Mechanics

OBD CODE 0420,WHAT IS THAT?

2002 Citroen Saxo • 69,000 miles

My saxo eml light came on and then the tick over went high and low then settled but the light is still on, saxo 1.1 (2002) THE EML LIGHT CAME ON, THE TICK OVER WENT HIGH AND LOW BUT THE LIGHT IS STILL ON, HAD IT RESET BUT IT CAME BACK ON, OBD CODE 420, WHAT IS THAT?
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Claire stuart
March 8, 2012.




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