P0411moderate severityPowertrain
Secondary Air Injection System Incorrect Flow Detected
on 2001 Dodge Caravan 3.3L V6 · FWD
What this code means
The secondary air injection system is not providing the expected airflow.
Symptoms
- Check Engine Light
- Failed emissions test
Common causes
- Blocked AIR passages
- Stuck check valve
- Weak AIR pump
- Exhaust leak allowing backflow
Diagnostic steps
- Monitor O2 sensor during AIR pump activation (should go lean)
- Check AIR pump output
- Inspect check valve
- Check for blocked passages
Repair notes
Clear blockage or replace AIR pump/check valve.
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1