cold start error code once P054B, rough idle, went away after stopping and starting

[hinton]

as per subject, anyone seen this on theirs? mine is 80,000km (canada), dealer and indie maintained, usually is shorter intervals of km than recommended values.

at idle it was rough engine lateral movement, really bad sounding exhaust note.

after stopping and walking away, then turning back on issue gone but drive moderate error kept coming up till i cleared the code.

this is the bank b over retarded scenario at cold start.

on a side note my brake squel issue is officially gone, i will update my original thread. i was the one that switched to the hawk pads, i am about 8000km into the brake disc swap and there has been no squeal for at least the last 5-6 months, after the initial bedding in process.