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P0411

Overview

Code

P0411

Code Type

P

Code Class

P0

System

Engine, Emissions

Severity Level

Low

Emissions Related

true

Drivability Impact

None

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0411 indicates incorrect airflow detected in the secondary air injection system

Symptoms

Check Engine Light illuminated

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Secondary air injection airflow monitoring and emissions control

Possible Causes

Faulty air pump; Check valve failure; Air leak

Diagnostic Steps

1 Inspect air pump and check valves; 2 Verify airflow with scan tool; 3 Repair leaks or replace faulty components

Drive Safety Notes

Driving is safe but emissions may be affected

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