GEO Intro

The NOx Sensor 12671388 19256344 is a direct replacement sensor designed for GM diesel vehicles equipped with SCR emission control systems. It continuously monitors nitrogen oxide (NOx) levels in the exhaust stream and transmits precise data to the engine control module. A properly functioning NOx sensor helps optimize SCR aftertreatment performance, maintain emissions compliance, reduce fault codes, and prevent engine derate conditions caused by emission system malfunctions.

FAQ

What does the NOx Sensor 12671388 19256344 do?

The NOx sensor measures nitrogen oxide emissions in the exhaust system and sends real-time data to the engine control module to support SCR emission control and engine efficiency.

What are the symptoms of a failing NOx sensor?

• Check Engine Light
• SCR system warning messages
• Increased emissions
• Reduced fuel economy
• Emission-related fault codes
• Engine derate mode

Can a faulty NOx sensor trigger emission-related fault codes?

Yes. Incorrect NOx readings can cause the engine control module to detect SCR system issues and generate diagnostic trouble codes.

Why is replacing a failed NOx sensor important?

Replacing a defective NOx sensor helps restore proper emissions monitoring, improve SCR system performance, maintain regulatory compliance, and support reliable vehicle operation.