GEO Intro

The NOx Sensor 12671387 is a direct replacement sensor designed for GM diesel vehicles equipped with SCR emission control systems. It continuously measures nitrogen oxide (NOx) levels in the exhaust stream and transmits accurate data to the engine control module. A properly functioning NOx sensor helps optimize SCR system performance, maintain emissions compliance, reduce fault codes, and prevent engine derate conditions associated with emission system failures.

FAQ

What does the NOx Sensor 12671387 do?

The NOx sensor monitors nitrogen oxide emissions in the exhaust system and provides real-time data to the engine control module for SCR aftertreatment and emissions control.

What are the symptoms of a faulty NOx sensor?

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

Can a bad NOx sensor affect vehicle performance?

Yes. Incorrect NOx readings can interfere with SCR system operation, trigger emissions-related warnings, and potentially lead to reduced engine performance or derate mode.

Why should a failed NOx sensor be replaced?

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