grayoallan Posted February 18, 2015 Report Share Posted February 18, 2015 Hi guys - any advice welcome here.As the title says, only does when cold. Scanner came up with front lambda fault which i then replaced with a known good genuine VW item.Car now runs better but engine light comes straight back on each time its turned off. It now shows a slightly different code to do with front lambda circuit?Are there any know places where the wiring loom has problems? Or maybe the ECU?Cheers Quote Link to comment Share on other sites More sharing options...
grayoallan Posted February 21, 2015 Author Report Share Posted February 21, 2015 Ok, so replying to my own post here; Spark plugs ok. HT lead resistance good. No sign of any coil pack damage & EGR valve cleaned. All just in case. Guess I need to start tracing that wiring loom back! Quote Link to comment Share on other sites More sharing options...
Danyutz Posted February 21, 2015 Report Share Posted February 21, 2015 Check the air filter box, any gunk from the breather pipe? Quote Link to comment Share on other sites More sharing options...
grayoallan Posted February 23, 2015 Author Report Share Posted February 23, 2015 Thanks, I'll have a look. But how would that cause a lambda circuit fault code? Quote Link to comment Share on other sites More sharing options...
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