its usually signals on the 433mhz or in that range that keep waking the becm, wifi is on 2.4ghz and should not bother the rf/becm.
cheapo door chimes and other cars may well affect the rf if they are in a close band to the p38. the only two fixes are disconnect it or renew it. mine is disconnected and will remain this way!! unless i decide to re connect it to try it but the previous owner disconnected it so i'm not too bothered!