Does anyone know how I can get the stored error codes from the diognostic test point of my Volvo 440. The ECU is a seimans type and the fuel system is a B16F. The car has been idling roughly over the past 9 months. While cold the idling is quite rough. After this the idling speed settles at about 1000RPM. This is set by the constant idling system. However, when the throttle is pumped the revs fall to about 600RPM before picking up to 1000RPM. It has recently been cutting out. When this happens, it will not restart until at least an hour later. There may be a temperature issue and I'd like to see if the error codes will give me any clues.
Maurice.