2012 dodge journey temperature sensor location

P0128 on a Dodge Journey with 3.6L (Thermostat Location)

The 3.6-liter engine from Chrysler has become a headache for Dodge Journey owners. From a check engine light to losing coolant and leaking oil, the 3.6-liter engine has been a nightmare. In this article, we will look at a common leak that plagues the 3.6-liter engines.

A common trouble code (or DTC) that causes the check engine light is the code P-0128 (P0128).

What does error code P0128 mean on a Dodge Journey?

P0128 - Thermostat Rationality

The P0128 code indicates a problem with the cooling system (coolant system). The engine control module notices that the engine temperature is below where it should be operating within a specified amount of time.

The engine control module uses the engine coolant temperature sensor to monitor the engine's temperature. An engine coolant thermostat will regulate the amount of flow of coolant through the engine to obtain the optimal temperature.

A thermostat will stay closed until the engine reaches operating temperature. After the operating temperature is obtained, the thermostat and radiator fans will keep the engine's temperature in a specific range.

This thermostat opens at 203F.

What year did the Dodge Journey have the 3.6L engine?

The 3.6-liter engine was introduced in the 2011 Dodge Journey models and was available through the 2019 models.

What causes the P0128 code on a Dodge Journey?

The most common cause for the P0128 code on a Dodge Journey is a faulty thermostat.

A faulty thermostat can be what is described as a "stuck open thermostat."

Other issues can be low coolant, a bad radiator fan or water pump, an inaccurate engine coolant temperature sensor (ECT sensor), or a bad engine control module.

How do I fix code P0128 on a Dodge Journey?

The best way to fix P0128 is to find the root cause of the problem and repair it.

A quick diagnostic process for a p0128 is:

Define the code

Check your coolant (with a cold engine. Never open the cooling system when the engine is hot)

Use a scan tool to monitor the temperature of the coolant and the length of time to reach normal operating temperature

Determine if the thermostat stays open

Replace the thermostat

Where is the coolant thermostat and thermostat housing located on a Dodge Journey?

The thermostat and thermostat housing is located on the front of the 3.6-liter engine on the Dodge Journey.

Frequently Asked Question:

Where do I find wiring diagrams and step-by-step repair procedures for Dodges?

The best online resource I use is Alldatadiy.com.

I used it for this case study to find the correct procedure for this Dodge Journey.

What are some symptoms of the P0128 code?

Here are some symptoms of a P0128 code:

A check engine light

The temperature gauge (temp gauge) may not reach the proper operating temperature or normal range

Cooling fans run constantly

Lack of heat or hot air coming out of the vents

Can I still drive my car with a P0128 code?

Generally, you can drive with a P0128 code but always monitor the temperature gauge. You may notice that with this code, the temperature gauge will not reach normal operating temperature.

What are the tools I need to change this part?

Some tools that you will need are:

A socket set to remove the bad thermostat.

A set of pliers to remove the hose clamps that is on the upper radiator hose

New coolant to fill the coolant system and the overflow tank (You don't want to have low coolant)

Rag to clean the mating surface of the new thermostat.

Coolant fill kit

All of the air has to be removed from this Cooling System or engine damage will occur!

Make sure your engine’s coolant is filled to normal levels. Air in the cooling system can cause damage when the engine heats up.

The correct operating temperature can only be obtained if all the air is bled out of the cooling system.

Not knowing how to bleed the cooling system properly can take this easy job and make it a horrible nightmare.

Caution - Hot Coolant

DO NOT work on a vehicle that has been operating for an extended period. The coolant in the cooling system can be extremely hot and cause severe burns. Always allow a hot engine to cool off before working on it.

You may want to wait until the next day for the engine to be completely cooled off.

If you have concerns, allow a professional mechanic to replace the part for you.

What other common problems can cause this code?

Although a faulty thermostat is the most likely solution for this code, there are other factors that can cause a P0128.

Other possible causes are:

Engine coolant temperature sensor (Coolant sensor or coolant temp sensor) - If the engine coolant temperature sensor reading is incorrect, it can report the wrong temperature to the powertrain control module (PCM). If the engine coolant temperature sensor reads 120 degrees F while the engine coolant is actually 190 degrees F, then that can cause a P0128.

Coolant level - If the coolant level is incorrect, there is a chance that it will cause a DTC P0128 (Diagnostic Trouble Code).

When you get done installing the new thermostat, clear the trouble codes and monitor the coolant temperature with a compatible code reader. It should increase until it reaches the normal operating temperature.

If you don't have a good code reader, check out the ones below.

Disclaimer and Disclosure:

Make sure all parts mentioned are compatible with your vehicle

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P0128 on a Jeep Grand Cherokee with 3.6L (Thermostat Location)

P0128 on a dodge grand caravan with 3.6l (thermostat location).

