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P0128 Diagnostic Trouble Code Discussion for August 2006

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2003 Hyundai Accent GL 1.6L MIL Lamp on VIN: KMHCF35C83
P0128: Coolant Thermostat. Hello fellow techs. This vehicle has been to the dealer numerous times and now it's my turn. Vehicle intermittently sets code PO128 ( coolant temperature below thermostat regulating temperature ). I have checked the thermostat, cooling fans, engine running tem...
August 04, 2006