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2002 Buick engine code PO128 - 2002 Buick Century

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ECT engine coolent tempature sensor in the water jacket frint of engine near top radiator hose

Posted on Nov 14, 2010

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Posted on Jan 02, 2017

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SOURCE: 2002 buick lesabre check engine light on. need a

It would be better if you got the codes read and then post back with the code.There are numerous codes that can cause the check engine light to go on.Auto Zone will do this for free.There are a few other parts stores that do this for free also.Hope this helps.Good luck.

Posted on Mar 15, 2010

steve_e_uk
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SOURCE: 2002 Blazer, 4.3L engine, Code PO128. Is it the

hi this is showing that the thermostat is u/s it is stuck open, hope this helps

Posted on Nov 04, 2010

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SOURCE: po128 code on 2002 kia rio

it mite be a o2 cencer

Posted on Nov 24, 2011

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Pontiac grand am I had a diagnostic reading at autozone for diagnostic codes po128,po440 and p1189 don't know what they mean for a 2003 Pontiac grand am gt 3.4 liter and v6 engine vehical


PO128 -- engine coolant low or thermostat not working
P0440 - EVAP system malfunction, gas cap loose - Cat convertors missing from car can cause this
P1189 - Engine Oil Pressure Switch Circuit -- CAT CONVERTORS MISSING FROM CAR can cause this.

Jan 28, 2015 | 2003 Pontiac Grand Am

1 Answer

2004 buick rainer, po128 pending has heat the check engine light comes on and goes out temp is 195


PO 128 is a coolant temperature beyond threshold code. It means your thermostat is stuck and needs to be replaced.

Dec 29, 2014 | Buick Cars & Trucks

1 Answer

Po128


what was the error says when you get the code or look it up online code po128

Jul 07, 2014 | 2001 Buick LeSabre

1 Answer

Code PO128 CHEVY EQUINOX


Code 128 is for the engine not warming up to normal temp.
Usual problem is a faulty thermostat.

Jan 26, 2013 | Cars & Trucks

1 Answer

Need engine diogram for 2007 buick lacross 3800 , po128 (ect)


The code is telling you the engine temp sensor is telling the computer the engine is not warming up as it should.
Sometimes the problem is the thermostat, or low coolant, and sometimes it is the temp sensor.
Check the engine temp with an inferred thermometer first.
Usually the engine temp sensor is a two wire sensor, yellow and black.

Sep 03, 2012 | 2007 Buick LaCrosse CXL

1 Answer

Po128 code on 2002 kia rio


it mite be a o2 cencer

Nov 24, 2011 | 2002 Kia Rio

1 Answer

2002 Blazer, 4.3L engine, Code PO128. Is it the thermostat or thermostat sensor? Thanks in advance, Dennis


hi this is showing that the thermostat is u/s it is stuck open, hope this helps

Nov 04, 2010 | 2002 Chevrolet Blazer

1 Answer

What could cause code PO128 to come up on a 2002 Chevy Trailblazer


Sounds like the thermostat may be stuck open or has anyone put a colder thermostat in the car,because once it starts to get cold it will throw a SES with a colder then stock thermostat.

Code PO128; coolant temp below thermostat regulating temp. Replace the thermostat and that should address your issue.

Thank you for using fixya and good uck

Sep 01, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Check engine light is on. error reads PO128 and


hi 128 is coolant temp below regulating temp 405 is










hi 128 is coolant temp is below regulting temp 405 is































































































































hi 128 is coolant is below regulating temp 405 is<erg/swsr/ckt low> hope this helps please rate this answer












Nov 20, 2009 | 2002 Saturn L-Series

1 Answer

Po128 code on 2001 corvette


replace the thermostat. computer sees engine is running too cool thermostat stuck open.

Nov 10, 2008 | 2001 Chevrolet Corvette

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