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Engine Coolant Temp sensor

By pdl2mdl January 7, 2017 in Maintenance & D.Y.I.

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I have a 3.6L 2013 Dodge Journey.  I read an error code of p0128.  The coolant level is fine, the car does not take an overly long time to warm up, nor is it over heating.  I'm surmising that the issue is with the ECT.  I've been told it's a part of the oil filter assembly, but am seeing no way of accessing it.  Has anyone changed the ECT and can tell me how to do it?

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google p 0128 points to a faulty thermostat .

specifically, p0128, is coolant  temperature below thermostat regulating temp, which could be any of a number of issues.  I don't believe it is the thermostat at this time because I'm not having any running issues (over heating, under heating, failure/difficulty in shifting at freeway speeds).

It is part of the oil filter assembly.  As to how to change it, I have no idea. 

• 4 months later...

I just changed this on my '12 Journey with the 3.6.  It's located about halfway down the front of the block.  Threaded right into the block at an angle..  It's an easy swap and the part is under 20$.

P0128 indicates (in order): failed/failing thermostat, failed engine coolant temperature sensor, PCM update needed, low coolant, radiator fan not turning off, or faulty intake air temperature.

Thermostat can be tested "the old fashioned way" - squeeze the coolant hose (between thermostat and radiator) while the engine is cold - you should hear coolant moving and push the radiator cap, and you should see the overflow bottle level change as you do this.  Get the engine up to temp (10 minutes of driving should be more than enough) and touch the hose - it should uncomfortably hot, but not hot enough to burn (too quickly).  This is, of course, assuming you haven't paid someone to do that part already.

2013 Engine  Coolant Temperature Sensor should be part 5149077AB.  https://www.amazon.com/Genuine-Chrysler-5149077AB-Coolant-Temperature/dp/B00FYHR5DY

That part is not a piece of the oil filter housing.  Removal is a matter of locating the sensor (straight from a repair manual: "The Engine Coolant Temperature ( ECT ) sensor on the 3.6L engine is installed into a water jacket at rear of the cylinder head on the left side of the engine . "), remove the cable, and unbolt it from the engine block (deep socket, not sure what size).  You'll need to partially drain coolant  before you remove it.  Depending on your mileage, it might be time to think about a coolant flush anyway.  Otherwise, drain a gallon, then re-fill with new coolant (50/50 mix) when you have the sensor re-installed.

Installation is pretty straightforward - just put everything back together.  11 N*m (8 ft.lbs.) to install.  Use a PTFE thread sealant.  Add coolant , purge air, and you should be done.

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Where are the coolant temp sensors located on a dodge journey 2009 rt

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• 1010 Answers
• Posted on Jun 18, 2008

SOURCE: coolant temp sensor

Here is a picture, hope it will help http://www.lunghd.com/Tech_Articles/Engine/Basic_Sensors_Diagnostics/Sensor_Coolant_Temp_2.jpg

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• Posted on Aug 24, 2008

SOURCE: Ford 460 Engine Temp sensor

looking at  the  front of  the engine, just to  the right and behind  the  distributor cap. You  will  see a  wire attached (push on).

• 137 Answers
• Posted on Feb 19, 2009

SOURCE: Air Temp Sensor location

its behind the fascia and in front of the radiator

• Posted on Apr 09, 2009

SOURCE: Need to know the location of coolant temp sensor

it should be right by the upper radiator hose. it just unscrews. go to auto zone they can help..youll have to drain some coolant. or go to the library for help

• Posted on Jul 29, 2009

SOURCE: location of coolant temp sensor

where can locate the engine coolant temperture sensor.

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2012 Dodge Journey

2012 Dodge Journey - Ambient Air Temperature Sensor

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Ambient air temperature sensor replacement.

The ambient air temperature sensor, or outside air temperature sensor, measures the temperature of the air outside of a vehicle. This sensor is commonly located behind the grille or elsewhere on the front of the vehicle in a position that allows it to sense the temperature of the surrounding air. An ambient air temperature sensor converts changes in temperature into electrical signals to be interpreted by the vehicle's computer, and the outside temperature is often displayed on the dash or overhead display. These signals may also be used to adjust engine performance to ensure absolute peak efficiency in varying weather conditions. Due to the heat from your engine, the road, or sunlight, it is normal for the sensor to be a few degrees off. However, if the readings are consistently inaccurate, you may need a replacement ambient air temperature sensor. Some common signs of a faulty sensor include inaccurate temperature readings, issues with the climate control system, and reduced engine performance. An open or shorted circuit or damaged wiring connector can cause the sensor to read at its lowest or highest temperature, either around forty below zero or up to around 120 degrees Fahrenheit on many vehicles. If you need a replacement, shop O'Reilly Auto Parts, where we carry new ambient air temperature sensors for most vehicles.

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