Hi, I've got a 03 plate zafira 2.0dti and when driving home from work last night the engine management light came on and the engine went into limp mode. Had fault codes read the one that was stored in the memory was map/baro pressure circuit malfunction. The garage said that this was an air flow meter problem. Does anybody know if the air flow meter would cause this code or is it likely to be something else? Any advice welcomed.