P0128 Diagnostic Trouble Code Discussion for June 2006
Thermostat System Malfunction
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| Help Request | Posted | |
| 2000 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K5Y P0128: coolant temp below threshold. Hi Guys! I have had this vehicle into my shop occasionally and have seen a stored DTC PO128 for cooling system temp below threshold value. Since the complaint seemed to be intermittant I replaced the thermostat and gasket first trip in. Next trip (still interm... |
June 29, 2006 |
