P0411

P0411 00

Secondary Air Injection System. Incorrect Airflow.







Fault symptom
- Check Engine

On-board diagnosis

Type of diagnosis:
- Once per driving cycle.

Enable criteria:
- Battery voltage must be between 11 - 16 V.
- Atmospheric pressure below 725 kPa (105 PSI).
- Coolant temperature higher than -6 degree C (21 degree F).
- Engine load between 120 - 400 mg/c.
- Engine speed between 700 - 2500 rpm.
- Secondary air injection pump is active.
- No DTC detected for oxygen sensors 1 and 2.
- No DTC detected for the mass air flow sensor.

Fault criteria:
- Closed loop insufficiently actuated or not at all.

Dependent:
- None

System reaction to a fault:
- None

OK report:
- Diagnostics carried out without fault reported.

Fault handling:
Type III
(See section Fault handling III, "Other emission-related components and functions" for more information.)

Checking the wiring harness
- Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:
- Insufficient air flow to the exhaust system when secondary air injection pump is active.

Functions in the diagnostic tool related to the fault:

Activation:
- Initiate SAI Diagnosis
- SAI Relay
(See also description of readings/activations in diagnostic tool)