Chevrolet SS Engine Coolant Temperature Sensor Guide (2014-2017)
Keep your SS running strong by understanding this small but critical sensor.
- A faulty ECT sensor can cause a check engine light, erratic temp gauge readings, and fans that run constantly.
- The sensor is located on the front of the driver's side cylinder head and is easy to replace yourself.
- Use a high-quality OEM (ACDelco) or reputable aftermarket (Delphi, NGK) brand to avoid incorrect readings.
- Do not confuse the ECT sensor with the oil temperature sensor, which is in a different location.
Is Your Temp Gauge Acting Up? It Might Be the ECT Sensor.
The Engine Coolant Temperature (ECT) sensor is a common failure point on many vehicles, and the Chevrolet SS is no exception. Because it plays a key role in how your LS3 engine runs, a faulty sensor can cause a range of noticeable problems. Symptoms often appear suddenly and can include an illuminated Check Engine Light, an inaccurate temperature gauge on your dash, and cooling fans that either won't turn off or won't turn on at all. Fortunately, this is a relatively simple and inexpensive part to replace.
Symptoms of a Failing Engine Coolant Temperature Sensor
A bad ECT sensor can make your car's computer think the engine is cold when it's hot, or hot when it's cold. This confusion leads to several distinct symptoms:
- Check Engine Light: This is often the first sign. The ECU will log fault codes like P0117, P0118, or P0128 🎬 Watch: EricTheCarGuy explains what these P0118 codes actually mean. when it detects a problem with the sensor's signal.
- Erratic or Inaccurate Temp Gauge: The gauge on your dashboard may read ---, stay stuck on cold, jump to hot immediately, or fluctuate wildly.
- Cooling Fans Run Constantly: As a fail-safe, the ECU may run the cooling fans at full speed all the time if it gets an invalid signal from the ECT sensor. 🎬 See why your radiator fans might be running constantly.
- Poor Fuel Economy: If the sensor incorrectly tells the ECU the engine is cold, the computer will enrich the fuel mixture, causing you to use more gas.
- Black Smoke from Exhaust: A very rich fuel mixture from a bad sensor reading can result in black smoke from the tailpipe as unburnt fuel is sent through the exhaust.
- Engine Overheating: In a less common failure mode, the sensor could fail to signal a hot engine, preventing the cooling fans from turning on when needed.
Pro Tip: Location
The ECT sensor for the 2014-2017 Chevrolet SS is located on the front of the driver's side cylinder head. It is threaded into the head and is easily accessible once the engine cover is removed.
Choosing the Right Aftermarket Sensor
While many aftermarket brands are available, sensor quality can vary significantly. For a critical component like the ECT sensor, using a low-quality part can cause persistent issues. Based on owner feedback and OEM supply chains, it's best to stick with reputable brands.
- Tier 1 (OEM / OEM-Equivalent): ACDelco is the original equipment manufacturer for GM. Delphi was a longtime GM parts division and is widely considered an OEM-quality supplier for electronics. Choosing one of these brands guarantees a perfect fit and correct electronic readings.
- Tier 2 (High-Quality Aftermarket): Brands like NGK and Standard Ignition (SMP) have a strong reputation for producing reliable sensors that meet or exceed OEM specifications. These are solid choices if an OEM part isn't available.
- Tier 3 (Value Brands): Other brands like Four Seasons, Walker Products, or store-brand sensors offer a lower price point. While they may function correctly, they have a higher risk of inaccurate readings or a shorter lifespan compared to top-tier brands. For the small price difference, it is highly recommended to use a Tier 1 or Tier 2 brand for your SS.
Cost to Replace Chevrolet SS Coolant Temperature Sensor
| Part Type | Price Range |
|---|---|
| New OEM (GM/ACDelco) | $25 - $55 |
| New Aftermarket | $17 - $42 |
| Shop Labor | $50 - $100 |
Common Ordering Mistake
Your Chevrolet SS has more than one temperature sensor. A common mistake is ordering the Engine Oil Temperature Sensor by accident. The oil temp sensor is located on the oil pan. Double-check that you are purchasing the Engine Coolant Temperature Sensor, which is located on the driver's side cylinder head.
Frequently Asked Questions (FAQ)
Where is the ECT sensor located on a 2014-2017 Chevy SS?
The engine coolant temperature sensor is screwed into the front of the driver's-side cylinder head. It is easy to see and access after removing the plastic engine cover.
Can I replace the ECT sensor myself?
Yes, this is a very DIY-friendly job. It requires basic tools like a deep socket and ratchet. The engine must be cold. When you unscrew the old sensor, a small amount of coolant will leak out, so be ready to quickly install the new one. The entire process typically takes less than 30 minutes.
🎬 Watch this walkthrough on how to test and replace the sensor.Are there any recalls for the ECT sensor on the Chevy SS?
No, as of late 2024, there are no specific recalls or Technical Service Bulletins (TSBs) from GM or the NHTSA for a widespread failure of the engine coolant temperature sensor on the 2014-2017 Chevrolet SS.
What happens if I don't replace a bad ECT sensor?
Driving with a bad ECT sensor is not recommended. It can lead to significantly reduced fuel economy, failed emissions tests, and poor engine performance. Most importantly, it can prevent you from knowing if your engine is truly overheating, which could lead to catastrophic engine damage.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12608814
ACDelco Part Number: 213-4514. Thread Size: M12x1.5. Connector: 2-Pin Male.
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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.
- Chevrolet SS:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Temp Gauge Acting Up? It Might Be the ECT Sensor.
- Symptoms of a Failing Engine Coolant Temperature Sensor
- Pro Tip: Location
- Choosing the Right Aftermarket Sensor
- Cost to Replace Chevrolet SS Coolant Temperature Sensor
- Common Ordering Mistake
- Frequently Asked Questions (FAQ)
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