Lamda sensor fault code... Weird...

[whiskychaser]

This is bugging me - but I like puzzles so does this sum it up? :
1. You dont get a CEL.
I would say you never will cos they arent connected on Euro spec cars
2. We got code 28
Either my kit is up the wall or the DME is throwing a wonky code.
( I asked my local BM place if they had heard of it - chocolate and fireguard come to mind)
3. Its better if you disconnect battery or wipe the code - for a time.
Something is telling the DME there is a problem. Maybe check the input at the DME pin where the O2 signal is supposed to go? I know the reading is roughly 450mV but that may be AC. (If it is, you can block the DC element out ) Maybe someone can confirm?

[e34.535i.sport]

This is bugging me - but I like puzzles so does this sum it up? :
1. You dont get a CEL.
I would say you never will cos they arent connected on Euro spec cars
2. We got code 28
Either my kit is up the wall or the DME is throwing a wonky code.
( I asked my local BM place if they had heard of it - chocolate and fireguard come to mind)
3. Its better if you disconnect battery or wipe the code - for a time.
Something is telling the DME there is a problem. Maybe check the input at the DME pin where the O2 signal is supposed to go? I know the reading is roughly 450mV but that may be AC. (If it is, you can block the DC element out ) Maybe someone can confirm?

Hey - thanks to going to all that trouble for me! I wouldn't even bother ringing the dealership here in Liverpool - They have no idea what you're talking about half the time... And that's when you've only got as far as "Hello"... LOL!

Checking the input sounds like a plan if it degenerates again, as it has been better since we reset it (I had disconnected the battery a week previous)... I might have to ask for your services again on that one though??!!! I'll bring the Clay bar down and shine up the whiskymobile in return of course [That's as far as my skill goes!!]. (In response to previous comment - no offence meant at all! )