Lincoln LS Ambient Air Temperature Sensor Guide (2000-2006)
Fix your Lincoln LS's incorrect temperature display and automatic A/C problems.
- A bad sensor primarily affects the A/C system and the temperature display on the dash.
- This is a very easy and quick part to replace yourself, located right behind the front grille.
- For this simple part, any of the aftermarket brands available are a suitable and cost-effective choice.
- If A/C issues persist after replacement, investigate other common Lincoln LS problems like the Dual Coolant Control Valve (DCCV).
Symptoms of a Failing Ambient Air Temperature Sensor
When the ambient air temperature sensor fails on a Lincoln LS, the symptoms are usually more of an annoyance than a serious problem, but they can directly impact your comfort. You will likely notice one or more of the following issues:
- Incorrect Outside Temperature Display: The most obvious sign is the temperature reading on your dashboard being clearly wrong. It might show a very high or very low temperature (like -40°F or 120°F) regardless of the actual weather.
- Automatic A/C Not Working Correctly: This is the biggest functional problem. If the sensor tells the climate control system that it's freezing outside, the system may prevent the A/C compressor from turning on, leaving you with no cold air on a hot day.
- Check Engine Light: A failed sensor can trigger a Check Engine Light. Common trouble codes associated with this part include P0070, P0071, P0072, and P0073.
A Note on Lincoln LS A/C Issues
While a bad ambient temp sensor can cause A/C problems, the 2000-2006 Lincoln LS is also known for other climate control issues, particularly a faulty Dual Coolant Control Valve (DCCV), which can cause hot air to blow from the vents. If you replace the sensor and still have A/C trouble, the DCCV is the next likely part to inspect.
Choosing the Right Aftermarket Sensor
For a simple part like an ambient temperature sensor, aftermarket options are generally a reliable and cost-effective choice. The technology is not complex, and the main priorities are correct fitment and a durable connector. There is no significant search data suggesting that a more expensive OEM sensor provides a major benefit for this specific part on the Lincoln LS.
Here’s a breakdown of the available brands based on general aftermarket reputation:
- Premium Aftermarket (Standard Ignition): Standard Motor Products (SMP) is a well-regarded aftermarket manufacturer, often considered a top-tier choice for electronic parts and sensors. If you want the highest confidence in an aftermarket part, this is a solid option.
- Standard Aftermarket (Dorman, Holstein): Dorman is one of the most common aftermarket brands and provides a direct-fit replacement that meets original specifications. Holstein is another brand that offers OE-equivalent parts and is a common choice for sensors. For this application, both are perfectly suitable choices.
- Value Brands (Skyward, True Tech): These brands offer the most budget-friendly path to fixing the problem. For a non-critical sensor like this, they can be a smart way to save money, as the part's function is very basic.
Cost of Replacing the Ambient Air Temperature Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Sensor | $6.47 - $53.08 |
| Shop Labor | $50 - $100 |
Pro Tip: Easy DIY Replacement
This is one of the easiest parts to replace on your Lincoln LS. The sensor is located in the front of the car, typically behind the grille, clipped to the radiator support. The job involves unplugging the old sensor, unclipping it from its mount, clipping the new one in, and plugging it back in. No special tools are needed, and it can be done in minutes, saving you the cost of shop labor.
Frequently Asked Questions
Where is the ambient air temperature sensor located on a 2000-2006 Lincoln LS?
The sensor is typically found mounted to the radiator core support, accessible from the front of the car after opening the hood. It is usually located behind the front grille.
Can I replace this sensor myself?
Yes, this is a very easy DIY job. It usually requires no tools or at most a small flathead screwdriver to release a clip. You simply disconnect the electrical connector, release the sensor from its mounting bracket, and install the new one. The entire process should take less than 15 minutes.
What happens if I don't replace a bad sensor?
You can continue to drive the car without any safety issues. However, your outside temperature display will remain incorrect, and your automatic climate control system may not function properly, which could mean no air conditioning on hot days.
Will a bad ambient temp sensor affect engine performance?
No, on the Lincoln LS, this sensor's data is primarily used for the climate control system and the dashboard display. It does not provide critical information for engine management, so a failure will not impact how the engine runs or affect fuel economy.
Are there any recalls for the Lincoln LS ambient temperature sensor?
No, there are no recalls or specific Technical Service Bulletins (TSBs) related to the ambient air temperature sensor for the 2000-2006 Lincoln LS.
Technical Specifications
OEM Part Numbers: AE5Z12A647A
2-pin plastic sensor, clip-in mount.
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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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