P0491 The Key to Unlocking Performance Excellence

P0491 Secondary Air Injection System Insufficient Flow. Stumped. My VW CC 2010 is having a check engine light with the code P0491 which ... The car will need to be in closed loop or hot for the 02 sensors to read the air input correctly. Cold is a relative term. The engine coolant temperature needs to be under 104F/40C otherwise the SAP pump WILL NOT be commanded on. If you have ... It soon turns out quite obviously to be a disconnected hose. The hose connects the SAI pump outlet to the Combi valve. Below pictures show the problem and ... Error code P0491 which to my understanding is related to the secondary air injection system on bank 1(whatever it means, I guess cylinder 1) Both of these codes are pointing towards a defective valve. Tests/Procedures:1. This system uses a pressure sensor to monitor secondary Air Flow from the AIR ... The OBD-II fault code P0491 means that the Secondary Air Injection System is not providing enough airflow into the exhaust system during ... The dual codes indicate a system failure. A system failure can be due to one of the following: 1) Air pump failure - This is a fairly common ... Find out everything about the P0491 fault code In this video, we will explore the description, symptoms, causes, and solutions to resolve ... I have Codes P0491 and P0492 coming up for my 04 V8. Now I know that both are for the secondary air system bank 1 and 2 but how do I pin point the problem my ...