Troubleshooting P0411 The Essential Guide for Success

The AIR pump flow check monitors the HO2S signal at idle to determine if secondary air is being delivered into the exhaust system. You might want to check for a vacuum leak around the intake manifold, clean your mass air flow sensor and electric throttle unit, check for ... The secondary air injection system does not detect the presence of air in the exhaust when introduced by the secondary air injection system. You appear to have a PZEV car. That's a PZEV secondary air fault code. It could be covered by the emissions warranty.......why not check with a ... We show you info about the secondary air system and components on VW 2.5L 5 Cylinder engines. Troubleshoot your vehicle's P0411 code for Secondary Air Injection System Incorrect Flow Detected with our expert advice and solutions. P0411 indicates that the ECU has detected the flow from the secondary air injection system to be out-of-specification. The secondary air injector is the leaf blower on the passenger side engine. The motor goes out usually because the relay is junk and gets stuck closed. P0411 (Secondary air injection incorrect upstream flow detected). I have reset the light twice and it will stay off until the truck sits for 6+ hours then it ... P0411 Detects an insufficient flow condition. This test is run during Phase 1 (AIR pump commanded On, Valve commanded Open) Leaks downstream of the valve are ...