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Obd code p0128 on 2004 chevy trailblazer?

We have had it serviced before and was told that the coolant level was low. Filled it and the light went off. Now it is back on.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: Coolant warning lights keeps coming on

Audi TT's only take G12 coolant (vw/audi propriatary formula) you can add some distilled water to the water level to prevent the light from coming on, but as you explained you keep adding fluid (of some kind) and the warning like returns. that's a little evident that you have a leak somewhere.

put some paper towels or something under your car when you park it for the evening. when you come out the next day, pull the car away from the spot and look at the paper towels. if they have orange drops, that's your G12 coolant leaking. like McMuff460 said, check all the clamps/hoses for signs of the leak. if you don't find anything i reccomend taking it to a shop for them to check out. Your water pump might be on it's way out.

Don't ever put any other fluid other than G12 coolant and distilled water into your car's coolant system. It will cause some major issues with seals, leaks, and cooling performance.

Posted on Nov 06, 2008

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davidkay61
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SOURCE: Service engine soon light - Diagnostic codes P1481, P1482

Read this. Fan.

Posted on Dec 18, 2008

motor1258
  • 6674 Answers

SOURCE: P0128 Code for a 2004 trailblazer with service engine soon light

Replacing it is the only fix. Sounds like it may be sticking open slightly.

Posted on May 27, 2009

  • 10 Answers

SOURCE: Electrical low-beam headlight wire on 02 Chevy Trailblazer burnt

Get yourself to a junkyard and pack yourself a light lunch while you're at it. Take a leisurely stroll through the junk that closely resembles the one you need parts for. Go to the closest wiring harness to the headlight assembly, take your time and don't go trying to **** it, and unplug it from the bulbs up front. Make a simple and straight forward swap and do take the time to stop and smell the junkers, it's quite relaxing! Then, you should seriously make sure your new wiring harness is properly grounded (!), which I suspect to have been a contribing factor to your problem of overheating the bulb socket. Do take the time to go over the stuff that should be grounded and make it so. Th e job is quite simple and well worth you taking the time to do it yourself.

Posted on May 27, 2009

  • 192 Answers

SOURCE: fan wont work fuses are fine coolant level was low i filled it up

I suspect you have a bad fan relay or temperature sensor. Here's a link to a page where you can see what these parts look like. The fan relay is usually located in the engine compartment inside a plastic box with a removable lid. It just plugs in and out. The temperature sensor will screw into your engine block and have a cable connected to it. Your owner's manual may give you their exact locations. http://www.diypartscatalog.com/ShopByVehicle.epc?q=2004-PONTIAC-Grand--Prix-V6--31ci--3.8l--F/i--Vin---Belts/hoses/cooling&yearid=2004%40%402004&makeid=67%40%40PONTIAC%40%40B&modelid=13463%40%40GRAND+PRIX&engineid=30226%40%40V6%2D231ci+3%2E8L+F%2FI+Vin+2%40%4030226&catid=2%40%40Belts%2FHoses%2FCooling&subcatid=36@@Sensors%2C+Switches+and+Relays&mode=PA

Posted on Jun 07, 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

My service engine soon lght is on in my 2004 chevy trailblazer LT. i went to take the care through marta this morning so i can renew my tags for my car. the man told me that the trouble sensors are P0014...


The P0014 code refers to one of your camshaft position sensors being out of time with the other. Does not mean its bad but it could be. The P0128 code refers to your engine running cooler than it should. Your coolant thermostat may be stuck open not letting the engine warm up to it's proper temp. Now you did not say which engine you have in the TrailBlazer. There are 2 different engine used in the year model. Please repost with that info.

Feb 01, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Check guages light keeps coming on when i am in park or have my foot on the breaks it is a 2002 chevy trailblazer.


I would check my oil pressure gauge and the oil level as well. the fuel level guage also malfunctions on those models so make sure it is working properly and not floating from full to empty that will cause the light to come on as well as overheating of the engine(low coolant levels)low oil level,low fuel level,and low charging volts from your alternator.if all is well suspect a short in dash.

Jan 21, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

I have a 2006 ford fusion, yesterday the check engine light came on as I was driving at highway speed...I went to auto zone and the code read as 128 "coolant temp is always low". The coolant...


the part store you went to can clear the code
however, being LOW in coolant will cause over temp
you concern is probably a defective thermostat or defective CHT

Nov 01, 2010 | 2006 Ford Fusion

1 Answer

2006 Chevy Trailblazer makes THUD when accelerating


Check your coolant level, low coolant or air in your cooling system will make a "thud"noise in your heater core when the engine is under load from acceleration. The coolant rushes in to the heater core where the air pocket is trapped and then your hear the noise.
Start with the simple and make sure your coolant level is correct and then try to purge the system to remove the air out for your coolant system.
Thank you for using fixya and good luck

Jun 15, 2010 | 2006 Chevrolet Trailblazer

1 Answer

My check engine light is on had the OBD checked and stated a temperature problem autozone suggested to check coolant level first then replace the temperature sensor where is it located?


I had the exact same problem on my 2003 Trailblazer. The check engine light came on, I took my vehicle to autozone and they told me the code was P0495 (cooling fan speed high)but they did't know how to fix the problem.
I called the dealer and they told me that it would cost me $89.00 to reprogram my PCM. I took my vehicle to the dealer and now my trailblazer is working like new. I hope it's that simple, the other thing also that could have gone bad would be the relay to your electric fan. The relay is a not like a normal relay but is more like a module that can regulate the speed of the electric fan which a tech2 scanner can determine if it's bad or not. Good luck
Thank you for using fixya.

Apr 22, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Chevy trailblazer check engine light


P0128 is coolant operating temperature operating too low. This can be contributed to the Thermostat stuck open or faulty electronic radiator fan clutch. This is common, I had the same issue and replaced the thermostat and fan clutch and had the clutch re-programmed (required) at the dealer. As for the P0410, check the air pump fuse, if blown it will set this code on. Also check the air pump hoses for water and cracks. Hopefully this helps!!

Apr 20, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

Code drive 5 . My 2004 trailblazer posted a code "drive 5". It showed the "reduced engine poweer" light, and would not respond to the accelerator pedal. I had been driving in slow traffic. I pulled over,...


Thottle body sensor, accelerator pedal sensor, restricted air flow...will all trigger this fault light. Go to your local Autozone, they will run an OBD scan for free, and explain the fault codes to you so the correct repairs can be made.
Good luck...i hope this helps, please rate me a fixya.

Jul 22, 2009 | 2004 Chevrolet TrailBlazer

2 Answers

Chevy Trailblazer Engine very loud when starting


sounds like it could be your intake manifold gasket

Apr 29, 2009 | 2003 Chevrolet TrailBlazer

1 Answer

2004 Chevy Trailblazer engine stalls after coolant temp senor R&R


clean your throttle body....same thing happened to me and my truck runs great now.

Mar 19, 2009 | 2004 Chevrolet TrailBlazer

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