2013-2021 Buick Enclave Ambient Air Temperature Sensor Guide
Is your Enclave's A/C acting up or showing the wrong outside temperature? It could be a bad ambient air temperature sensor.
- A bad ambient air temperature sensor is a primary cause of incorrect temperature displays and automatic A/C problems on the Buick Enclave.
- Before replacing the sensor, always inspect the wiring connector for signs of corrosion, as noted in a GM service bulletin.
- Replacement is simple and can be done at home in under 30 minutes with basic tools.
- Both OEM and quality aftermarket brands like Standard Ignition are affordable and effective solutions for this repair.
Is Your Buick Enclave A/C Not Working Right?
A failing ambient air temperature sensor is a common reason for climate control problems in the 2013-2021 Buick Enclave. When this sensor stops working, it can leave you with an A/C that doesn't cool or a heater that won't warm up when using the 'Auto' setting. Recognizing the symptoms can help you pinpoint the problem quickly.
Common Failure Symptoms:
- Incorrect Outside Temperature Display: The temperature shown on your dash might be stuck on an extremely high or low number, like -40°F or 120°F, regardless of the actual weather.
- Automatic Climate Control Fails: The 'Auto' setting for your HVAC system may not work at all or will blow air at the wrong temperature. You might find you can only control the temperature manually.
- Check Engine Light: A faulty sensor can trigger the Check Engine Light. You may see diagnostic trouble codes (DTCs) such as P0071, P0072, P0073, or P0074 when the vehicle is scanned.
Known Issue: Check for Corrosion First
General Motors issued a Technical Service Bulletin (TSB 16-NA-051) that applies to similar vehicles and problems. It warns that moisture can get into the sensor's wiring harness, causing corrosion. This corrosion can cause the sensor to fail and trigger a Check Engine Light. Before replacing the sensor, inspect the wiring connector for any green or white crusty buildup. If you see corrosion, the wiring harness may need to be replaced along with the sensor.
Choosing the Right Aftermarket Sensor
For the Buick Enclave, you don't need to buy an expensive OEM part from the dealer. Aftermarket options are affordable and get the job done. However, quality can differ between brands.
- Standard Ignition (SMP): Often considered a higher-quality aftermarket brand. Forum users report that SMP parts are reliable, and in some cases, may even be the same as the original part but in a different box. This is a solid choice for reliability.
- Dorman: A widely available brand that offers direct-fit replacement parts. While convenient, online reviews from mechanics and DIYers are mixed, with some reporting quality control issues. It's a budget-friendly option, but it's a good idea to inspect the part carefully before installation.
Pro Tip: Another GM bulletin (PI0233C) notes that it's normal for the temperature display to be slow to update after starting the car or to read high in direct sun or heavy traffic. Don't replace the sensor if this is the only issue you notice.
Cost of Replacing the Ambient Air Temperature Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $13 - $15 |
| New OEM (GM Genuine) | $10 - $17 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions (FAQ)
Where is the ambient air temperature sensor located on a 2013-2021 Buick Enclave?
The sensor is typically located at the front of the vehicle, behind the grille or near the front bumper. This position allows it to measure the temperature of the air as you drive.
Can I replace this sensor myself?
Yes, this is a very DIY-friendly repair. Accessing the sensor may require removing a few plastic clips or screws on the grille or radiator support cover. The sensor itself usually just unplugs from its wiring harness and unclips from its bracket. The entire job can often be done in under 30 minutes with basic hand tools.
What does Check Engine Code P0073 mean?
P0073 means "Ambient Air Temperature Sensor Circuit High Input." This code is logged when the vehicle's computer receives a signal from the sensor that is higher than the normal operating range, which usually points to a faulty sensor or a wiring problem.
Do I have to buy an OEM sensor?
No, it's not necessary. For this part, the OEM price is very close to the aftermarket price. However, quality aftermarket brands like Standard Ignition offer reliable performance and are a perfectly acceptable choice. Given the low cost, either a new OEM or a reputable aftermarket part is a good option.
Helpful Videos
Technical Specifications
OEM Part Numbers: 25775833 13589747 13529378 13507317 13545621
Typically a two-pin thermistor sensor located behind the front grille.
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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.
- Buick Enclave: