Unlock the Secrets of P0491 Empowering You with Solutions

Get P0491 OBD-II code: Secondary air injection system insufficient flow. Know common triggers, repairs needed, and find RepairPal certified shops for ... S4 (B8 Platform) Discussion - P0491 & P0492 Secondary Air Injection System Insufficient Flow - I have these two codes that I can't get rid ... The P0491 code indicates a fault with the system, typically indicating that the secondary air flow is too low on bank 1. Bank #1 refers to the side of the ... I bought this for my 2003 E46 BMW 325xi to fix the check engine light for code P0491 and P0492 which showed an error on the secondary air injection. Diagnose ... SEL: P0491 Secondary Air Injection System Insufficient Flow General BMW Z4 Forum. If you're seeing this code, it means the powertrain control module (PCM) has identified that the SAI system is dealing with insufficient flow. Bank 1 is the drivers side, check the fuses for the secondary air injection pumps. There are two 40a maxi fuses located in the underhood fuse ... Secondary air injection is an emissions component on PZEV models that isn't related to engine operation - MAF not related at all. Electric air ... I got the following two codes: The first one (store trouble codes) P0491 (secondary air injection system insufficient flow bank 1) I did ... This is a known issue with the 3.0T. It's emissions an emissions issue, no damage to your car will happen while driving with the CEL.