P2404 Code: Evaporative Emission System Leak Detection Pump Sense Circuit Range / Performance

If you see the P2404 code on your scan tool, then your vehicle’s evaporative emissions (EVAP) system might be faulty. Learn about the P2404 code, its definition, common causes, and common symptoms in this article.

What Does the P2404 Code Mean?

Diagnostic trouble code (DTC) P2404 code stands for Evaporative Emission System Leak Detection Pump Sense Circuit. This code is triggered when the leak detection pump sense circuit sends an incorrect signal to the powertrain control module (PCM). The leak detection pump creates a vacuum to check if the EVAP system has any leaks. The EVAP system is responsible for making sure that fuel vapor doesn’t escape into the atmosphere.

Note: The definition of the P2404 code can be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Symptoms of the P2404 Code?

Usually, the only noticeable symptom of the P2404 code is an illuminated check engine light. However, if the P2404 code is triggered, it’s common for other trouble codes related to the EVAP system to also be stored.

What are the Common Causes of the P2404 Code?

There are several problems that can trigger the P2404 code including:

• Faulty EVAP leak detection pump
• Clogged EVAP leak detection pump filter
• Leak in the EVAP system
• PCM Failure
• Wiring issue
• Blockage in the EVAP system

How to Diagnose the P2404 Code

While the P2404 code’s definition implies that the problem is related to the leak detection pump, this is not always the case. To resolve this DTC, you must determine the main cause first. This could require a visual examination of the affected components. This job may also require the use of specialized equipment and knowledge. If you’re new to DIY repairs, we recommend that you go to a professional mechanic for help.

How to Fix the P2404 Code

There is no magic bullet when it comes to resolving OBD-II codes because they can be caused by a variety of issues. To determine the best course of action, you must first obtain an accurate diagnosis.

Once you’ve figured out what’s causing the P2404 code, you can look for solutions from reputable internet repair resources and how-to guides. Always consult your vehicle’s repair manual when troubleshooting and repairing diagnostic codes.

Chilton repair manuals can also be useful. ALLDATA subscriptions, on the other hand, could be because they include specific factory repair information for drivers who wish to perform their own repairs.

It’s best to consult a professional mechanic if you don’t have much experience diagnosing or repairing error codes.