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Motor Control Failure Update

839 views 2 replies 2 participants last post by  156Chris 
#1 ·
My prob so far.

2.0 JTS (Alfa GT)

Motor Control system failure came on just after startup and continues to stay on.

Took it to Alfa specialist - ran diagnostic test - mixture lean fault - suspect lambda.

Lambda sensors have previously been hardwired and soldered (common mod I believe).

Garage reset the fault but the light came back on shortly after.

I have checked the solder connections and found one detached (soldering done by a monkey by the way). I have resoldered the connection and insulated it properly.

I have tried resetting the ecu but fault still apparent - will it need another fault reset via OBD2 connection? I have a cable on its way to me (elm327) and will use Fiatscan.

I was wondering if it was a dodgy connector then the fault would clear itself? Would an ECU reset clear this kind of fault?

Any advice would be really helpful guys (and gals).
 
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#3 ·
Is it not worth changing the lambda sensors???
 
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