MIL on following change of Lambda sensor?

[deep purple]

Recently had the need to change over sports cat to standard cat and back again on my S2 to get through mot emissions test. During this operation managed to damage the lambda sensor, so replaced with new. MIL is still illuminated, does it need time to readjust itself? Taken it out once and started it up a few times to try and clear it. Still no joy.

[EliseNick]

This is interesting. I just had the dealer change my lambda sensor (as part of MOT). My MIL is still on. I believe it should have been reset, but I think it will reset itself after three trips with no error present. What constitutes a trip I don't know.

I'd be interested to see any replies!

Cheers,

Nick

[LotusEater666]

It only does the sensor check from cold I believe. I changed my post cat sensor recently and reset the MIL with OBD tool and it stayed off as expected. Otherwise 3 starts from cold may clear it.

[deep purple]

Hi Nick,

Interestingly, your dealer did not reset the MIL, therefore I assume they believe it should clear itself. I'll ring a lotus dealer on Monday and ask them what should happen here. You'll guess from all of this my light is still on, however all I've done to date is one run, and three on/off starts.

[EliseNick]

I just rang the dealer, and they said to swing by and they'd reset it. The chap mentioned something about a "drive cycle"(?) - fifty or sixty miles of driving - needed for it to reset itself. Well, a trip to Silverstone and back at the weekend hasn't solved the problem...

Edited by EliseNick on Monday 22 June 17:11