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Home >> Lexus >> 2017 >> GX 460 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes) (3 Of 7) >> SFI System >> DTC P0403: Exhaust Gas Recirculation Control Circuit [08/2015 - 08/2022] >> Monitor Description

Monitor Description

This DTC is designed to detect an open or short in the EGR valve circuit.

If the EGR terminal voltage is low when the EGR terminal output is off, the ECM determines that the EGR valve circuit is malfunctioning.