Mazda Rx8 192ps 2004 - Fault code 01 Pend 00 - RThomson

Just got my car back from the garage after having the clutch replaced, spark plugs and ignition coils. Driven the car around 10 miles and the engine warning light has come on. I used a car code reader and it gave me the code 01 pend 00. Does anyone know what the problem may be? There is nothing that appears to be wrong with the car and it is driving perfect. Thanks