P0411 Secondary air injection incorrect flow
- System
- Powertrain - engine and transmission
What P0411 means
"Secondary air injection system incorrect flow detected" is about the system that pushes extra air into the exhaust while the engine is cold, and about a flow measurement that did not match what was expected during that test. The name says the flow was incorrect without saying which way, which is what P0412 onward specify.
This is a standard code. It means the same thing on every make of vehicle.
What the program shows for P0411
The Full scan's on-board self-tests report the secondary air result against the car's own limits, and the Inspection screen says whether the secondary air injection monitor has completed. Because this test runs on a cold engine, Coolant temp on the Dashboard is the reading that says whether the car is in the state where it could run at all.
The Dashboard shows Commanded EGR, EGR error, Evap purge, Catalyst temp, O2 sensor (rear), Fuel level and Coolant temp. The Full scan's On-board self-tests list the Catalyst bank, EGR / VVT bank, EVAP leak, EVAP purge flow, EVAP purge valve and Secondary air results as PASS, FAIL or NO RESULT against the car's own limits, and the Inspection screen shows whether the Catalytic converter, Fuel vapour system, Exhaust gas recirculation and Secondary air injection monitors are done or still running. Clear codes warns that clearing resets those monitors.
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