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Check Engine Light EVAP Purge Control Valve Circuit Malfunction - P0443

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Check Engine Light EVAP Purge Control Valve Circuit Malfunction - P0443

Created on: 2020-06-08

This video shows you how to diagnose the check engine code P0443, which relates to several problems with the EVAP system.

Installation Video
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In this video, I'm gonna show you how to diagnose an EVAP purge solenoid circuit code. So if you scan your car, you have a check-in engine light, and you end up with an EVAP code and it happens to be a purge solenoid circuit code. Now under normal conditions, you just check the gas cap first. You can always do that just to be safe. But what that means is, the computer is not able to communicate with the purge solenoid whether the wire's bad or whether there's a connection issue or the solenoid is bad itself. It's always a good idea to start out after you get the code to just take a test light and check all your fuses, just make sure your fuses are good.

There's a little spot on the back of the fuse that you can check with the test light. Just go around If you have any bad fuses fix those first. On the engine, you wanna find where the intake is and find where the purge solenoid is. It's gonna be somewhere attached to the intake because it's gonna get the vacuum from there. And then there's going to be a vacuum line that goes back towards the gas tank. Now that's located right here on this vehicle. You wanna check the wiring? Make sure there's nothing loose, make sure the connection's still connected. Visually look at the wiring. Sometimes you may have a rodent that has chewed through the wires. Because it's an actual circuit code we know it has nothing to do with the vacuum side of the EVAP system.

So we can disconnect the wire. Just take a look at the terminal ends. They look pretty good, I don't see anything green or the terminals itself don't look spread or anything. So at the purge connector, disconnected it. I have my test light on ground and I'm going to check the orange wire and I power there, so that's good. So if I can send the command to the PCM to activate this, it should ground it on the ground side. All right so I have the other side of my test light hooked up to battery positive right there. And we gonna put it on the green wire looks like it's green and white stripe. We had to have the car running to do this test. All right, so that's in there, start, increase and if you look at the test light it's fluctuating, which is good, that's exactly what it's supposed to do.

It can go up to a 100%, It's almost done. And the test is only gonna let you do that for a short period of time and then it's gonna time out. But at least in that case, we know that the power on the ground is getting to that connector. So we have a bad purge solenoid. Right so that's a pretty simple circuit, It's only two wires. It's just the computer is not seeing that solenoid. Now the solenoid was stuck open and you had an open circuit. You might get a slight drivability issue, but most of the time, it's just gonna be a check engine light. If you enjoyed this video, make sure you subscribe to our channel, ring that bell and turn on all notifications so you don't miss any of our videos.

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