p442 small leak check gas cap

[garner13]

MY 2005 X5 3.0 SES light came on and I went to the auto parts to have them to read the code. It said p442. I changed the gas cap with a BMW and cleared the code. When I started up the car check gas cap message came up. After about three days of driving, my SES light came back on. I put a new gas cap and purge valve on it So o assume that is not the problem. Any ideas on what I should look at new. I am leaning toward changing out my entire evap system but if it is a simple fix I can save that time and money.

[jclausen]

Now you need to smoke test the evap system the dmtl pump I believe lives in the right r wheel wheel area so before the test remove the wheel well liner to see if anything leaks there check the faults again to see if it's the exact same one

[White94RX]

This is why proper diagnosis is important before you just throw parts at it. A simple smoke test would probably pinpoint the exact failure point versus you just throwing away money.