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Cummins  |  SKU: 212-571-0002

212-571-0002 | Genuine Cummins® NOx Nitrogen Oixide Sensor

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Description:
A NOx (Nitrogen Oxide) sensor 212-571-0002 is an electronic device used in internal combustion engines (especially diesel engines) to detect and measure the concentration of nitrogen oxides (NO and NO₂) in the exhaust gases. These pollutants are harmful to human health and the environment, so monitoring and controlling them is crucial for meeting emissions regulations.

Part Number: 212-571-0002, 2125710002
Condition: New
Manufacture/Brand: Cummins

Fits 212-571-0002 For Cummins engine systems B6.7 F3.8 ISB6.7 ISL9 ISX12 ISX15 L9 QSB3.3 QSB6.7
Engines: B6.7 CM2350 B121B, ISL9 CM2350 L101, ISB6.7 CM2350 B101, QSB3.3 CM2250 EC, QSB6.7 CM850(CM2850), ISL9 CM2350 L111, L9 CM2350 L116B, F3.8 CM2350 F133C, B6.7 CM2450 B155B, ISX15 CM2350 X101, ISX12 G CM2180 EJ, L9 CM2450 L126B, ISV (Nissan)

Purpose of using 212-571-0002:

1. Emissions Control

Measures NOx levels in the exhaust to ensure they stay within legal limits (EPA, Euro 6, etc.)
Helps reduce harmful pollutants that contribute to:
Air pollution
Smog
Acid rain
Respiratory and cardiovascular problems

2. Enables SCR (Selective Catalytic Reduction) System

SCR uses Diesel Exhaust Fluid (DEF/AdBlue) to convert NOx into harmless nitrogen (N₂) and water (H₂O).
The NOx sensor provides feedback to control how much DEF to inject.
Ensures proper dosing to avoid:
Overuse (wasting DEF)
Underuse (failing emissions requirements)

3. Engine Performance Optimization

Works with the ECU (Engine Control Unit) to adjust:
Air-fuel ratio
Exhaust gas recirculation (EGR)
Combustion timing
Helps balance fuel economy, power, and emissions

4. Diagnostic and Safety Functions

Detects when emissions systems (like SCR or DPF) are failing or underperforming
Triggers check engine lights, fault codes, or limp mode if NOx levels exceed safe limits
Required for onboard diagnostics (OBD) compliance


Signs of a Bad NOx Nitrogen Oixide Sensor 212-571-0002:

  • Check engine light (MIL)

  • Poor fuel efficiency

  • High DEF (AdBlue) consumption

  • Failed emissions tests

  • Error codes like P2201, P229F, P20EE, etc.


About the Manufacturer – Cummins:

Cummins is a leading American manufacturer of diesel and natural gas engines, as well as power generation systems and emissions solutions. Founded in 1919 and headquartered in Columbus, Indiana, Cummins is known globally for its durable, high-performance engines used in trucks, buses, construction equipment, agriculture, and power systems.

The brand is widely respected for its innovation in clean diesel technology, including aftertreatment systems, turbochargers, and advanced electronics that help reduce emissions while maximizing engine efficiency and reliability.

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