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Ck engine lt on. p0128? - 2003 Chevrolet TrailBlazer

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P0128 is coolant tempurature below thermostat regulating tempurature, the most likely problem is to replace thermostat. also be sure coolant is at proper level. if still problems, replace coolant tempurature sensor.

Posted on Mar 25, 2011

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Posted on Jan 02, 2017

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Where is the thermostat located on my 2006 Saturn ion 2.2L?


Under the thermostat housing mounted on the engine at the "engine side" of the upper radiator hose. That "usually" happens when the thermos is stuck open & the computer is getting cool readings from the anti freeze because its flowing too freely. More fuel is added due to bad temp readings. Drain some coolant, remove rad cap, remove thermos housing, Clean gasket or r/r O ring & replace thermostat. Reinstall. Refill cooling system, let it run.refill overflow bottle after warmed up. Ck for heat & leaks. Good luck

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What does error code p0128 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

Read more at: http://www.obd-codes.com/p0128
Copyright © OBD-Codes.com

Feb 04, 2015 | Cars & Trucks

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2003 trailblazer ext obc test doesnt register


Its an OBD connector.

Check the CIGAR fuse in the under hood fuse block.

Its probably the thermostat. P0128 code?

Apr 02, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

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

Ck engine lite on.p0128?


coolant thermostat (temperature below thermostat regulating temperatur)

Mar 25, 2011 | 2001 BMW 325

1 Answer

Ck engine light come on had it ck show code 128


P0128 is a temperature error code indicating: ECT Sensor Below Thermostat Regulating Temperature

Possible causes are:

  1. Check the operation of the thermostat (it may be stuck open)
  2. Coolant level is too low, or the coolant mixture is incorrect
  3. ECT sensor signal circuit has a high resistance condition
  4. ECT sensor is damaged or it has failed
In most cases, assuming the coolant level is full, changing the thermostat will correct your problem.
Thank you for using Fixya!

Mar 24, 2011 | 2005 Chevrolet TrailBlazer

3 Answers

What can keep causing Check engine code P0128


CODE P0128- THERMOSTAT MALFUNCTION. POSSIBLE CAUSES 1. ECT SENSOR IS OUT OF CALIBRATION. 2. CHECK THE OPERATION OF THE THERMOSTAT IT MAY BE STUCK OPEN.3.INSPECT FOR LOW COOLANT LEVEL OR FOR AN INCORRECT COOLANT MIXTURE.

Jan 06, 2010 | 2004 Kia Spectra

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P0172 and P0128 Error Code 2003 Trailblazer 4WD


PO172 means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). I would replace the thermostat first. The computer could be injecting too much fuel because it thinks it never gets to operating temperature. That may keep the light off.

Jan 28, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

Cobalt Engine


did you ck the oil if its full its probly a shield hitting aginst fly wheel need to have somone ck out

Nov 27, 2008 | 2007 Chevrolet Cobalt Coupe

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