Guide to the Engine Coolant Temperature Sensor for Your Dodge
You're looking for a part for a 2002-2006 Dodge Avenger, but that car doesn't exist; here's what you need to know.
- The Dodge Avenger was not made between 2001 and 2007; the vehicle for the 2002-2006 model years is the Dodge Stratus.
- Verify you own a Dodge Stratus before buying parts, as Avenger parts will not fit.
- A failing ECT sensor on a Stratus can cause overheating, poor fuel economy, and a check engine light.
- For the Stratus, reputable aftermarket brands like Delphi or NTK offer a reliable and cost-effective replacement.
Identifying Your Vehicle: Avenger vs. Stratus
If you are shopping for parts for a 2002, 2003, 2004, 2005, or 2006 Dodge Avenger, it is important to know that Dodge did not produce the Avenger during these years. The Dodge Avenger was sold as a coupe from 1995 to 2000 and was later reintroduced as a sedan from 2008 to 2014.
The mid-size Dodge sedan sold during the 2002-2006 period was the Dodge Stratus. It is very likely you own a Dodge Stratus if your vehicle is from this model year range. The Stratus sedan was produced from 2001 to 2006, replacing the previous generation of Stratus and effectively filling the spot the Avenger coupe left. The second-generation Avenger sedan would later go on to replace the Stratus in 2007 for the 2008 model year.
Confirm Your Model
Before purchasing an Engine Coolant Temperature Sensor, double-check if your vehicle is a Dodge Stratus, not an Avenger. Parts for these two different models are not interchangeable.
Information for the 2001-2006 Dodge Stratus
Since you are likely working on a Dodge Stratus, this guide will focus on information relevant to that vehicle.
Symptoms of a Failing ECT Sensor on a Dodge Stratus
A failing coolant temperature sensor can cause a variety of issues because it sends incorrect data to the engine's computer. Common symptoms include:
- Check Engine Light: The most common sign is an illuminated Check Engine Light.
- Poor Fuel Economy: If the sensor incorrectly tells the computer the engine is cold, the computer will enrich the fuel mixture, causing the car to use more gas than necessary.
- Engine Overheating: A bad sensor might fail to trigger the cooling fans or provide a warning on your dashboard, leading to the engine overheating.
- Rough Idle or Stalling: Incorrect temperature readings can lead to improper fuel and air mixture, causing the engine to run poorly.
- Black Smoke from Exhaust: This is a sign of a rich fuel mixture, which can be caused by a faulty ECT sensor telling the computer the engine is perpetually cold.
Choosing an Aftermarket ECT Sensor for a Stratus
For a vehicle like the 2001-2006 Dodge Stratus, aftermarket parts offer good value. The quality of aftermarket sensors has improved significantly, and they are a reliable choice for this repair.
- Premium Aftermarket (e.g., NTK, Delphi): Brands like NTK and Delphi are often original equipment (OE) suppliers to many automakers. Their parts are designed to meet or exceed factory specifications and are known for their reliability and precise temperature readings.
- Standard Aftermarket (e.g., Carquest, Walker Products): These brands provide a balance of quality and affordability. They are a dependable option for most repairs and often come with a good warranty.
- Economy Brands: While the lowest-priced option, quality can be inconsistent. For a critical sensor like the ECT, it is generally recommended to choose a standard or premium aftermarket brand to avoid premature failure and ensure accurate readings.
Pro Tip
When replacing the sensor, it's a good idea to also check the condition of the electrical connector. A corroded or damaged connector can cause the same symptoms as a bad sensor. Some replacement sensors come with a new connector pigtail.
Frequently Asked Questions (FAQ) for Dodge Stratus ECT Sensor
Where is the ECT sensor located on a 2001-2006 Dodge Stratus?
The Engine Coolant Temperature Sensor is typically located on the thermostat housing, cylinder head, or engine block. For the 2.4L and 2.7L engines common in the Stratus, it is usually found threaded into the coolant passage near the top of the engine.
Can I drive my Stratus with a bad coolant temperature sensor?
It is not recommended. While the car may run, you risk poor performance, terrible fuel economy, and most importantly, potential engine damage from overheating if the sensor fails to provide an accurate temperature reading to the dashboard gauge and cooling fans.
Are there any known issues with the 2001-2006 Dodge Stratus?
Yes, the second-generation Stratus, particularly models with the 2.7L V6 engine, is known for significant engine problems related to oil sludge buildup. This was sometimes caused by a failing water pump (driven by the timing chain) leaking coolant into the engine oil. While not directly an ECT sensor issue, it highlights the importance of a properly functioning cooling system.
Is replacing the ECT sensor a difficult job?
No, for most DIY mechanics, this is a relatively simple job. It usually involves partially draining the coolant, unplugging the electrical connector, and unscrewing the old sensor to install the new one. The difficulty is generally low, requiring basic hand tools.
Technical Specifications
OEM Part Numbers: 5269870AB 56027873
The sensor is a thermistor, meaning its electrical resistance changes with temperature. It typically has a 2-pin connector and is threaded for installation into a coolant passage.
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.
- Dodge Avenger: