Meaning of 3 digit number block in display fields 1 and 2:

WARNING: This page is about a different car, the 2001 Volkswagen Jetta, 2001 Volkswagen Golf, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, and 2000 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.

When display positions = 1
1	2	3
		1	Oxygen sensor control active
	1		Oxygen sensor operationally ready
1			Oxygen sensor heating on