There are two NOx sensors so the tech will need to determine which one is bad.

How do I know if my NOx sensor is bad?

NOx Sensor Problems Most times, this will be immediately obvious due to the illumination of your ‘Engine Warning’ light in the dashboard cluster, along with symptoms such as unstable idle, juddering/jerking while driving, and excessive fuel consumption.

What is a NOx sensor on a Duramax?

The NOx sensor is used to check the nitrogen oxide content of the exhaust to optimize exhaust and fuel economy.

Can I drive with a bad NOx sensor?

In conclusion, you can drive with a bad knock sensor—that is, if you want to destroy your engine and get atrocious performance from your car. The moment you confirm that your knock sensor has seen better days, it would be wise to swap it right away with a high-quality replacement.

Can you drive with a faulty NOx sensor?

In short, the answer is yes, you can drive a car that has a faulty knock sensor. That being said, you may not want to. The prolonged driving of a car that has a bad knock sensor can cause a lot of damage to the engine.

Can you drive with a bad NOx sensor?

What happens if NOx sensor fails?

If a NOx sensor fails, the vehicle can have multiple faults on the dashboard which will cap the power of your truck (Limp mode). As NOx sensors are directly linked to the SCR system, there will also be emission and general SCR system faults, which only add onto the list of issues.

Can NOx sensors be cleaned?

If you suspect that your oxygen sensor may be dirty, you can clean it by first removing the sensor from its housing in the vehicle, and then soaking the sensor in gasoline overnight.

Where is the NOx sensor on a 2011 Duramax?

exhaust system
This NOx sensor is located in the exhaust system.

How much does it cost to replace a NOx sensor?

One seated behind turbo, 61955-44600, called as sensor bank A with dealer price US$700-US$900, is responsible for monitoring the engine out NOX level….Available Shipping Options.

Why is NOx sensor so expensive?

Complexity and Cost Another drawback of amperometric NOx sensors is their high cost due to the multiple chamber design and the requirement for complex electronics to detect nanoampere current levels.

What is a NoX sensor on a GM car?

An ACDelco GM Original Equipment NOx (Nitrogen Oxide) Sensor is a GM-recommended replacement for your vehicle’s original component, and is an exhaust gas sensor that detects the nitrogen oxide content of the exhaust from diesel engines.

Why is my Duramax ECM not turning on the NoX sensor?

During a cold start, moisture in the exhaust system can interfere with NOx sensor operation. In this scenario, the Duramax ECM will not turn on the NOx sensor heaters until exhaust temperatures reach a certain threshold and condensed moisture is evaporated.

What does the gpcm do on a 2011 Duramax LML?

In the case of the 2011 Duramax LML (VIN 8) engine, the glow plug control module (GPCM) supplies constant voltage to both of the NOx sensor modules. If system voltage is low, an internal voltage boosting circuit in the GPCM will make up the difference to ensure proper NOx sensor operation.

What does the nitrogen oxide sensor do on a GM vehicle?

This information is used by the engine management computer to adjust various parameters to reduce harmful emissions. This original equipment nitrogen oxide sensor has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.