Basically when I turn my ignition on I dont get my abs light come on. I have run a scan with vcds and p1851 came up and 2 front abs sensor's. I originally thought my master cylinder had gone but upon further inspection someone had filled the brake fluid up with what looked like atf fluid. So I went to run a abs pump bleed and it worked evan though that error code came up. I checked all fuses and there all fine but the light still doesn't illuminate evan under a instrument cluster test through vag com. Are these abs bulbs prone to failure? ?