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Looking for some help, multiecuscan states the following error code :p0130 , Lambda 1 signal above Cat. (No signal).

I am assuming this error refers to the manifold Lambda's (I may be wrong).

My question is which bank of cylinders does it refer to : front bank (4-5-6) or rear bank (1-2-3)

Oh forgot to mention engine type : 3.0 V6 24V CF3

Thanks in advance
 

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Disconnect one upper lambda.
Start engine and allow new 'fault' to be detected and switch off.
Look at fault. If the error code changes but remains as lambda 1, you've isolated it. Otherwise, it's the other one!
Reconnect lambda.
 
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