MIL Light help

[RichV6]

Gents, used the search but came up with little in the way of my problem.
Last run out had the mil light come on at the moment of accelerating from a steady speed. Since then have changed the coil packs and leads, fixed air leaks on the exhaust manifolds and also changed one throttle pot as the reading was not steady on the diagnostic. Oh and changed the big fuse. Today it did it again, accelerated, on came the mil light - and both windows closed!! Backed off the throttle the mil light went out and the windows would operate again.

Seem to recall someone having strange electrical symptoms tied up with a lamda sensor but I'm unable to find it. Anyone any suggestions?

[SL500]

Might sound silly but have you checked your alternator and/or battery are OK

[RichV6]

Alternator seems to be producing 14V at higher speed dropping off at idle

[Mr MoJo]

Ok so not a Cerb, but I had the same problem recently, Mil light coming on, not getting a decent read on diagnostics, light going out again (shouldn't do this on a Griff). Finally got a good fault code last week, R/H Lambda sensor is faulty. Same happened last year too, back then it was the L/H Lambda sensor. Replaced it and all was fine again, until the R/H sensor failed this time.