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P0128 Diagnostic Trouble Code Discussion for February 2006

Thermostat System Malfunction

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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2001 Chevrolet Express 2500 4.3L hard start VIN: 1GCFG25W51
P0128: Engine Temperature Below Thermostat Regulating Temperature. Hey guys, the main complaint is hard starting. I verified this and the engine does not crank smoothly. When cranking and a cylinder fires, the engine jerks to a stop momentarity as if the firing is out of order, just like an engine trying to start with the plu...
February 27, 2006