EOBD not linkin

[puckingfassword]

Trying to find fault codes but reader says cannot link. Have tried an expensive reader and two much cheaper readers
Maxi scan ms3000. States linking error. Car is 2005 182.
Incidentally radio and cigar lighter works, someone suggested may be on the same fuse.
Have used another cheaper make before and that one linked okay.

 

[puckingfassword]

Anybody got any ideas please.
Disconnected battery for 10 minutes in case this helped but snap on
Tester still not connecting . The plug is pushed in all the way.
Car is bog standard from factory.

 

[mad in general]

Does the car start and run? If not then check your earths

 

[puckingfassword]

Car starts and runs but failed mot on lambda test.
Maybe inlet leak or 02 sensor fault . Emil light occasionally came on but goes out after driving.
Just trying to find faults stored

 

[bloke]

am sure it's on it's own fuse? if the reader powers up from the port then there is power.