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P0128 Diagnostic Trouble Code Discussion for March 2012

Thermostat System Malfunction


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Trouble Ticket Help Requests for DTC P0128
Help Request Posted
2002 Mazda MPV ES 3.0L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: JM3LW28A42
P0128: Thermostat Malfunction. Greeting Techs, This MPV has me baffled. It came in on the hook. It barely starts and when it does kick in a plum of smoke comes out the tail pipe (unburned fuel). Once started it idles at about 1200 rpm, if you give it gas it bogs down and will stall unless y...
March 08, 2012