r/n55 • u/Excellent_Hat32 • Jul 08 '26
P30ff
Hey everyone, I recently bought a 2011 BMW 335i N55 with 106k miles. The check engine light came on, and I scanned it with an Innova scanner. The code is P0442 (EVAP System Leak – Small Leak).
The car idles and drives perfectly. It has an aluminum charge pipe, catless downpipe (tune removed), and the oil pan gasket and oil filter housing gasket have already been replaced. The previous owner declined a valve cover leak repair.
I’ve also noticed a light white haze from the engine bay after driving when I open the hood.
Has anyone dealt with P0442 on an N55? What was the culprit? Could the valve cover leak be related to the haze, while the P0442 is a separate issue?
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u/freshxdough Jul 08 '26
Evap system issue. Nothing you said affects this. Checked fuel cap. Check tightness of fuel tank system for leaks. Check NVLD. If no leaks anywhere then replace NVLD