Rhys A4 3.0 Posted February 21, 2017 Share Posted February 21, 2017 Hi have had a fault code come on and it is p0491 and p0492 , I no that it secondary air system but dose anyone know how to sort it ???? Cheers Rhys Quote Link to comment Share on other sites More sharing options...
Trevor Posted February 22, 2017 Share Posted February 22, 2017 It suggests intake air leak....have you had any work carried out on the car recently? Quote Link to comment Share on other sites More sharing options...
Rhys A4 3.0 Posted March 3, 2017 Author Share Posted March 3, 2017 I had some pipes replaced not sure but think they was to do with air intake Quote Link to comment Share on other sites More sharing options...
Trevor Posted March 6, 2017 Share Posted March 6, 2017 That's where I would start looking then....just in case one wasn't quite on enough or missing a clip, etc Quote Link to comment Share on other sites More sharing options...
Rhys A4 3.0 Posted March 6, 2017 Author Share Posted March 6, 2017 Ok cheers I'll check that out Quote Link to comment Share on other sites More sharing options...
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