P0491 The Ultimate Resource for Emissions System Diagnostics and Repair

It was running like a dream, but recently threw a code. P0491. I checked the code and it's the secondary air Injection. I have had the hardest ... Since this just started after replacing your head lights and the secondary air pump is usually located behind or just under one of the head ... HELP: ODBC!! code P0491 - Secondary Air Injection System ... Have 2006 987 Boxster Base 2.7. Got the Check Engine Light a few days ago and when I ... P0491 and P0410 Codes Secondary Air Injection System ... Background on the car... 2007 Fusion w/ roughly 54k on the clock....no issues with the ... Secondary AIR Diag VW Jetta P0491 part #1 part #2 https://youtu.be/GtQySXD7yPA?si=vWP3gwqqnzGvDV1i more diag tips for this problem before ... If these valves can't open, there won't be any flow into the engine from the secondary air injection pump and the insufficient flow codes are ... My '07 Cayman presented engine codes P0491 and P0492 which are associated with the secondary air system. What is Trouble Code P0491? OBD II Trouble Code P0491 indicates trouble with the Secondary Air Injection System. The components which make up the Air Injection ... 2017 coupe. Runs fine and set this code yesterday. Know it is secondary air pump system failure. Only 15k on this car. My 2016 got flooded and totoled. The secondary air injection system utilizes ambient air, injecting it into the exhaust, thereby diluting the mixture and facilitating lower emissions ...