Is the current Citroen 1.5 Hdi engine locked out to tuners?

[Maxr]

Yes, I know the following is illegal, but I'm just enquiring out of idle curiosity, of course:

Anyone know whether the engine management on the current Citroen 1.5Hdi diesel as fitted to the C5 Aircross etc is locked out to tuners? I believe a few years ago you could switch off troublesome AdBlue systems and eco-optimise this engine to produce cleaner exhaust than standard. Someone told me some makers have now locked the engine managements systems to prevent tuners accessing such things - thanks!

[GiveMeABreak]

Can't provide any advice on this forum for that as it is illegal to disable emissions systems as you've said.

But yes more ECUs are protected with anti-tune technology by the manufacturers which in your case will be Bosch. There is no bypass I am aware of at present for these newer ECUs of which yours is likely to be a MD1CS003.

[Maxr]

Thanks Marc!