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P0128 Diagnostic Trouble Code Discussion for January 2013

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2009 Ford F-150 XLT 4.6L MIL Lamp on VIN: 1FTRF12W29
P0128: coolant temp below thermostat regulating temperature. ... has been at another shop and had multiple NAPA thermostats put in it for a reoccuring P0128. When i got it, i decided to start with a Motorcraft thermostat rated at 194 degrees. The truck wont get over 177 degrees. I pinched off the heater hose and got tem...
January 16, 2013