A Guide to the Fuel Tank Pressure Sensor for the 2008-2018 Buick Enclave
If you have a Check Engine Light, this sensor on your Buick Enclave is a common reason why.
- Replacement is a difficult, labor-intensive job because the fuel tank must be dropped to access the sensor.
- Due to the high labor cost, use a top-tier brand like ACDelco or Standard Ignition to ensure reliability and avoid a repeat repair.
- The main symptom is a Check Engine Light with EVAP codes like P0451, P0452, or P0453.
- Do not confuse this part with the Fuel Rail Pressure Sensor, which is located on the engine.
Is a Bad Fuel Tank Pressure Sensor a Problem on the Buick Enclave?
A failing fuel tank pressure sensor is a common issue that will trigger the Check Engine Light on many vehicles, including the 2008-2018 Buick Enclave. While the part itself isn't a frequent failure item compared to a gas cap, its symptoms are often the first sign of an EVAP system problem. The main issue for Enclave owners is the sensor's location. It sits on top of the fuel tank, which means the tank must be lowered for replacement. This makes the repair labor-intensive.
Symptoms of a Failing Fuel Tank Pressure Sensor
The signs of a bad fuel tank pressure sensor are almost always related to the EVAP system. You will likely not notice any major driving problems, but your vehicle will not be compliant with emissions standards.
- Check Engine Light: This is the most common and often the only symptom. The light will be triggered by specific diagnostic trouble codes related to the EVAP system.
- EVAP Trouble Codes: Common codes include P0451, P0452, P0453, and P0454, which point directly to the sensor's voltage or performance. You might also see general EVAP leak codes. 🎬 Watch this guide to troubleshoot EVAP codes before starting repairs.
- Failed Emissions Test: Because the sensor is a key part of the emissions system, a faulty one will cause your Enclave to fail an emissions inspection.
- Difficulty Fueling: You may notice the gas pump nozzle clicking off repeatedly when you try to fill the tank. This happens because the system isn't venting pressure correctly.
- Fuel Smell: In some cases, a bad sensor can lead to fuel vapors escaping, causing a gasoline odor around the vehicle.
Common Ordering Mistake
Do NOT confuse the Fuel Tank Pressure Sensor with the Fuel Rail Pressure Sensor. The tank sensor is for the emissions system and is on the fuel tank. The rail sensor is part of the fuel injection system and is on the engine. They are different parts with different functions.
🎬 See how to replace the fuel rail sensor on the engine.Choosing the Right Aftermarket Brand
Because replacing this sensor requires dropping the fuel tank, the labor cost is high. To avoid doing this expensive job twice, it is critical to choose a high-quality, reliable replacement part. This is not the place to save a few dollars on a cheap, unknown brand.
- Tier 1 (Best Quality): ACDelco is the original equipment (OE) manufacturer for GM. Choosing ACDelco ensures a perfect fit and original performance. Standard Ignition (Standard Motor Products) is a top-tier aftermarket brand, widely respected for producing parts that meet or exceed OEM quality.
- Tier 2 (Good Quality): Walker Products specializes in fuel and emission components and is a solid choice. Brands like Bosch and NTK also have a good reputation for sensors.
- Tier 3 (Economy): Brands like Global Parts (GPD) or other lesser-known names are more of a risk. Given the high labor cost for this specific repair, sticking with Tier 1 or Tier 2 brands is strongly recommended.
Known Issues, Recalls, and Service Bulletins
- Safety Recall 18159: This recall applies to some 2018 Buick Enclave models. It warns that the sensor could be damaged during a severe rear-end collision, potentially causing a fuel leak. The fix involves dealers installing a special shield for the sensor.
- Technical Service Bulletin (TSB) 22-NA-203: This TSB notes that overfilling the fuel tank (going past three clicks of the pump nozzle) can force liquid fuel into the vapor lines. This can block the lines and cause a P0451 code, mimicking a sensor failure. The fix is to have a technician clear the lines of fuel.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Part | $50 - $92 |
| New OEM Part | $55 - $105 |
| Shop Labor | $204 - $299 |
| Total Estimated Cost | $254 - $401 |
Pro Tip for DIY Replacement
This is an advanced DIY project. You must be comfortable and safe while lowering a fuel tank, which may contain gasoline. Always work in a well-ventilated area and take all necessary safety precautions. A video guide shows the process involves supporting the tank, removing the straps, and carefully lowering it just enough to access the sensor on top of the fuel pump module. 🎬 Watch a mechanic demonstrate the fuel tank drop and sensor replacement. If you are not an experienced mechanic, this job is best left to a professional.
Frequently Asked Questions
Can I still drive my Enclave with a bad fuel tank pressure sensor?
Yes, you can usually drive the vehicle. A bad FTP sensor typically does not cause major performance issues. However, your Check Engine Light will stay on, and you will not be able to pass an emissions test.
Is it hard to replace the fuel tank pressure sensor on a Buick Enclave?
Yes, it is a difficult job for a DIYer. The sensor is on top of the fuel tank, so the tank must be partially or fully removed to gain access. This makes the repair labor-intensive and is why professional installation is often recommended.
Could my loose gas cap be the real problem?
Absolutely. Before replacing the sensor, always check that your gas cap is tight and the seal is not cracked or worn. A faulty gas cap is a very common cause for EVAP codes and is much cheaper and easier to fix.
What is the difference between the fuel tank sensor and the fuel rail sensor?
They are completely different parts. The fuel tank pressure sensor measures air pressure for the EVAP emissions system. The fuel rail pressure sensor measures liquid fuel pressure for the engine's injection system and is located on the engine itself. Make sure you order the correct part for your repair.
Helpful Videos
Technical Specifications
OEM Part Numbers: 13502903 16238399 19540725 16217059 16257276
3-pin electrical connector, mounts on top of fuel pump module.
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.
- Buick Enclave: