Condition: CAR OFF after up to temp. Any weather as I recall.
- In the quiet of the night (and you aren't suspecting it) it made me think a motorcycle was accelerating in the far distance...brrrrRRRRRRrrrrrrrrrrrr......... tapers down and done.
- Year or so ago, it seemed random to me. Definitely not persistent. LAST NIGHT after -key off- I sat in the car for about an hour on the phone. Same symptom audible inside car time-after-time-after-time at same interval +/-. About every 40secs. for AT LEAST AN HOUR!
--AND YES I have a DTC: P1456 + P0420. 'guessing' that the P0420 was caused by the 1456 (?)
--AND YES I've had the fuel vapour/smell issue for about 6-months (only noticeable sitting at idle, of course). No ongoing overnight fuel odor/leaks.
- Dammmit. Methinks I posted this already? Apologies. But 'then' the odor was the wory. NOW, the noise is beyond persistent for an hour after shutdown.
- Please advise, flame, or redirect accordingly. And THX as always!!!