P0400 Code – Exhaust Gas Recirculation Flow Malfunction

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Code P0400 Possible Causes
Faulty EGR temperature sensor and circuit
Faulty EGR Valve
Faulty Exhaust Gas Recirculation EGR volume control solenoid valve
Dead Weak battery
EGR passage clogged
EGR solenoid valve circuit poor electrical connection
EGR solenoid valve harness is open or shorted
Exhaust gas leaks
Faulty EGR solenoid valve

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