Citroen Nemo 1.4 HDI 2009

[Philaz]

Good afternoon, new to this forum and hoping someone can help me. I have Citroen Nemo 1.4 HDI 2009 and since annual service last November have engine check light but alway different fault codes. Started with P0193, P1162 and more recently P0069, P0113 and now P0237. EGR valve and Fuel PX and MAP sensor replaced however P0237 persistent. It's logical to assume that all FC's are related to a common point. Internet search points to ECU ground splice corrosion under the battery tray but nothing really specific found about this. Also references to a Citroen Technical Service Bulletin but nothing found. Grateful if anyone with similar experience could share findings and location of the ground splice and common 5V sensor splice. Many thanks

[mickthemaverick]

If you can PM me your Chassis number I will see if I can find an earthing diagram for you

[mickthemaverick]

Ok here are the files showing the harnesses and the earth points. I'm not sure it will help too much but at least you'll know where to look. Good luck.

Nemo earths.pdf

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harnesses.pdf

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[PaulC5]

What was done in the service that might have disturbed something such as wiring ?

[Philaz]

Many thanks however not much detail shown on the drawings