On-board diagnostic (OBD) codes are designed to help mechanics and vehicle owners like you identify possible issues with your vehicle. But before attempting any fixes to resolve the codes retrieved by your scan tool, it’s important to know exactly what they mean.
Code P0444 is one of many trouble codes that may be logged and retrieved from the OBD system. Here is some basic information that may help you understand what getting this code may mean for your vehicle.
What Does the P0444 Code Mean?
Diagnostic trouble code (DTC) P0444 stands for “Evaporative Emission System Purge Control Valve Circuit Open.” This code is logged when the PCM detects a problem with the purge valve circuit.
On vehicles with an Evaporative Emission Control System (EVAP), fuel vapors from the gas tank are stored in a charcoal canister. Under precise operating conditions, the PCM opens the purge valve to draw the vapors from the canister into the engine’s intake manifold. The vapors are then burned as part of the normal combustion process.
The PCM monitors the voltage to the purge control valve and detects any voltage changes within it. If it notices a problem with the purge valve’s circuit, it logs error code P0444.
Depending on the severity of the problem, related error codes may also be stored with this DTC. Code P0444 is very similar to error codes P0443 and P0445.
Read our discussion about the EVAP system, how it works, and its evolution to fully understand codes like P0444.
Note: The definition of code P0444 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
What are the Possible Causes of the P0444 Code?
P0444 is a generic code, so it can have several triggers. Here are the most common:
- A faulty purge valve
- Circuit problems, such as damaged wires or loose connections
- PCM malfunction
What are the Common Symptoms of the P0444 Code?
You may notice the following symptoms if you drive a vehicle that has set a P0444 trouble code:
- Illuminated check engine light
- Reduced fuel economy
- Noticeable fuel odor in some cases
- Engine may idle rough, hesitate, or stall in some cases
- Sometimes there are no adverse conditions exhibited besides the check engine light
How to Diagnose the P0444 Code
Error code P0444 is a generic code that may be set across several makes and models. However, this does not mean that there is a one-size-fits-all approach to diagnosing its underlying cause. The steps for troubleshooting this code will vary depending on your vehicle’s make and model.
Check out the video below to get an idea of what the diagnostic process for this code might involve:
How to Fix the P0444 Code
P0444 may share similar triggers and symptoms with other fault codes. However, that does not mean that they share repair steps as well. All vehicles are different, so make sure to refer to a factory repair guide that is specific to your car.
If you’re considering troubleshooting this code on your own, it’s a good idea to refresh your auto repair knowledge before attempting any fixes. Always consult the vehicle repair manual or an online repair database to learn the appropriate diagnostic and repair procedures for this code. Alternatively, you may leave this job to a professional.
Where to Get a New Purge Valve for Your Vehicle
A faulty purge valve may cause your vehicle to suffer from poor fuel economy and frequent ignition troubles. To restore its performance and extend its service life, it’s best to consult a mechanic and replace worn-out components as needed. Thankfully, CarParts.com has a wide array of high-quality purge valves for you to choose from.
We trust the quality of our products because we source them from the most trusted manufacturers in the industry. This ensures you get parts that are worth your money and can last as long as your vehicle’s lifespan. Not only that, but we also offer 60-day returns and a lifetime replacement guarantee.
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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.
I have hyundai atos 2001 car when I start engine rpm is high and then gradually decrease z rpm when you select z gear shift and then again high what is possible solution to solve z prblem
Subscribe me please as I would like to get any information about DIY tools to detect and fix faults in my cars.
Hi, I have a 2006 bmw x3 3.01, and it failed the smog check because of Po444-EVAP system purge comtrol valve “A” circuit open, and I also have been having problems with the “Check Engine Soon” light going on and off, my BMW mechanic fixes it but it stills goes on. How much do I expect to pay for a purge replacement with labor?? Ball park price? Thank you for your video, it was very knowable and helpful!!!! Now I can go to my mechanic and know what he is talking about.
Thank You
Gloria M