OBD-Heavy duty vehicles

[ravim]

I would like to get clarifications for european heavy duty OBD:
1. Whether "Misfire" monitoring is required for heavy duty CNG vehicles?
2. Whether NOX sensor is mandatory for EOBD stage-I for heavy duty diesel vehicles equipped with SCR systems? Or is it be possible to comply with EOBD stage I requirements only with urea quality sensor?

[ramanujamsp]

Even i am also looking for the same.

Any one can share how OBD implemented or strategy adapted for diesel , CNG engines?

Ravi Sir, hope we will get the response !