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P0128 Diagnostic Trouble Code Discussion for September 2007

Thermostat System Malfunction


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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2000 Subaru Legacy GT 2.5L MIL Lamp on VIN: 4S3BE6459Y
P0128: thermostat temp too cold too long. there seems to be very little info on this code. the last freeze frame, code set at 60 mph at a coolant temp of 160 deg.any info would be great.i think the peramiters are too tight on this code possible reflash ??
September 13, 2007
2000 Subaru Legacy GT 2.5L MIL Lamp on VIN: 4S3BE6459Y
P0128: thermostat temp too cold too long. there seems to be very little info on this code. the last freeze frame, code set at 60 mph at a coolant temp of 160 deg.any info would be great.i think the peramiters are too tight on this code possible reflash ??
September 13, 2007