to enter derate mode to stay within emissions compliance thresholds, which reduces power output and fuel economy. Fault codes related to NOx efficiency, DEF quality, and SCR performance begin stacking up in the ECM, and in some cases the truck can be taken out of service entirely until the issue is resolved. Replacing a failed NOx sensor promptly with a quality new unit is one of the most cost-effective ways to restore aftertreatment system function and get your Cummins back to full operating capacity.

About This Cummins NOx Sensor

This is a brand new NOx sensor, 4BTdiesel part number 2236409PE, engineered as a direct fit replacement for Cummins diesel engines across all engine families listed under the Cummins ALL designation. It cross references OEM and aftermarket part numbers 2236409, 2236409PE, and 5EL036. If your existing sensor carries any of these numbers, this unit is the correct replacement.

This sensor is a lightweight part at 0.86 lbs, shipping in a 32.79 by 2.56 by 1.63 inch package, so it moves quickly through the shipping network regardless of your location. There is no core charge on this sensor, which means no deposit and nothing to return after installation. Because diesel engine and aftertreatment parts are engine specific, entering your Engine Serial Number or VIN on the product page before ordering allows 4BTdiesel’s team to verify fitment for your specific Cummins application before the part ships, helping you avoid the cost and delay of an incorrect order.

Get Your Cummins NOx Sensor From 4BTdiesel

At $316.80 with no core charge, a 6-month warranty, and same-day shipping on in-stock orders placed by 2PM EST, this is a straightforward and cost-effective repair for any Cummins engine experiencing NOx sensor related fault codes or SCR system performance issues. 4BTdiesel’s professionally certified factory mechanics are on staff to help you interpret fault codes, confirm fitment, and answer any installation questions before and after your purchase. Financing is also available through PayPal Pay Later and Sezzle for qualified buyers.

Order your Cummins NOx Sensor (2236409PE) from 4BTdiesel today.

Frequently Asked Questions About Cummins NOx Sensor (2236409PE)

1. What engines does NOx sensor 2236409PE fit?

This sensor is built for Cummins diesel engines across all engine families listed under the Cummins ALL designation. 4BTdiesel recommends submitting your Engine Serial Number or VIN before ordering so our team can confirm this is the correct sensor for your specific Cummins application before the part ships.

2. What OEM part numbers does 2236409PE replace?

This NOx sensor cross references 2236409, 2236409PE, and 5EL036. If your existing sensor carries any of these numbers, this is the correct replacement.

3. Is this NOx sensor new or remanufactured?

This is a brand new NOx sensor manufactured in an ISO 9001:2015 certified facility to meet OEM specifications and tolerances. It is not remanufactured, reconditioned, or rebuilt.

4. What does a NOx sensor do on a Cummins diesel engine?

The NOx sensor monitors nitrogen oxide levels in the exhaust stream at one or more points in the aftertreatment system, typically upstream and downstream of the SCR catalyst. It sends real-time data to the ECM, which uses those readings to regulate DEF dosing through the SCR injector and ensure the system is converting NOx into harmless nitrogen and water at the correct rate.

5. What are the symptoms of a failing NOx sensor on a Cummins engine?

Common symptoms include active fault codes related to NOx efficiency, SCR system performance, or DEF quality, engine derate or reduced power output, increased DEF consumption, poor fuel economy, and in some cases warning lights or dashboard alerts related to emissions system faults. A failed NOx sensor can also cause the truck to be flagged during emissions inspections.

6. Can a bad NOx sensor cause engine derate?

Yes. When the ECM receives inaccurate or out-of-range data from the NOx sensor, it may determine that the SCR system is not meeting emissions compliance thresholds and trigger a derate condition to limit engine output. Replacing the faulty sensor with a new unit restores accurate data to the ECM and allows the engine to return to full power operation.

7. Is there a core charge on this NOx sensor?

No. This Cummins NOx sensor carries zero core charge. There is no deposit required at checkout and nothing to return after the installation is complete.

Warranty

6-month warranty.

9. How fast will this sensor ship?

In-stock orders placed by 2PM EST ship the same day, Monday through Friday. The sensor weighs 0.86 lbs and ships in a 32.79 by 2.56 by 1.63 inch package via UPS or FedEx, with delivery timelines varying by location.

10. Can 4BTdiesel help me determine whether the NOx sensor is causing my fault codes before I order?

Yes. 4BTdiesel has professionally certified factory mechanics on staff who can review your fault codes and engine information to help determine whether a failed NOx sensor is the likely root cause of your aftertreatment issues, and confirm that 2236409PE is the correct replacement sensor for your Cummins application before your order is placed.