Question about Oldsmobile Intrigue

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I have a po128 trouble code in my car it says coolant thermostat, coolant temperature below thermostat regulating temperature, what is the fix for this.2002olds intrigue 3.5l

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  • Regal Lace Dec 12, 2009

    yes it was helpful thank you very much

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  • Oldsmobile Master
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Sounds like its not running hot enough,so a new thermostat or the sensor that reads it needs changing ,if your in a cold weather area try putting some cardboard in front of the rad to reduce the airflow therefore raising the engine temperature

Posted on Dec 12, 2009

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2004 trailblazer code po128


P0128:
P0128 OBD-II Trouble Code
Technical DescriptionCoolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

What does that mean?This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125

In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.

CausesA code P0128 may mean that one or more of the following has happened:

Low engine coolant level .
Leaking or stuck open thermostat .
Faulty cooling fan (running too much) .
Faulty coolant temperature (ECT) sensor.
Faulty intake air temperature (IAT) sensor .Here's a link on replacing your thermostat.

Feb 06, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

What does po128 code mean in english. thanks


P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature

Jan 24, 2013 | 2000 Acura TL

1 Answer

Po128 how to cure the problem code


Trouble Code: P0128

Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

Possible Causes:


Insufficient warm-up time.Low engine coolant level.Leaking or stuck open thermostat.Inoperative engine coolant temperature sensor.Inoperative cylinder head temperature sensor.Here are the reasons.

Jan 14, 2013 | 2003 Ford Explorer

1 Answer

Po401


Trouble Code: P0128

ECT Sensor Below Thermostat Regulating Temperature

Possible Causes:


Check the operation of the thermostat (it may be stuck open).Coolant level is too low, or the coolant mixture is incorrect.ECT sensor signal circuit has a high resistance condition.ECT sensor is damaged or it has failed.Trouble Code: P0401

Insufficient EGR Flow Detected

Possible Causes:


Base engine problem (e.g., a severely restricted exhaust).EGR vacuum hoses damaged, loose or routed incorrectly.EGR passages or intake passages clogged or restricted.EGR solenoid valve is clogged (carbon), damaged or has failed.TSB 87-65-22 contains a repair procedure for this code.

Dec 29, 2012 | 2005 Chevrolet Impala

1 Answer

Po128 po131 po300 po463


P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0463 Fuel Level Sensor Circuit High input

obd2 code scanner

Aug 16, 2012 | 2000 Buick LeSabre

4 Answers

Po128 is the code. What's the problem


Well, I can't give you any specific information regarding your vehicle because you forgot to mention what kind of vehicle you have. (This is kinda important if you really want some help figuring out what is wrong with your car)

The "Generic OBD" of code P0128 is "Coolant Temperature Below Thermostat Regulating Temperature"

The most likely cause is a stuck-open thermostat, however, I have also seen defective Engine Coolant Temperature (ECT) sensors also cause this code.

Jun 13, 2011 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

Sensor keep coming in for code PO128 - insofficient ambient temp was does this mean how can i fix it


DTC P0128: Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature
Do you have any issues with heat in the vehicle? If so the thermostat may need replaced If not the engine coolant temperature sensor is most likely reading incorrectly due to a bad sensor or connection to the sensor.

Dec 01, 2010 | 2008 Chevrolet Cobalt

1 Answer

Code PO128 came up on my 2005 Explorer. Any ideas on how to correct the problem?


P0128 - Coolant Thermostat (coolant Temp Below Thermostat Regulating Temperature). First check the coolant level,if its low then refill the coolant.If the coolant is checked full then get the thermostat replaced.-----------That's it.

Nov 18, 2010 | Ford Explorer Cars & Trucks

1 Answer

My 2003 chevrolet giving a code p0128


CODE PO128 - ECT SENSOR BELOW THERMOSTAT REGULATING TEMPERATURE CONDITIONS. CHECK THE OPERATION OF THE THERMOSTAT IT MAY BE STUCK OPEN.ECT SENSOR HAS FAILED.CHECK FOR LOW COOLANT LEVEL OR INCORRECT COOLANT MIXTURE.- ECT SENSOR IS THE ENGINE COOLANT TEMPERATURE SENSOR.

Oct 21, 2010 | Chevrolet TrailBlazer Cars & Trucks

1 Answer

My check engine light is on and I can't pass inspection because of this problem. The code that appears is po128. What exactly does that mean?


The generic code stands for Coolant Thermostat (the Coolant Temperature is below the thermostat regulating temperature) Need to replace thermostat according to that it is opening too soon.

May 06, 2010 | 2004 GMC Envoy

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