Dodge Journey Engine Coolant Temperature Sensor: A Complete Guide (2009-2020)
Experiencing engine problems or a check engine light in your Dodge Journey? It could be a faulty coolant temperature sensor.
- A bad ECT sensor can cause overheating, poor fuel economy, and a check engine light.
- Symptoms include an erratic temperature gauge, cooling fans always on, and rough idling.
- Verify your engine (2.4L, 3.5L, or 3.6L) before buying, as the part may differ.
- Premium aftermarket brands like Delphi or Standard Ignition offer a good balance of quality and price.
Is a Failing Coolant Sensor a Big Deal?
Yes, it can be. A bad Engine Coolant Temperature (ECT) sensor can leave you stranded or cause other parts to fail. When your Journey's computer gets a wrong temperature reading, it makes bad decisions. It might inject too much fuel, thinking the engine is cold when it's not, which wastes gas and can lead to black smoke from the exhaust. Or, it might not turn the cooling fans on, risking engine overheating. Ignoring the signs of a failing sensor can lead to more expensive repairs down the road.
Can I still drive with a bad ECT sensor?
It's not recommended. While the car may run, a faulty sensor can cause the engine to overheat, run poorly, or use excessive fuel. If the temperature gauge is behaving erratically or the check engine light is on, it's best to get it checked and replaced as soon as possible to avoid potential engine damage.
Choosing the Right Aftermarket Sensor for Your Journey
When it comes to replacing the ECT sensor, you don't have to buy the expensive Mopar part from the dealer. Many aftermarket brands offer quality replacements at a better price. However, quality can vary.
- Premium Aftermarket (Delphi, NGK, Standard Ignition): Brands like Delphi are often original equipment manufacturers for many car companies. They are known for reliable, long-lasting parts that meet or exceed factory specifications. Standard Ignition and NGK also have a strong reputation for quality engine management parts. These are a solid choice for a reliable, long-term repair.
- Standard Aftermarket (Dorman, Four Seasons, Walker Products): Dorman is a well-known brand that offers a wide range of parts that are designed to be direct replacements for the original. They often provide good value and are widely available. While generally reliable, some forum users report mixed experiences with sensor longevity compared to premium or OEM parts.
- Economy Brands: While the lowest price can be tempting, economy sensors may have a higher failure rate or less accurate readings. For a critical part like the ECT sensor, it's often worth spending a few extra dollars for a more reputable brand to avoid doing the job twice.
Check Your Engine
The Dodge Journey was available with a 2.4L 4-cylinder, a 3.5L V6 (2009-2010), and a 3.6L V6 (2011-2019). The exact part number and sensor location can vary by engine. Always verify your engine size before ordering to ensure you get the correct part.
How Much Does a New Sensor Cost?
The cost to replace an ECT sensor is very reasonable, especially if you do it yourself. The part itself is inexpensive, and labor is minimal.
| Item | Estimated Cost |
|---|---|
| OEM Mopar Sensor | $50 - $80 |
| Aftermarket Sensor | $15 - $75 |
| Shop Labor | $75 - $150 |
Frequently Asked Questions (FAQ)
Where is the ECT sensor located on a Dodge Journey?
The location depends on your engine. On the 3.6L V6, the sensor is located near the front of the engine, close to the cooling fan assembly. 🎬 See the 3.6L V6 sensor location and replacement steps. For other engines, it is typically found on the cylinder head, engine block, or thermostat housing. A quick search for your specific year and engine model will often yield a diagram or video showing the exact location.
What are the common OBD-II codes for a bad ECT sensor?
Common codes include P0117 (Sensor Circuit Low Input), P0118 (Sensor Circuit High Input), and P0128 (Coolant Thermostat - Coolant Temperature Below Thermostat Regulating Temperature). A P0118 code, for example, often occurs when the sensor fails and sends a reading of -40 degrees, causing the cooling fans to run constantly.
Are there any recalls for the Dodge Journey ECT sensor?
As of early 2026, there are no specific recalls issued by the NHTSA for the engine coolant temperature sensor on the 2009-2020 Dodge Journey. However, there are several Technical Service Bulletins (TSBs) related to the cooling system and potential leaks, which could indirectly affect sensor performance.
Can I replace the sensor myself?
Yes, this is a DIY-friendly job for most home mechanics. The main steps involve allowing the engine to cool completely, partially draining the coolant to avoid a mess, unplugging the electrical connector, unscrewing the old sensor, and quickly installing the new one. You will then need to top off the coolant and clear any check engine codes. The difficulty is generally low, and it can be done in under an hour.
🎬 Follow this walkthrough for the 2.4L engine sensor replacement.Helpful Videos
Technical Specifications
OEM Part Numbers: 5149077AB
Typically a 2-pin/blade style thermistor sensor that screws into the engine block, cylinder head, or thermostat housing.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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