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DTC P0404Diagnostic Instructions
DTC DescriptorsDTC P0404 03: Exhaust Gas Recirculation (EGR) Control Circuit Low VoltageDTC P0404 0B: Exhaust Gas Recirculation (EGR) Control Circuit High Current DTC P0404 51: Exhaust Gas Recirculation (EGR) Control Circuit Malfunction DTC P0404 52: Exhaust Gas Recirculation (EGR) Control Circuit Malfunction DTC P0404 55: Exhaust Gas Recirculation (EGR) Control Circuit Too Few Transitions DTC P0404 56: Exhaust Gas Recirculation (EGR) Control Circuit Too Many Transitions DTC P0404 59: Exhaust Gas Recirculation (EGR) Control Circuit Protection Time-Out DTC P0404 5A: Exhaust Gas Recirculation (EGR) Control Circuit Not Plausible DTC P0404 5B: Exhaust Gas Recirculation (EGR) Control Circuit Malfunction Diagnostic Fault Information
Circuit/System DescriptionThe exhaust gas recirculation (EGR) valve is controlled by the engine control module (ECM) through the EGR solenoid. A reference voltage is supplied to the EGR valve solenoid. The ECM controls the solenoid by grounding the control circuit. Conditions for Running the DTC
Conditions for Setting the DTCP0404 03The voltage is below the calibrated value. P0404 0BThe ECM detects a high current on the output power stage. P0404 51, P0404 52, P0404 5A or P0404 5BThe ECM detects a positive or negative deviation of the EGR valve. P0404 55The ECM detects a permanent negative governor deviation. P0404 56The ECM detects a permanent positive governor deviation. P0404 59The ECM detects a short circuit over load error. Action Taken When the DTC SetsDTC P0404 is a Type B DTC. Conditions for Clearing the DTCDTC P0404 is a Type B DTC. Reference InformationSchematic ReferenceConnector End View ReferenceElectrical Information ReferenceDTC Type ReferencePowertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool ReferenceControl Module References for scan tool information Circuit/System Verification
Circuit/System Testing
Repair InstructionsPerform the Diagnostic Repair Verification after completing the diagnostic procedure.
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