What does code P1407 mean on Mazda vehicles?
The ECU detects no exhaust gas recirculation flow when EGR operation is commanded.
OBD-II Code Mazda
P1407 — Mazda — No EGR Flow Detected
The ECU detects no exhaust gas recirculation flow when EGR operation is commanded.
Common symptoms
- Increased emissions
- check engine light
Possible causes
- Blocked EGR passages
- faulty EGR valve
Initial recommendation
Clean EGR passages and inspect EGR valve operation.
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.
Analyze this code with MecaOBD
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