1992-1998 Pontiac Trans Sport Engine Intake Manifold Temperature Sensor Guide
Is your Trans Sport running rough or getting bad gas mileage? A faulty intake air temperature sensor could be the problem.
- A bad IAT sensor is a common cause of poor gas mileage, rough idle, and hesitation on the Trans Sport.
- The Check Engine Light with codes P0112 or P0113 is a strong indicator of a failed sensor.
- Replacement is a very simple, 15-minute DIY job that requires no special tools.
- Quality aftermarket brands like Standard Ignition offer a reliable and affordable alternative to OEM parts for this sensor.
Symptoms of a Failing Intake Air Temperature Sensor
When the IAT sensor on your Pontiac Trans Sport starts to fail, it sends incorrect information to the engine's computer. This can cause a variety of noticeable problems. Here are the most common signs that your sensor may need to be replaced:
- Check Engine Light: This is often the first and most obvious sign. The computer will store a diagnostic trouble code, most commonly P0112 (Circuit Low Input) or P0113 (Circuit High Input).
- Poor Fuel Economy: If the sensor incorrectly tells the computer the air is cold, the computer will inject too much fuel, causing your gas mileage to drop.
- Rough Idle: The engine may idle unevenly, shake, or feel unstable when you're stopped.
- Hard Starting: An incorrect air temperature reading can make the engine difficult to start, especially in cold weather, because the fuel mixture is wrong.
- Engine Hesitation: You might notice a delay or sluggishness when you press the gas pedal because the computer is confused by the bad sensor data.
Cost of Replacing an IAT Sensor (1992-1998 Pontiac Trans Sport)
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $19.54 - $42.24 |
| Shop Labor | $50 - $100 |
| New OEM Part | $30 - $60 |
Choosing the Right Aftermarket Sensor
For a vehicle like the 1992-1998 Trans Sport, aftermarket IAT sensors offer excellent value. The technology for this type of sensor is well-established, and quality aftermarket brands provide reliable performance.
Standard Ignition: This is a well-regarded brand in the automotive aftermarket, known for producing parts that meet or exceed original equipment (OE) specifications. They perform extensive testing to ensure reliability and proper function. A Standard Ignition sensor is a solid choice for a dependable, long-lasting repair.
True Tech: This brand appears to be associated with auto repair shops that prioritize quality and integrity. While not as widely known as a standalone parts manufacturer like Standard, parts sold under this name are likely sourced from reputable makers to meet the standards of professional installers.
Pro Tip: For this specific part, the difference in performance between a premium aftermarket brand and a budget one is minimal. Both Standard Ignition and True Tech are suitable options. The key is to ensure the part has a good warranty and fits your vehicle correctly.
Frequently Asked Questions (FAQ)
Where is the IAT sensor located on a 1992-1998 Pontiac Trans Sport?
On GM vehicles from this era, including those with the 3.1L, 3.4L, and 3.8L V6 engines used in the Trans Sport, the IAT sensor is typically a small, two-wire sensor pushed into a rubber grommet on the air intake duct. You will find it between the air filter box and the engine's throttle body.
Is this a difficult part to replace myself?
No, this is a very easy DIY job. It usually takes less than 15 minutes and requires no special tools. You simply locate the sensor, unplug the electrical connector, and carefully pull the old sensor out of the intake tube. Then, you push the new one in and reconnect the electrical plug.
Can I just clean the IAT sensor instead of replacing it?
If the sensor is just dirty with oil or debris, you can try cleaning it with a dedicated Mass Airflow (MAF) or electronics cleaner. However, if the sensor has failed internally, cleaning will not fix the problem and it will need to be replaced. Given the low cost of a new part, replacement is often the most reliable solution.
Are there any recalls for the IAT sensor on the Pontiac Trans Sport?
No, there are no specific recalls for the Intake Air Temperature sensor on the 1992-1998 Pontiac Trans Sport. While there were several recalls for these model years, none of them pertain to this specific component.
Technical Specifications
OEM Part Numbers: 12160244 12110319
Two-terminal thermistor sensor that pushes into a rubber grommet in the air intake duct.
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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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