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#1
01-09-2010, 07:31 PM
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Dtc p0128
Yesterday while driving on the highway the MIL light came up. I didn't notice any drivability problems or issues and performance has not changed at all.
I connected my ELM to read the DTC codes and this code P0128 - Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature) came up! What are the causes, diagnostics and fixes to rid my self of this code? Thanks in advance.
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---------------------------------------------- Current Rides: 2018 Honda Pilot EX-L - 3.5L V6 -{|}- 2004 Toyota Matrix XR 4WD 1.8 I4 ________________________________________ Past Rides: 2000 Ford Windstar LX - 3.8L V6 SFI - {|} - 2003 Ford Expedition XLT - 4.6L V8 SFI 2005 Chevrolet Malibu LS - 3.5L V6 SFI - {|} - 1991 Chevrolet Corsica LT - 3.1L V6 MFI 1995 Dodge Grand Caravan SE - 3.3L V6 MFI - {|} - 1980 Ford Mustang - 3.3L L6 1BBL ---------------------------------------------- 
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#2
01-09-2010, 07:53 PM
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Re: Dtc p0128
It's taking too long for the engine to warm up, the coolant thermostat is probably sticking open. The engine has a window of time to get warm, if not a code is thrown.
1) New thermostat ; Reset clear code
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#3
01-11-2010, 01:00 AM
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Re: Dtc p0128
Thanks for the info... appreciate your help! As soon as it starts warming up again, I'll look into it.
__________________
---------------------------------------------- Current Rides: 2018 Honda Pilot EX-L - 3.5L V6 -{|}- 2004 Toyota Matrix XR 4WD 1.8 I4 ________________________________________ Past Rides: 2000 Ford Windstar LX - 3.8L V6 SFI - {|} - 2003 Ford Expedition XLT - 4.6L V8 SFI 2005 Chevrolet Malibu LS - 3.5L V6 SFI - {|} - 1991 Chevrolet Corsica LT - 3.1L V6 MFI 1995 Dodge Grand Caravan SE - 3.3L V6 MFI - {|} - 1980 Ford Mustang - 3.3L L6 1BBL ----------------------------------------------
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