Genuine CNH AdBlue® Quality & Concentration Sensor for Case IH Maxxum, New Holland T6 & Steyr Profi / CVT Tractors - Part Number: 38017893
The electronic AdBlue® (DEF) fluid quality and concentration sensor (part number 38017893, original CNH OEM references I47520143, 47520143, 5802862326) is an OEM-grade precision monitoring component engineered for closed-loop SCR exhaust aftertreatment systems on modern agricultural Stage V diesel equipment. Positioned within or along the DEF tank module, it evaluates in real time the urea chemical concentration (target 32.5% compliant with ISO 22241) and detects fluid dilution, improper water mixtures, or foreign chemical contamination (such as fuel or coolant). Transmitting continuous diagnostic telemetry via the vehicle's CAN-bus network directly to the engine control unit (ECU/DCU), it prevents anti-tampering engine de-rate triggers and preserves the operational integrity of dosing pumps and injectors. It provides direct plug-and-play fitment on Case IH Maxxum, New Holland T6 (including Stage V models), and Steyr Profi / Profi CVT tractor ranges.
Key Features & Engineering Advantages
- Continuous Concentration Monitoring (AUS 32 Standard): Accurately tracks urea-to-water ratios, verifying the mandatory 32.5% concentration necessary for efficient NOx reduction across all ambient conditions.
- Tampering & Contamination Prevention: Immediately flags non-compliant fluids, water dilution, or petrochemical contaminants before improper media can circulate into the dosing unit and catalytic substrate.
- Solid-State Ultrasonic / Electrochemical Sensing: Employs durable solid-state measurement without moving parts, fully resistant to chemical attack, fluid crystallization, and cyclic vibration.
- Integrated CAN-Bus Communication & IP67/IP69K Ingress Protection: Fully sealed automotive harness interface shields electrical pins against dust, mud, aggressive urea salts, and pressure washdowns.
- Direct CNH OEM Replacement: Fully interchangeable with factory part numbers I47520143, 47520143, and 5802862326 across Case IH, New Holland, and Steyr agricultural platforms.
Technical Specifications
| Commercial Part Number |
38017893 |
| Original Equipment References (OEM CNH) |
I47520143, 47520143, 5802862326 |
| Component Classification |
AdBlue® / DEF fluid quality and concentration monitoring sensor |
| Monitored Fluid |
32.5% aqueous urea solution (AdBlue® / DEF / AUS 32 per ISO 22241) |
| Electronic Data Interface |
High-speed CAN-bus interface integrated into CNH onboard vehicle architecture |
| Environmental Ingress Protection |
IP67 / IP69K (resistant to field debris, chemical vapors, and high-pressure washdown) |
| Electrical Interface |
Sealed automotive-grade connector with anti-corrosive gold-plated terminals |
| Primary Function |
DEF quality compliance feedback and torque de-rate prevention on CNH Stage V engines |
Equipment Compatibility & Tractor Application Guide
| Manufacturer |
Series / Transmission Specification |
Supported Tractor Models |
| Case IH |
Maxxum Series |
Maxxum 135, Maxxum 145, Maxxum 150 |
| New Holland |
T6 Series (Standard) |
T6.145, T6.180 |
| T6 Auto Command Series (CVT) |
T6.145, T6.155, T6.160, T6.165, T6.175, T6.180 – all Stage V (07/20-) |
| T6 Dynamic Command Series (Dual Clutch) |
T6.145, T6.155, T6.160, T6.165, T6.175, T6.180 – all Stage V (07/20-) |
| T6 Electro Command Series (Semi-Powershift) |
T6.145, T6.155, T6.160, T6.165, T6.175, T6.180 – all Stage V (07/20-) |
| Steyr |
Profi Series |
4115 Profi Stage V (07/20-), 4125 Profi, 4125 Profi Stage V (07/20-), 4135 Profi, 4135 Profi Stage V (07/20-), 4145 Profi, 4145 Profi Stage V (07/20-), 6145 Profi Stage V (07/20-) |
| Profi CVT Series |
4115 Profi CVT Stage V (07/20-), 4125 Profi CVT Stage V (07/20-), 4135 Profi CVT Stage V (07/20-), 4145 Profi CVT Stage V (07/20-), 6145 Profi CVT Stage V (07/20-) |
Installation Advice & Workshop Notes: Allow the SCR purging routine to finish completely (approximately 2 minutes after engine shutdown) before beginning work, then disconnect the negative battery cable. Work in an environment of strict cleanliness to prevent dirt, dust, or non-SCR fluids from entering the DEF reservoir. Inspect all sealing rings and replace any aged gaskets; torque mounting fasteners to specification without placing mechanical stress on the electrical socket. Once installed and refilled with fresh, certified ISO 22241 AdBlue®, reconnect the battery and perform the DEF quality adaptation reset and DTC fault clearance using an authorized CNH diagnostic tool.
