Question about Chevrolet TrailBlazer

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02 trailblazer, im looking for the Engine coolant temperature sensor . i have the new sensor and want to replace it. Where is it?

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  • kazzam0054 Oct 03, 2009

    could you be a little more specific please. Im trying to find it as we speak. THANKS!!!

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In between two exhaust ports on the side of the engine that has the oil fill and pcv

Posted on Oct 03, 2009

  • Chris Yelton Oct 04, 2009

    between rear two spark plugs. on drivers side

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2 Answers

Where is the engine coolant temperature sensor on a 2004 Chey trailblazer?


Engine Coolant Temperature (ECT) Sensor (LL8)
On the left front of the engine block, near the generator

Mar 08, 2017 | 2004 Chevrolet TrailBlazer

2 Answers

We're is the coolant temperature sense located on a 2008 trailblazer lt


Hi Janice , Before I say where the coolant temp. sensor is I'd just like to make you aware of a couple of thing's before you replace this sensor needlessly .It's one thing if you have a DTC diagnostic trouble code for the sensor but another if your temp. gauge isn't work ! You see the coolant temp. sensor is an input to the engine computer , not directly to the temp. gauge.
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine coolant temperature. The engine coolant temperature gage defaults to 100°F (40°C) or below if: ?€¢
The ECM detects a malfunction in the engine coolant temperature sensor circuit.


?€¢
The IPC detects a loss of serial data communications with the ECM.

Jan 01, 2016 | 2008 Chevrolet TrailBlazer LT

1 Answer

I have a 04 trailblazer check engine light was ongot it checkednumber 1 misfireI just replaced the cords and plugs so I took me 1 off put it on 2 the check engine light went off got home put the code...


code p0128 refers to coolant thermostat--coolant below thermostat regulating temperature==causes mechanical fault. ( thermostat stuck open --replace it) If you are experiencing cold weather then there is a problem with the ecm settings as the ecm should be compensating for the cold ambient temperature and setting the fuel mixture to richer than normal ( same as using a choke). Check the fault codes again and check for a coolant sensor fault.

Oct 31, 2014 | 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

03 trailblazer 4.2 l code p0172 has no power


P0172 02 sensor is detecting that the system is running too rich. An 02 sensor that is starting to go out will pull this code, but the following will cause the 02 sensor to throw this code as well:

A few things to look at. 1st thing I'd do is clean your throttle body with the battery disconnected. Use sensor safe throttle body cleaner, about $4.

From there, I'd look at your upstream 02 sensor, located on the exhaust manifold on passenger side of engine, very easy. Try and stay away from Bosch if possible.

New fuel filter, clean or replace your MAF sensor located on top of engine next to firewall. Also, probably time to change your spark plugs. I recommend A/C Delco 41-103, will idle better than other brands.

Jun 20, 2011 | 2003 Chevrolet TrailBlazer

2 Answers

2005 trailblazer code 0126 checked reset didnt come back on yet'but dont show that code in my list


www.obd-codes.com/trouble_codes insufficiant coolant temp for stable operation thats an uncommon one. unless u have no thermostat or to cool of one u shouldnt have that code again usualy comes on when a seensor is wrong, bad but not out of range for the computer to show coolant temp sensor. very uncommon. if it comes back on again then check ur sensor and wires also it may have just been ur thermostat stuck open. u may want to put a new one in it it runs cold. u should be able to tell by the gauge if ur temp is ok. most gm engines have two sensors. one for the computer and one for the gauge. not always though.

Nov 18, 2010 | 2005 Chevrolet TrailBlazer

2 Answers

Where is the coolent control sensor located on a 2002 LT trailblazer


2.2L & 2.4L Engines
  1. Turn OFF the ignition.
  2. Drain the coolant system to below the ECT sensor.
  3. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
  4. Carefully remove the ECT sensor.
  5. Installation is the reverse of the removal procedure. Coat sensor threads with thread lock sealant and tighten sensor to 89 inch lbs. (10 Nm).
It looks like this:

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Typically screwed into a coolant passage in the intake manifold or the thermostat housing.

Nov 13, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

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

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