Engine Problem

[Welshjam]

Hi All

I bought a BMW Z4 3.0 on a 53 plate just over a month ago ( RF53LDY ) It's got this forum sticker on it so I'm assuming a previous owner was on here. It's developed a problem.

When I'm driving the engine management light and the EML light comes on for a second and there is a slight loss of power. This only seems to happen if I'm in a high hgear going really slow or when I take my foot off accelerator for a length of time.

Apart from that it drives great. I've put my OBD2 scanner onto it and this has come up - P28B2 - cylinder 9 ion current sense - circuit low.

I've done a few searches online but nothing comes up. Anyone know what it means??

Cheers James

 

[Marlon]

'cylinder 9' :?

 

[fixit man]

Check for a split Rubber intake boot !

 

[mr wilks]

'cylinder 9' :?

Reader upside down maybe :?

 

[Pastry]

'cylinder 9' :?

Reader upside down maybe :?

:telloff: :lol:

 

[Welshjam]

'cylinder 9' :?

It's definetly a 9

 

[Welshjam]

Check for a split Rubber intake boot !

I'll have a look when it's stopped raining. Could be waiting a while

 

[Ewazix]

Ion current sensing is used to detect 'knock', so may be reporting an ignition timing issue. But I didn't realise it was used on the M54 engine and you obviously only have six cylinders :?

Maybe try a different OBD scanner