Jeep Wrangler (2015-2019) Intake Manifold Temperature Sensor Guide
Is a faulty intake temperature sensor causing your Jeep to run poorly? Here's what you need to know.
- A bad IAT sensor on your Wrangler will most often trigger a P0113 check engine light code.
- Symptoms include poor fuel economy, rough idle, and hesitation.
- Replacement is a very simple DIY job that takes less than 15 minutes and requires minimal tools.
- On the 3.6L engine, this is a separate sensor located in the air intake tube, not part of the MAP sensor.
Understanding the Intake Air Temperature Sensor on Your Wrangler
The Intake Air Temperature (IAT) sensor is a small but crucial part of your Jeep's engine management system. It acts like a thermometer, telling the engine's computer how dense the incoming air is. Colder air is denser and has more oxygen, so the computer adds more fuel to maintain the correct air-fuel ratio. When this sensor fails, it can send incorrect information, leading to a range of engine performance problems. For the 2015-2019 Jeep Wrangler (JK and JL generations), this sensor is a simple, two-wire, twist-lock component located in the plastic air intake duct.
Symptoms of a Failing IAT Sensor
A bad IAT sensor can cause several noticeable issues. The most common sign is the Check Engine Light illuminating on your dashboard. You might also experience a noticeable drop in fuel economy, as the engine's computer may default to a rich fuel mixture to be safe. Other symptoms include a rough or erratic idle, hesitation during acceleration, and in some cases, difficulty starting the engine, especially when it's cold.
Can I Drive with a Bad IAT Sensor?
Yes, but it's not recommended for long. Your Jeep will likely enter a default mode, resulting in poor fuel mileage and reduced engine performance. Ignoring the issue could potentially lead to more significant problems over time due to an incorrect air-fuel mixture.
Choosing the Right Aftermarket Sensor
When replacing the IAT sensor, you have the choice between an OEM Mopar part and an aftermarket brand like Standard Ignition. For a simple electronic sensor like this, a quality aftermarket part often provides the same performance as the original for a lower price. Standard Ignition is a well-known brand that produces reliable replacement sensors. Since this is not a complex mechanical part, an aftermarket sensor is a practical and cost-effective choice for most owners.
| Part Type | Estimated Cost |
|---|---|
| New OEM (Mopar) | $33 - $49 |
| New Aftermarket (Standard Ignition) | $22.73 - $37.60 |
| Shop Labor | $48 - $95 |
Pro Tip: Easy DIY Replacement
Replacing the IAT sensor is one of the easiest repairs you can do on your Wrangler. It requires no special tools—just a flathead screwdriver to loosen the air intake clamp. The sensor itself simply twists and pulls out. The entire job can be done in under 15 minutes, saving you shop labor costs.
Frequently Asked Questions (FAQ)
Where is the IAT sensor located on a 2015-2019 Jeep Wrangler?
The sensor is located on the underside of the main air intake tube (snorkel), between the air filter box and the engine's throttle body. You can access it by loosening the worm clamp on the throttle body side and lifting the tube slightly.
Is the IAT sensor the same as the MAP sensor on this Jeep?
No. On the 3.6L Pentastar engine used in the 2015-2019 Wrangler, the Intake Air Temperature (IAT) sensor and the Manifold Absolute Pressure (MAP) sensor are two separate components. The IAT is in the air intake tube, while the MAP sensor is typically mounted on the intake manifold itself.
What are the common trouble codes for a bad IAT sensor?
The most common Diagnostic Trouble Code (DTC) is P0113, which indicates a high voltage signal from the sensor circuit. You might also see P0111 (range/performance issue) or P0112 (low voltage signal).
Are there any recalls for the IAT sensor on the 2015-2019 Wrangler?
No, there are no specific recalls issued by the NHTSA for the Intake Air Temperature sensor on the 2015-2019 Jeep Wrangler models.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5149182AB 5149182AA
Two-pin, twist-lock sensor that measures air temperature via resistance (NTC Thermistor).
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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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