iv got a mk4 astra sri x20xev 2.0 16v engine iv had a mk3 astra sport x20xev engine fitted but there the same the old engine was running absolutly fine with no sensor problems at all but now this engine has been fitted and 10 diagnostics later its only coming up with the throttle position sensor (tsp) but its saying its got low voltage its voltage at the moment is 0.2v and should be 0.5 fitted brand new tps sensor brand new camshaft sensor what else can it be someone help cheers bob