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Code

P0400

Emissions / EGR

خلل تدفق EGR

تدفق EGR غير مطابق.

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Most likely causes

صمام مسدود
قنوات مسدودة

Symptoms you may notice

Check engine light
Rough idle
Spark knock

Checks to run

Inspect the EGR valve
Clean passages
Test the valve

Tools you may need

Socket set EGR cleaner

Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Emissions / EGR

تدفق EGR غير كافٍ

خلل دائرة صمام EGR

إشارة حساس موضع EGR منخفضة

صمام EGR — مدى / أداء

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