Description
New Inlet NOx Sensor for Detroit Diesel Engines, Part Number A0101531928
Why Choose This Detroit Diesel NOx Sensor Inlet From HHP?
- 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 handle the demands of daily heavy duty operation
- No core charge required
- Backed by a 1 Year Warranty from HHP
- Cross references 101531928, 3FL008, A0101531928, A101531928, CONTIREF5WK97341A, DDE EA0101531928, DDE EA101531928, DDE RA101531928, DDERA0101531928, EA0101531928, EA101531928, RA0101531928, and RA101531928
- Fits Detroit Diesel ALL engine families
What the Inlet NOx Sensor Does and Why Its Location Matters
Not all NOx sensors on a Detroit Diesel engine serve the same role, and understanding the difference matters when diagnosing an aftertreatment problem. The inlet NOx sensor is positioned upstream of the selective catalytic reduction (SCR) catalyst, measuring the concentration of nitrogen oxides in the exhaust stream before it enters the SCR system. This upstream reading gives the ECM a baseline NOx load to work with, allowing it to calculate the correct amount of diesel exhaust fluid to inject into the exhaust stream ahead of the catalyst.
Without accurate inlet NOx data, the ECM cannot dose DEF correctly. Too little DEF means the SCR catalyst cannot fully convert NOx into harmless nitrogen and water, resulting in elevated tailpipe emissions and potential compliance failures. Too much DEF leads to ammonia slip, which triggers its own set of fault codes and can damage the catalyst over time. The inlet sensor is the starting point for all of that dosing logic, and when it fails or sends inaccurate data, the entire SCR system is compromised from the first step in the process.
A failed inlet NOx sensor on a Detroit Diesel engine typically generates fault codes related to NOx control, SCR efficiency, or DEF dosing performance, and in many cases triggers a derate condition that limits engine output until the fault is resolved. Replacing the faulty sensor promptly with a quality new unit restores accurate upstream NOx monitoring, allows the ECM to resume correct DEF dosing, and clears the path back to full engine power and emissions compliance.
About This Detroit Diesel NOx Sensor Inlet
This is a brand new inlet NOx sensor, HHP part number A0101531928, engineered as a direct fit replacement for Detroit Diesel engines across all engine families listed under the Detroit Diesel ALL designation. It cross references a comprehensive list of OEM and aftermarket part numbers including 101531928, 3FL008, A0101531928, A101531928, CONTIREF5WK97341A, DDE EA0101531928, DDE EA101531928, DDE RA101531928, DDERA0101531928, EA0101531928, EA101531928, RA0101531928, and RA101531928. If your existing inlet sensor carries any of these numbers, this unit is the correct replacement.
This sensor weighs 10 lbs and ships in a 24 by 3 by 2 inch package. There is no core charge on this sensor, which means no deposit required 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 HHP’s team to verify fitment for your specific Detroit Diesel application before the part ships, helping you avoid the cost and delay of an incorrect order.
Get Your Detroit Diesel NOx Sensor Inlet From Highway and Heavy Parts
At $306.53 with no core charge, a 1 Year Warranty, and same-day shipping on in-stock orders placed by 2PM EST, this is a cost-effective and fast repair for any Detroit Diesel experiencing inlet NOx sensor related fault codes, SCR performance issues, or derate conditions caused by bad upstream NOx data. Financing is available through PayPal Pay Later and Sezzle for qualified buyers. HHP’s ASE certified technicians are also on staff to help you confirm whether the inlet or outlet sensor is the source of your fault codes, verify fitment, and answer any installation questions before and after your purchase.
Order your Detroit Diesel NOx Sensor Inlet (A0101531928) from HHP today.
Frequently Asked Questions About Detroit Diesel NOx Sensor Inlet (A0101531928)
1. What engines does NOx sensor inlet A0101531928 fit?
This sensor is built for Detroit Diesel engines across all engine families listed under the Detroit Diesel ALL designation. HHP recommends submitting your Engine Serial Number or VIN before ordering so our team can confirm this is the correct inlet sensor for your specific Detroit Diesel application before the part ships.
2. What OEM part numbers does A0101531928 replace?
This inlet NOx sensor cross references 101531928, 3FL008, A0101531928, A101531928, CONTIREF5WK97341A, DDE EA0101531928, DDE EA101531928, DDE RA101531928, DDERA0101531928, EA0101531928, EA101531928, RA0101531928, and RA101531928. If your existing sensor carries any of these numbers, this is the correct replacement.
3. Is this NOx sensor inlet new or remanufactured?
This is a brand new inlet 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 is the difference between an inlet NOx sensor and an outlet NOx sensor?
The inlet NOx sensor is positioned upstream of the SCR catalyst and measures the NOx concentration in the exhaust before it enters the catalyst. The outlet sensor is positioned downstream and measures what exits after SCR treatment. The ECM compares both readings to evaluate SCR conversion efficiency and adjust DEF dosing accordingly. Each sensor plays a distinct role and the two are not interchangeable.
5. What are the symptoms of a failing inlet NOx sensor on a Detroit Diesel engine?
Common symptoms include active fault codes related to NOx control, SCR efficiency, or DEF dosing accuracy, engine derate or reduced power output, increased DEF consumption, failed emissions inspections, and dashboard warning lights related to the aftertreatment system. Because the inlet sensor is the starting point for DEF dosing logic, a failure here affects the entire SCR system downstream.
6. Can a bad inlet NOx sensor cause engine derate on a Detroit Diesel?
Yes. When the ECM receives inaccurate or missing data from the inlet NOx sensor, it cannot calculate the correct DEF dose for the SCR system. This can push the engine into a derate condition to keep the truck within emissions compliance thresholds. Replacing the failed sensor with a new unit restores accurate upstream NOx data to the ECM and allows the engine to return to full power operation.
7. Is there a core charge on this inlet NOx sensor?
No. This Detroit Diesel inlet NOx sensor carries zero core charge. There is no deposit required at checkout and nothing to return after the installation is complete.
8. What warranty comes with this sensor?
HHP backs this Detroit Diesel NOx Sensor Inlet with a 1 Year Warranty covering quality and fitment from the date of purchase.
9. How fast will this sensor ship?
In-stock orders placed by 2PM EST ship the same day, Monday through Friday. The sensor weighs 10 lbs and ships in a 24 by 3 by 2 inch package via UPS or FedEx, with delivery timelines varying by location.
10. Can HHP help me determine whether it is the inlet or outlet NOx sensor causing my fault codes before I order?
Yes. HHP has ASE certified technicians on staff who can review your specific fault codes and engine information to help identify whether the inlet sensor, the outlet sensor, or another component in the aftertreatment system is the root cause of the issue, and confirm that A0101531928 is the correct replacement part for your Detroit Diesel before your order is placed.
