a few more details are needed for an answer:

- which interface are u using? elm or kkl?
- is it properly working? can u connect to your engine ECU?
- are u sure your CNG ecu is 5D0/EOBD? previous version (5D0) is not supported

I'm not a pro on chip tuning, but from what I know to avoid mil/dtc error it's not enough to remap only the expected air quantity/egr, but you ave to disable egr by changing a certain address from 001 to 000. The address is ecu dependent. If you do that you should read 0 or 1200 on desired air quant...

I don't know the calculation behind "desired intake air quantity"

which ecu are we talking about? EDC15C7 or EDC16C39?

Ok... wrong idea

If the wirings are ok (especialy the egr pins) and you have check MAF and everything else I haven't any other (wrong) idea

Only a last (stupid) question:

Do you have swithed off EGR AND modified the Expected Air Quantity Map?

Not sure ... but I'll try to explain my idea.

It looks like a faulty EGR valve, probably it's only dirty and it doesn't close the gate properly or it's blocked.

Even if it's escluded by remap the cross-check with MAP data could give this error.

PS.: sorry for my bad english

Hi! i would like to thank anyone that contribute to this thread, and especially Alfaeddy for his precious help. reading this thread I was able to get my interface working flawlessly. My interface has the same pcb (there is written 2012-02-06 b1uwOBD V1.6 ) as betyargabor (page 36) and fiatbravoemoti...