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P0128 Diagnostic Trouble Code Discussion for December 2006

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2003 Volvo S80 2.9 2.9L No Start, MIL Lamp on VIN: YV1TS92D13
P0128: Coolant Thermostat. The customer states while driving the speedometer & tachometer both go to zero while still running and moving and CEL comes on steady. After the vehicle is eventually shut off it will not restart for sometimes hours. When it finally starts it acts as thoug...
December 04, 2006