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P0403

EGR Control Circuit

Medium
OBD-II egr
What it means

Fault in the EGR control circuit — wiring, connector, or valve solenoid.

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Related codes
SPN 411 / FMI 3

EGR Differential Pressure — Voltage High

egrMedium
 SPN 412 / FMI 0

EGR Temperature — Above Normal (Most Severe)

egrHigh
 P0401

EGR Flow Insufficient Detected

egrMedium
 P0402

EGR Flow Excessive Detected

egrMedium

General reference only — always confirm against the OEM procedure for your specific engine.