P0128 Diagnostic Trouble Code Discussion for September 2012
Thermostat System Malfunction
Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.Trouble Ticket Help Requests for DTC P0128
| Help Request | Posted | |
| 2006 Hummer H3 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5GTDN13636 P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. I am having trouble finding a definitive answer to why this vehicle has a misfire on cyl #2 at an idle. The code I have is for a random misfire but watching it on the modis shows cyl #2 missing all the time at an idle. I swapped the ignition coils, swapped the... |
September 28, 2012 | |
| 2006 Hummer H3 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5GTDN13636 P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature. I am having trouble finding a definitive answer to why this vehicle has a misfire on cyl #2 at an idle. The code I have is for a random misfire but watching it on the modis shows cyl #2 missing all the time at an idle. I swapped the ignition coils, swapped the... |
September 29, 2012 |
