Volvo S40 The S40 is Volvo's most affordable sedan with all the amenities of a luxury sports car.

P0128 Coolant Temp Below Thermostat Regulating Temp, help in diagnosing this code

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Old Oct 18, 2011 | 06:17 PM
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aldavjr's Avatar
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Default P0128 Coolant Temp Below Thermostat Regulating Temp, help in diagnosing this code

I have a 2000 S40 and this code came up when I scanned it. Any ideas what the code means? Where do I start? Thanks.
 
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Old Oct 18, 2011 | 08:57 PM
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Bad thermostat. Just replace it, erase the code, and off you go.
 
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