Year of Manufacture *: 2006
( Optional ) Engine Code or CC: 906.233
fault codes on system are 43co n30/4esp control unit- the supply voltage is too low
43a0 component return pump is blocked or stiff
the second code came on after I tried to work it off the scanner (which is snap on verdict)
problem I have is that I cant find any info or wiring digrams to help me find fault. was told that side light not working or brake lights not working can cause problem but they are all working fine.
any information would very much appreciated
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