Pontiac Pursuit (2005-2006) Engine Coolant Temperature Sensor Guide
Keep your Pursuit's engine running right by understanding, diagnosing, and replacing a faulty coolant temperature sensor.
- A bad ECT sensor can cause a Check Engine Light, poor fuel economy, and overheating.
- This is a simple, low-cost DIY repair for most owners, taking less than an hour.
- For best results, choose a premium aftermarket brand like NGK/NTK or Standard Ignition (SMP), or an OEM ACDelco part.
- Symptoms for this part are identical for the more common 2005-2006 Chevrolet Cobalt.
Is Your Pursuit's Temperature Gauge Acting Up?
A faulty Engine Coolant Temperature (ECT) sensor can cause a variety of confusing problems for your 2005-2006 Pontiac Pursuit. Because this sensor provides critical data to the engine's computer, a bad reading can make the car behave erratically. You might notice the temperature gauge on your dashboard giving false readings, like showing the engine is overheating when it's not, or not moving at all. Other common signs include a Check Engine Light, poor fuel mileage, or the engine's cooling fans running all the time or not coming on when they should.
Common Failure Symptoms
- Check Engine Light is on
- Inaccurate or erratic temperature gauge readings
- Engine overheating
- Cooling fans run constantly or not at all
- Reduced fuel economy
- Black smoke from the exhaust (running rich)
- Hard starting when the engine is warm
Choosing the Right Aftermarket ECT Sensor
For the 2005-2006 Pontiac Pursuit, the original sensor is an ACDelco part. While you can still buy this OEM (Original Equipment Manufacturer) part, there are many quality aftermarket options that offer a great balance of price and performance. Aftermarket sensors are not all created equal, so it's helpful to understand the different tiers available.
Premium Aftermarket (NGK, Standard Ignition): Brands like NGK (under their NTK sensor line) and Standard Ignition (SMP) are well-respected in the industry. They often manufacture parts for car companies directly and their aftermarket products are known for high quality control and durability. Choosing a sensor from these brands is the closest you can get to OEM quality, providing peace of mind and reliable performance.
Standard Aftermarket (Four Seasons, Motorad, Holstein): These brands offer a solid middle ground. Motorad, for example, specializes in cooling system components and produces sensors designed to meet or exceed OEM specifications. Four Seasons and Holstein also provide dependable parts that are a popular choice for daily drivers, offering good value without a significant compromise in quality.
Economy Brands (Global Parts, True Tech, Standard Wires): These brands focus on providing the most budget-friendly options. While they will get the job done, they may use less robust materials or have wider manufacturing tolerances. They can be a good choice for a quick, inexpensive fix, but may not have the same long-term durability as premium or standard tier brands.
Pro Tip: The Pontiac Pursuit shares its platform and 2.2L Ecotec engine with the Chevrolet Cobalt. Owner and mechanic experiences with Cobalt parts are directly applicable to your Pursuit. Many forum users recommend sticking with a well-known brand like ACDelco, NGK, or Standard Ignition for critical sensors to avoid premature failure.
Cost of Replacing the ECT Sensor
Replacing the ECT sensor is one of the more affordable repairs you can make. The part itself is inexpensive, and if you have it done at a shop, the labor is minimal.
| Item | Estimated Cost |
|---|---|
| New OEM (ACDelco) Part | $20 - $40 |
| New Aftermarket Part | $16 - $32 |
| Shop Labor | $50 - $100 |
| Total Professional Replacement | $70 - $140 |
Frequently Asked Questions
Where is the ECT sensor located on a 2005-2006 Pontiac Pursuit?
On the 2.2L Ecotec engine, the ECT sensor is located near the thermostat housing, on the driver's side of the engine block, below the exhaust manifold heat shield. It screws directly into the engine block or thermostat housing.
Do I need to drain the coolant to replace the sensor?
Yes, it is highly recommended. If you don't drain the coolant, it will spill out of the sensor port when you remove the old one. You only need to drain enough coolant so the level is below the sensor. You can often reuse the coolant if you drain it into a clean container.
Is this a difficult repair to do myself?
No, this is a very DIY-friendly repair. The replacement requires basic hand tools, like a deep socket and ratchet. The most common difficulty is accessing the sensor, which may require removing the exhaust heat shield. The entire process typically takes less than an hour.
Are there any recalls or TSBs for this part?
There are no specific recalls or Technical Service Bulletins (TSBs) for the engine coolant temperature sensor on the 2005-2006 Pontiac Pursuit. However, there were several major recalls for this vehicle related to the ignition switch and electric power steering.
Technical Specifications
OEM Part Numbers: 19236568 213-4514
Thread Size: M12 x 1.5, Terminal Quantity: 2, Connector Gender: 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.
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