Mystery check engine light

[Steve1986]

Was driving along the motorway earlier and my check engine light came on. Absolutely no change in how the car was running so I stopped briefly at a services, checked my oil and had a quick look to see if anything had come unplugged but couldn't see anything, then carried on to my destination.

When I got there I took my RSTuner and laptop to the car and plugged it in... and found zero fault codes.

I've been out to the supermarket and petrol station since then and the light is still illuminated, but there still aren't any fault codes, stored or pending or anything.

Any ideas?

 

[Brigsy]

Post cat lambda. Does it have a decat on it.

 

[Steve1986]

Post cat lambda. Does it have a decat on it.

It's got a 100cel sports cat, the lambda is a brand new Bosch one, and it's using a spacer specifically to prevent this kind of nonsense

 

[Brigsy]

It's got a 100cel sports cat, the lambda is a brand new Bosch one, and it's using a spacer specifically to prevent this kind of nonsense

Probably still put it on regardless of spacer with 100cel. Suprised nowt has come up with rstuner, clip would show

 

[Steve1986]

Probably still put it on regardless of spacer with 100cel. Suprised nowt has come up with rstuner, clip would show

I'll stick the computer on again later and check voltages etc, now I've got an idea of what to be checking