WebJan 14, 2024 · Originally Posted by TheKenR Well the PCM will set the 0491/0492 codes based on what the O2 sensors see. So if there is a link then perhaps the faulty PCV valve is changing the exhaust mixture on the passenger side bank and the PCM mistakenly thinks the SAI system is not flowing properly? Only a guess because I don't know how the PCV is … http://forums.pelicanparts.com/porsche-cayenne-macan-forum/1098714-code-p0491-p0492.html
Code P0491 and P0492 ???? - Pelican Parts Forums
WebHello all, I have a 04 cayenne 3.2 base model, I have a P0491 and a P0492 code, and when I google it up, it only shows the V8 or the twin turbo model, any help would be appreciated, … WebSep 27, 2024 · Recently my '07 Cayman presented engine codes P0491 and P0492 which are associated with the secondary air system. After researching the issue I resolved to test … chung attorney
P0491 Secondary Air Injection System Insufficient Flow Bank 1
WebJul 29, 2007 · I recently installed K&N's FIPK (PN 63-7000) in my car and just passed 250 since the install and in the last 5 days I've had the check engine light come on with two fault codes (P0491 and P0492), which is Secondary Air Bank 1&2. I cleared the codes the first time and 5 days later it came back. WebThe P0491 code tell there is a fault with the system – usually that the secondary air flow is too low on bank 1. Bank #1 is the side of the engine with cylinder #1. For bank #2, see … WebJul 10, 2010 · See pages 6 and 7 of this newsletter pdf: What follows is the abbreviated version of the diagnostic procedure that pertained to my specific case. Refer to the above-mentioned link for the complete protocol. Step # 1: rule out the pump. Easy, mine works like a beast. Step # 2: rule out the check valve. chung breath