What Codes Will This Page Cover?
On this page, you’ll learn more about the following codes:
- P2404 – Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance
- P2405 – Evaporative Emission System Leak Detection Pump Sense Circuit Low
- P2406 – Evaporative Emission System Leak Detection Pump Sense Circuit High
- P2407 – Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Error
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What Is the P2404 Code?
Symptoms
Causes
Seriousness
Can I Still Drive?
Diagnose
Difficulty of Inspecting
Get Additional Help
Codes P2404, P2405, P2406, and P2407 are all about issues with your evaporative emissions system, or EVAP system. To manage the fuel vapor correctly, your vehicle must ensure that the EVAP system is airtight with no leaks, which is why you have a leak detection pump sensor. This code doesn’t necessarily indicate that there is a leak occurring in your vehicle, but it does indicate that the leak detection pump sensor, which would be responsible for determining whether there’s a leak or not, is somehow malfunctioning and sending an implausible signal to your powertrain control module (PCM). For example, it may indicate that the current consumption of power is different than the reported power consumption through the circuit.
You may also be interested in P2403 – Evaporative Emission System Leak Detection Pump Sense
What Are the Symptoms of a P2404 Code?
Most of the time, there are very few symptoms of the P2404, P2405, P2406, and P2407 codes. Oftentimes, the only symptom you’ll notice is the check engine light turning on. If there are any other diagnostic trouble codes your vehicle is dealing with, those codes might result in their own symptoms. However, these codes don’t usually result in a huge list of symptoms, and you may not even notice any difference in driving.
What Are Some Causes of a P2404 Code?
There are many potential issues that can result in P2404, P2405, P2406, and P2407 codes. While this isn’t a complete list, here are a few of the most common causes:
- Faulty EVAP leak detection pump
- Faulty leak detection pump filter
- Leak within the EVAP system
- Faulty purge valve
- Clogged or broken charcoal canister
- Circuitry issues within the wiring harness
This code most commonly concerns an issue surrounding your EVAP pump or the leak detection pump sensor. The only way to know for sure is to take the diagnosis time necessary to ensure you understand the problem.
How Serious Is the P2404 Code?
OBD-II codes P2404, P2405, P2406, and P2407 alone might not sound that serious initially. After all, they’re indicating that there’s a problem with the leak diagnostic process, not that there’s an actual problem with your engine. However, being unable to tell whether there’s a consistent problem can absolutely turn into a serious problem. While you might be able to drive just fine right now, your vehicle won’t be able to tell if there’s a vacuum leak in the future, which can result in problems with emission control. Similarly, you might also experience problems with your fuel tank, fuel filter, and low fuel efficiency over time. Definitely treat this code as a serious problem.
Can I Still Drive with a P2404 Code?
You will most likely be able to drive with the P2404, P2405, P2406, and P2407 codes active. These fault codes don’t usually have drivability problems as a common symptom, so you probably won’t see any serious issues with your vehicle’s core function. However, it’s still best to stop driving until you can get diagnostic tests from an expert. An auto repair shop will be able to do the work necessary to ensure your vehicle doesn’t run into any severe issues in the future due to this code.
How Easy Is It to Diagnose a P2404 Code?
Diagnosis for the P2404, P2405, P2406, and P2407 codes can often be difficult. After all, you need to understand what a default reference phase looks like, what your engine compartment is supposed to look like, how leak detection pump failure can impact the rest of your vehicle, and how to look up possible issues in the repair manual. If you’re not well-versed in the diagnostic process for your vehicle, it’s best to leave it up to the experts.
How Difficult Is It to Inspect a P2404 Code?
As with the diagnostic process, most experts won’t recommend that you try to inspect the P2404, P2405, P2406, and P2407 codes by yourself. The inspection process can also be very difficult; you need to understand the normal combustion process in your vehicle and what might be creating a negative impact on that process through the EVAP system. For most people who don’t have extensive knowledge of the EVAP system, the P2404, P2405, P2406, and P2407 codes are not DIY codes, and it’s best to get help from an expert.
Need Additional Help with Your P2404 Code?
If you need extra help with the P2404, P2405, P2406, and P2407 codes, you’re definitely not alone. There are lots of people who choose to get extra help with these codes due to their general difficulty. The good news is that there are plenty of ways to get that help.
To start, you should find an auto repair shop in your area. These local auto repair shops are a great starting point for anyone who doesn’t want to go very far out of their way to get help with their repairs.
Additionally, it’s common for these codes to present alongside other codes as well. You can check out the OBD-II database to see what other codes mean and how they can impact your vehicle before you take it in.
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