Hi..

Hopefully i can help..

As far i can see P0340 indicates a likly problem detected in the camshaft position sensor circuit. which means the problem could lie in any part of the circuit - the sensor in its self is indeed at fualt so a replacment one would need to be fitted, the wiring from the sensor to ecm, or the ecm itself is as you mention "could" be a fault / Symptoms for the above code can included :- Hard starting or no start Rough running / misfiring Loss of engine power...The usual checks inc:- inspection of all the wiring and connectors in the circuit / Check for continuity in the circuit wiring / Check the operation (voltage) of the camshaft position sensor Replace the camshaft position sensor if required / Check the crankshaft position circuit as well as above..if the ECU/ECM is likly to be at fualt then there are many online companys who can check faulty ecus and in some cases may repair them - but if at all possible if you do have somebody locally that can carry out ecu checks "maybe a proper diagnostic technician with the required equipment" just to be sure it is actually a fault then that maybe the best step forward - if you can't find anyone local then as above - there are many online ecu repair companys out there if you search google for example and see wether that might be a better option - you will obviously need to remove the ecu itself and send it off in secure packaging "recorded delivery" for testing...