What does code P1477 mean on Dodge vehicles?
The secondary air injection system supplies excessive airflow.
OBD-II Code Dodge
P1477 — Dodge — Too Much Secondary Air
The secondary air injection system supplies excessive airflow.
Common symptoms
- Unstable idle
- increased emissions
Possible causes
- Stuck diverter valve
Initial recommendation
Check secondary air diverter valve.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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