Engine Coolant Temperature Sensor Guide for the 2000-2002 Chrysler Neon
Experiencing poor fuel economy, overheating, or a check engine light in your Neon? Your coolant sensor may be the problem.
- A failing ECT sensor on a Neon commonly causes a Check Engine Light with codes P0117 or P0118, poor gas mileage, and overheating.
- The sensor is located on the driver's side of the cylinder head; replacement is a simple DIY job for most owners.
- Before replacing the sensor, inspect the wiring connector for damage, as oil leaks can cause similar symptoms.
- Quality aftermarket brands like NGK or Standard Ignition offer a reliable and cost-effective alternative to the more expensive OEM Mopar part.
Is Your Neon's Coolant Temp Sensor Failing?
When the ECT sensor on your Chrysler Neon starts to fail, it sends incorrect information to the engine's computer. This can cause a surprising number of issues. The computer might think the engine is always cold, causing it to run rich (too much fuel), or it might not realize the engine is overheating because the sensor isn't telling it to turn the cooling fans on. Before you replace the sensor, it's wise to check the wiring and connector first. 🎬 Watch this diagnostic guide for troubleshooting Neon sensor codes. Oil leaks on the 2.0L engine can damage the wiring insulation over time, causing a bad connection that mimics a failed sensor.
Choosing the Right Aftermarket Sensor
For a vehicle like the 2000-2002 Neon, aftermarket sensors offer excellent value. While an OEM Mopar part is available, a quality aftermarket part from a reputable brand will perform reliably for a fraction of the cost. Aftermarket brands often use the same quality materials, like brass housings, and test to meet or exceed original specifications.
Aftermarket Brand Tiers
- Premium Aftermarket (NGK, Standard Ignition) 🎬 Learn more about how NTK sensors ensure engine efficiency.: These brands are well-regarded in the industry for producing parts that meet or exceed OEM standards. They are known for their reliability and are a solid choice for a direct, quality replacement.
- Standard Aftermarket (Motorad, Holstein, Four Seasons): These brands provide a good balance of quality and cost. They manufacture sensors to OEM specifications and are a reliable option for most repairs.
- Economy (True Tech): These are budget-friendly options that get the job done. While they meet basic requirements, long-term durability may vary compared to premium brands.
| Part Type | Estimated Cost |
|---|---|
| New OEM (Mopar) | $39 - $85 |
| New Aftermarket | $13.22 - $40.84 |
| Shop Labor | $95 |
Frequently Asked Questions
Where is the coolant temperature sensor located on my 2000-2002 Neon?
The ECT sensor is located on the driver's side of the engine, threaded into the back of the cylinder head. It is often found near or below the heater hoses that go to the firewall. You may need a light to see it clearly.
My temperature gauge is acting weird. Is this the right sensor?
It's important to know that many older Chrysler vehicles, including the Neon, may have two separate sensors. One sensor, the ECT, sends information to the engine computer. A second sensor, the "coolant temperature sending unit," sends information to the temperature gauge on your dashboard. This article focuses on the ECT sensor for the computer. If only your gauge is acting up but the car runs fine, you may need the other sensor.
Can a bad ECT sensor cause my cooling fan not to work?
Yes, absolutely. The engine computer relies on the ECT sensor's reading to know when the engine is hot enough to require the cooling fans. If the sensor is faulty and not reporting the high temperature, the computer will not command the fans to turn on, which can lead to overheating, especially in stop-and-go traffic.
Do I need to drain the coolant to replace this sensor?
You do not need to drain the entire cooling system. However, since the sensor is threaded into a coolant passage, some coolant will leak out when you remove the old sensor. To minimize loss, have the new sensor ready to install quickly. Make sure the engine is completely cool before starting this repair to avoid burns and relieve any pressure in the system.
Helpful Videos
Technical Specifications
OEM Part Numbers: 56027873 5269870AB
2-prong blade type male terminal, brass housing, threaded body.
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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.
- Chrysler Neon: