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P0405 Diagnostic Trouble Code Discussion for July 2010

EGR Position Sensor Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P0405
Help Request Posted
1999 Saturn SL1 1.9L MIL Lamp on VIN: 1G8ZF528XX
P0405: EGR Valve Position Sensor Circuit low voltage. Customer may drive this car for days before it causes the light to come back on with these EGR faults. Voltage may be on the low side sitting in the shop but not this .04 volts and cannot duplicate this problem. Tried replacing valve twice using AC Delco parts...
July 06, 2010