Dodge Grand Caravan Engine Coolant Temperature Sensor Guide (2008-2020)
Is your Grand Caravan overheating or getting bad gas mileage? Your coolant temperature sensor might be the problem.
- A bad coolant sensor can cause overheating, poor fuel economy, and a check engine light with codes P0117, P0118, or P0128.
- Replacement is a simple, low-cost DIY job for most owners, requiring basic tools and about 30 minutes.
- For the 3.6L engine, the sensor is on the front passenger side of the engine.
- Premium aftermarket brands like Delphi, NGK, and Standard Motor Products offer OEM-level quality for less money.
Is Your Dodge Grand Caravan Showing Signs of a Bad Coolant Sensor?
A failing Engine Coolant Temperature (ECT) sensor can cause a surprising number of problems with your minivan. Because the engine's computer relies on this sensor for critical information, a bad signal can make the vehicle run poorly. If you ignore the signs, you could risk poor fuel economy or even serious engine damage from overheating.
Common Symptoms of Failure:
- Check Engine Light: This is often the first sign. You may see codes like P0117, P0118, or P0128.
- Engine Overheating or Running Hot: If the sensor fails to report a high temperature, the cooling fans may not turn on when needed.
- Poor Fuel Economy: A false 'cold' signal can cause the engine to run rich, using more fuel than necessary.
- Black Smoke from Exhaust: This is another sign of a rich fuel mixture, where too much gasoline is being burned.
- Hard Starting: The engine may be difficult to start, especially when it's already warm.
Warning: Do Not Ignore Overheating
If your temperature gauge is in the red or you see a warning light, pull over as soon as it is safe. Driving an overheating engine can lead to catastrophic failure, including warped cylinder heads and complete engine seizure.
Choosing the Right Aftermarket Sensor for Your Grand Caravan
When replacing the ECT sensor, you have a choice between OEM (Mopar) and various aftermarket brands. For a simple electronic sensor like this, a high-quality aftermarket part can provide the same performance as the original for a lower price. However, it's wise to avoid the cheapest, no-name options, as they can fail prematurely.
Brand Quality Tiers
- OEM / Premium Aftermarket (Highest Quality & Price): Mopar is the original factory part. Brands like Delphi, NGK/NTK, and Standard Motor Products (SMP) are known for making parts that meet or exceed OEM specifications and are often trusted by professional mechanics.
- Quality Aftermarket (Good Value): Brands like Beck Arnley, Holstein, and Walker Products generally offer reliable parts that are a good balance of price and quality for most owners.
- Economy Brands (Budget-Focused): Brands like Dorman and other store brands can be a cost-effective solution. While often perfectly functional, they may not have the same long-term durability or precise calibration as premium brands.
Pro Tip: Check the Connector
Before you replace the sensor, inspect the wiring connector. Sometimes, the problem is a corroded or loose connector, not the sensor itself. Make sure the locking tab (often a red clip) is secure after installation.
Cost to Replace a Grand Caravan Coolant Temperature Sensor
Replacing the ECT sensor is one of the more affordable repairs you can perform on your vehicle. The part itself is inexpensive, and if you do it yourself, the cost is minimal. Even having a shop perform the work is relatively cheap.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Mopar) Part | $50 - $85 |
| New Aftermarket Part | $15 - $75 |
| Shop Labor | $77 - $113 |
| Total Professional Replacement | $92 - $188 |
Frequently Asked Questions
Where is the coolant temperature sensor located on a 2008-2020 Grand Caravan?
The location depends on your engine. For the 3.6L V6 engine (2011-2020), the sensor is located on the front of the engine, on the right (passenger) side, in the cylinder head. For the older 3.3L and 3.8L V6 engines, it is typically found on the right side near the back of the engine. You will see a small sensor with a two-wire electrical connector.
Can I replace this sensor myself?
Yes, this is a very DIY-friendly job for most home mechanics. It typically requires only basic hand tools, like a deep socket (usually 19mm) and a ratchet. The main steps are to partially drain the coolant, disconnect the electrical connector, unscrew the old sensor, and install the new one. Always work on a cool engine to avoid burns.
What happens if I don't replace a bad coolant sensor?
You will likely experience poor fuel mileage, failed emissions tests, and potentially hard starting. The most serious risk is engine overheating if the sensor fails to trigger the cooling fans, which can lead to very expensive engine damage.
Is a Mopar sensor better than aftermarket for my Grand Caravan?
A Mopar sensor guarantees a perfect fit and original performance. However, for this specific part, premium aftermarket brands like Delphi or NGK offer comparable quality and reliability for a lower price. For a daily driver, a quality aftermarket sensor is an excellent choice.
Are there any recalls for this part?
As of late 2023, there are no specific NHTSA recalls for the engine coolant temperature sensor on the 2008-2020 Dodge Grand Caravan. Always check the NHTSA website for the most current information using your vehicle's VIN.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5149077AB 68164627AA
Typically a 2-pin, plug-in sensor with a threaded body. The connector is usually secured with a red locking tab.
We Have This Part in Stock
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 Grand Caravan:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Dodge Grand Caravan Showing Signs of a Bad Coolant Sensor?
- Common Symptoms of Failure:
- Warning: Do Not Ignore Overheating
- Choosing the Right Aftermarket Sensor for Your Grand Caravan
- Brand Quality Tiers
- Pro Tip: Check the Connector
- Cost to Replace a Grand Caravan Coolant Temperature Sensor
- Frequently Asked Questions
- 🎟️ Get 5% Off