Pontiac Aztek Engine Intake Manifold Temperature Sensor Guide (2001-2005)
Fix your Aztek's rough idle and poor gas mileage by understanding this simple but important sensor.
- A bad IAT sensor is a common cause for a Check Engine Light with codes P0112 or P0113.
- Replacement is extremely easy and a great DIY job for any skill level, taking only a few minutes.
- For this part, a reputable aftermarket brand like Standard Ignition offers OEM quality at a better price.
- Symptoms primarily include poor fuel economy, rough idle, and engine hesitation.
Is Your Aztek's Intake Air Temperature Sensor Failing?
A bad Intake Air Temperature (IAT) sensor on a 2001-2005 Pontiac Aztek can cause engine problems that are frustrating but usually easy to fix. Because the sensor is inexpensive and simple to replace, it's a common part to check when you have a Check Engine Light on. The signs of failure are often related to how the engine runs and its fuel usage.
Common Symptoms of a Bad IAT Sensor
When this sensor fails, your Aztek's computer gets bad information and can't properly manage the engine. Here’s what you might notice:
- Check Engine Light: This is the most common sign. The computer will log a trouble code, usually P0112 or P0113, which points to a problem with the sensor's circuit.
- Poor Fuel Economy: If the sensor tells the computer the air is colder than it really is, the computer will inject too much fuel, wasting gas.
- Rough Idle: An incorrect air-fuel mixture can make the engine idle unevenly or feel shaky when you're stopped.
- Engine Hesitation: Your Aztek might hesitate or stumble when you press the gas pedal because the engine isn't getting the right fuel mixture for the power demand.
- Failed Emissions Test: An improper air-fuel ratio will increase harmful emissions, likely causing your vehicle to fail a smog check.
How to Choose the Right Aftermarket Sensor
For a simple sensor like this on the Aztek, you don't need to spend a lot of money on a factory part. Aftermarket brands offer good quality for a much lower price. The key is choosing a brand with a good reputation.
Based on what's available for the 2001-2005 Aztek, here is a breakdown of the common brand tiers:
- Tier 1: Reputable Aftermarket (Recommended)
Brands like Standard Ignition (Standard Motor Products) are a solid choice. They have been making quality electronic parts for decades and are trusted by professional mechanics. These parts are designed to fit and work just like the original and offer a reliable, long-lasting repair without the high cost of a dealer part. - Tier 2: Economy Brands
Brands like True Tech fall into this category. While they offer the lowest price, their quality can be less consistent. These brands are often private labels and may not have the same level of testing and materials as more established companies. For a critical sensor, it's often worth spending a few extra dollars for a brand with a proven track record.
Cost to Replace Your Aztek's IAT Sensor
| Part Type | Estimated Part Cost | Estimated Labor Cost |
|---|---|---|
| New OEM (AC Delco) | $20 - $30 | $50 - $75 |
| New Aftermarket | $19.54 - $22.41 |
Cost estimates are for reference only and may vary by location and supplier. The aftermarket price reflects the specified inventory range.
Frequently Asked Questions (FAQ)
Where is the intake air temperature sensor on a 2001-2005 Pontiac Aztek?
The IAT sensor is located in the flexible black rubber air intake duct. It is situated between the air filter box and the engine's throttle body. It's a small, two-wire sensor that simply pushes into a hole in the duct.
Can I replace the IAT sensor myself?
Yes, this is one of the easiest repairs you can do. It requires no special tools. You simply unplug the electrical connector, pull the old sensor out of the intake tube, push the new one in, and reconnect the plug. The entire job takes less than 5 minutes.
What happens if I don't replace a bad IAT sensor?
You can still drive the vehicle, but you will experience symptoms like poor gas mileage, rough running, and hesitation. Your Check Engine Light will stay on, and you will not be able to pass an emissions test. Ignoring it long-term can put extra stress on other components like the catalytic converter.
Is the Intake Air Temperature sensor the same as the Coolant Temperature sensor?
No, they are two different sensors that do different jobs. The IAT sensor measures air temperature, while the Engine Coolant Temperature (ECT) sensor measures the temperature of the engine's coolant. Both are important, but they are separate parts in different locations.
Are there any recalls for the Aztek IAT sensor?
No, there are no recalls or common Technical Service Bulletins (TSBs) from General Motors for the intake air temperature sensor on the 2001-2005 Pontiac Aztek.
Technical Specifications
OEM Part Numbers: 12160244 25037352 12110319
2-Terminal, Plug-in Sensor
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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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