2nd air gauge not working

[stevesparts]

Has anyone else had their 2nd air gauge not work right? as mine fluctuate reading right at times then not at all:s
I've try a different gauge and sensors but still the problem still exists.:@ this is on a 07 w900 its really starting to bug the S%^T out of me....I'm just missing something that needs to be cleaned up(plug?) but have not found it. and maybe someone knows this one.