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  • DTC P2407 stands for “Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic.” It’s logged when the PCM receives the wrong voltage signal (or no signal at all) from the leak detection pump sensor.
  • A malfunctioning detection pump, a bad purge valve, a blocked charcoal canister, or a PCM issue are some of the issues that can trigger the P2407 code.
  • A lit check engine light is the trouble code’s most common symptom.

Some evaporative emission systems (EVAP) rely on a leak detection pump sensor to keep track of the pressure level and spot any signs of a leak. The sensor sends its readings to the powertrain control module (PCM), which will log the appropriate diagnostic trouble code if it finds any discrepancies. If the PCM receives an intermittent or erratic voltage signal from the leak detection pump sensor, its diagnostics will log a P2407 code.

What Does the P2407 Code Mean?

The diagnostic trouble code (DTC) P2407 indicates “Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic.”

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The EVAP system is an important part of a vehicle’s emission control. It collects vaporized fuel from the fuel tank and stores it in the EVAP cylinder. When the engine needs to burn more fuel to meet the current load, the EVAP system releases the fuel vapor.

car intake manifold clear view
A leak compromises the effectiveness of the EVAP system by allowing fuel vapor to escape into the atmosphere before it can reach the intake manifold.

A leak compromises the effectiveness of the EVAP system by allowing fuel vapor to escape into the atmosphere before it can reach the intake manifold. To counteract this potential problem, the leak detection pump sensor constantly checks the pressure within the system. If the pressure drops without explanation, there is likely a leak somewhere.

The PCM regularly checks the signals from the leak detection pump sensor. If the sensor doesn’t transmit its signals in time or sends the wrong voltage signals, the controller will set the generic code P2407.

Note: The definition of code P2407 can differ depending on the vehicle manufacturer. Check the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P2407 Code?

What are the Common Symptoms of the P2407 Code?

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How to Diagnose the P2407 Code

The P2407 code is a generic code that can be logged by various vehicle makes and models. Its underlying problem and symptoms can vary between cases for various reasons, such as differences between manufacturers.

If you’re not confident about conducting diagnostic tests on your vehicle, it’s a good idea to bring it to a professional mechanic. Otherwise, you can go ahead and diagnose the issue yourself. To help you get started, here is a video that can give you an idea of what the process might involve:

How to Fix the P2407 Code

Anyone who wants to fix a P2407 code will need specific tools and knowledge to test and repair or replace the leak detection pump sensor. If you lack either or both, it’s best to let an expert resolve the issue for you.

If you’re a DIYer who has the advanced technical knowledge and hands-on experience required to effectively test and replace a faulty leak detection pump sensor, it helps to consult a repair manual or refer to an online repair database. Make sure you look for vehicle-specific information to ensure you’re following the right steps and protocols for your ride.

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Where to Shop for a Leak Detection Pump

A leak detection pump is a critical component that can detect when there are vapor leaks in the fuel system. When it’s time to replace this component, you don’t have to worry. Getting a replacement is quick and easy with

Get your hands on a new leak detection pump without leaving the comfort of your home. Shop from our website and use our vehicle selector to narrow down your options to parts that fit your vehicle.

All products in our catalog are sourced from the top parts manufacturers that use state-of-the-art technology to ensure that each part is engineered to match OE specifications. Our warehouses are strategically located all over the US, so you can expect your orders to reach you in just a few days.

About The Authors
Written By Automotive and Tech Writers

The Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Reviewed By Contact Center Manager and Technical Reviewer at

William “Bill” Guzenski has produced hundreds of how-to videos for the automotive community. He’s an ASE Certified Master Automobile Technician, and is affiliated with the Specialty Equipment Market Association (SEMA). He loves attending race events and car shows throughout the country, as well as traveling in his 40-foot motorhome, exploring abandoned mines and ghost towns.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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