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U1301 + Po087 codes setting

3K views 0 replies 1 participant last post by  boothybunch 
#1 ·
Hello, I wonder if any one out there can answer a question for me.

I am over here in the USA and my father is back in the UK driving my 2006 LBZ silverado. The engine management light has come on and gone in to limp mode. it has a banks boss hoss kit installed currently set at level 2 (not gone any higher yet)

He has put the Power pda on the cradle and codes U1301 and po087 has come up.

I got po087 a few months ago, i changed out the fuel filter, cleared code and no more problems till now. I did find out yesterday he took the truck out for a high speed run one night and had the speedo pegged out and still going ( 125 mph +)

Can anyone suggest what could cause the U1301 as nothing has been changed electrically yet on the truck apart from the Banks tuner (which was plug and play)
 
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