Rhys A4 3.0 Posted February 21, 2017 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
Audi Owners Club. Posted February 22, 2017 Posted February 22, 2017 It suggests intake air leak....have you had any work carried out on the car recently?
Rhys A4 3.0 Posted March 3, 2017 Author Posted March 3, 2017 I had some pipes replaced not sure but think they was to do with air intake
Audi Owners Club. Posted March 6, 2017 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
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