1235 is not a valid fault code. Some models will return implausible blink codes if the ECU has failed or if the power is interrupted during operation. Remove the control units' harness and reconnect after 10 minutes to reset the base values. Check to make sure that your battery is fully charged and then re-test the car to check what fault codes have reset.
This link should help if you don't already have it http://www.pelicanparts.com/bmw/tech...de_Reading.htm