2023-02-09 by UDIAG
What Is The EVAP System?
Your vehicle’s EVAP system (evaporative emissions control systems) are in place to prevent fuel tank vapors from escaping into the atmosphere. All cars and trucks are required to have an EVAP system to protect the environment from harmful fuel vapors and you from breathing them in.
How Can I Tell If There’s An EVAP Leak?
The main indicator for EVAP leaks is that the check engine light comes on. The check engine light may indicate a slight fuel odor. However, each vehicle is different. The check engine light can be caused by loose gas caps. It’s a good idea to test EVAP with a car diagnostic tool if your check engine light comes on while you have not filled up with fuel.
Is It Safe To Drive With An EVAP Leak?
Technically, you can drive safely with a leak but it isn’t recommended. Although you are unlikely to burst into flames when driving, others and the planet will be exposed to your vehicle’s fumes. That is not environmentally friendly.
Using UDIAG X-90 PRO to Make An EVAP Test
X-90 PRO is an advanced OE level car diagnostic tool which is equipped with Android system and 10.1” HD Touch screen. X-90 PRO supports 40+ required maintenance functions, such as EVAP test, AT adaptation, adjust fuel, injector coding, odometer, immobilizer, etc.
Simple steps of EVAP test are as follow:
#1 Connect our X-90 PRO and your vehicle via VCI
#2 Enter the maintenance functions interface and choose EVAP Test
#3 Perform the EVAP test as directed
If there are some problems with EVAP system, the trouble code will be showed on X-90 PRO interface. Just according to the trouble code to check and solve car problems.
FAQs
Q: What Codes Should I Look For On My OBD2 Scanner?
A: Some common codes include:
P0442 – Small leak detected
P0445 – System leak detected
P0440 – EVAP System
P0446 EVAP Vent solenoid valve control system
P0411 – EVAP system control incorrect purge flow
You may see other codes present, as the EVAP system has codes that run from 0440 to 0457.
Q: How Do I Reset The Check Engine Light And Code?
A: This process will differ based on the type of vehicle you own. Some models require the driver to turn the vehicle on and off a few times while placing the system into accessory (ACC) mode, while others require some combination of holding the trip reset button while pressing other controls. You can find the process for your specific vehicle through a quick online search, or by using a maintenance or repair manual for your model.
Q: Is There A Way To Prevent EVAP Leaks?
A: Regular inspection and maintenance of your vehicle’s fuel system is the best way to prevent EVAP leaks, but sometimes things just happen. The most common causes for EVAP leaks include bad seals and O-rings, a failing purge valve, a damaged hose or vent, or a defective leak detection pump. As you might have guessed, there’s no real way to prevent one of those components from failing unless you’d like to regularly replace components of your fuel system.
