Dodge Charger Intake Air Temperature Sensor Guide: 1985-1993
Is a faulty air temperature sensor causing engine problems in your 1985-1993 Dodge Charger? Here’s what you need to know.
- The Intake Air Temperature (IAT) sensor is critical for proper fuel mixture on 1985-1993 Chargers.
- Symptoms of failure include poor MPG, rough idle, hard starting, and a Check Engine Light (P0113).
- Replacement is simple, inexpensive, and can be done with basic hand tools in under 30 minutes.
- A quality aftermarket brand like Standard Ignition is a reliable and cost-effective choice for this repair.
Diagnosing a Failing Intake Air Temp Sensor in Your Charger
The 1985-1993 Dodge Charger relies on a "speed density" fuel injection system where the Intake Air Temperature (IAT) sensor plays a crucial role. When this sensor starts to fail, it sends incorrect information to the engine computer, which can lead to a variety of noticeable engine performance issues. Because the computer can't correctly calculate the air-fuel mixture, you may experience problems that seem more serious than they are.
Symptoms of a Bad IAT Sensor
A failing IAT sensor can mimic other fuel or ignition problems. Here are the most common signs to watch for:
- Check Engine Light: A faulty IAT sensor will often trigger the Check Engine Light. An OBD-II scanner may show a code like P0113, which indicates a high voltage reading from the sensor's circuit.
- Poor Fuel Economy: If the sensor incorrectly tells the computer the air is cold, the engine will run rich (too much fuel), causing you to use more gas.
- Rough Idle: An imbalanced air-fuel mixture can cause the engine to idle erratically or surge.
- Hard Starting: Especially in cold weather, a bad sensor can prevent the computer from providing the richer mixture needed to start the engine easily.
- Engine Hesitation or Stalling: Incorrect fuel mixture can cause the engine to stumble or hesitate during acceleration.
- Black Exhaust Smoke: This is a clear sign that the engine is running too rich, which can happen if the sensor is stuck reading a very cold temperature.
Aftermarket Part Cost: 1985-1993 Dodge Charger
| Part | Brand | Our Price Range |
|---|---|---|
| Engine Intake Manifold Temperature Sensor | Standard Ignition | $20.06 - $30.50 |
Choosing the Right Aftermarket Sensor
For a vehicle like the 1985-1993 Charger, aftermarket parts are often the only option available, as OEM parts may be discontinued. Fortunately, brands like Standard Ignition (also known as SMP) have a long history of producing reliable replacement components.
Standard Ignition (AX1): Standard is a well-regarded aftermarket manufacturer that produces a wide range of sensors. Their parts are designed to meet or exceed original specifications and are 100% factory tested. For a simple but critical sensor like the IAT, a quality aftermarket part from a reputable brand like Standard is a dependable and cost-effective choice. There is no significant performance difference to justify searching for a rare and expensive New Old Stock (NOS) Mopar part.
Pro Tip: Installation
Replacing the IAT sensor is typically a simple job. It is usually threaded directly into the intake manifold. The process involves disconnecting the electrical connector, unscrewing the old sensor, and screwing the new one in its place. No special tools are required beyond a basic wrench, and it can often be done in under 30 minutes.
Known Issues, Recalls, and TSBs
Searches for official recalls and Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) did not reveal any specific issues related to the Intake Air Temperature Sensor for the 1985-1993 Dodge Charger. While some general emissions-related recalls were issued for these model years, none pointed to this specific sensor as the cause. Given the age of the vehicle, most known issues are based on general component wear rather than specific manufacturing defects.
Frequently Asked Questions (FAQ)
Where is the IAT sensor located on a 1985-1993 Charger?
The Intake Air Temperature sensor is typically screwed into the engine's intake manifold, where it can accurately measure the temperature of the air just before it enters the cylinders.
Can I clean the IAT sensor instead of replacing it?
While some sensors can be cleaned, the IAT is a thermistor sealed inside a housing. If it has failed electrically, cleaning will not fix it. Given the low cost of a new aftermarket sensor, replacement is the recommended and most reliable repair.
Is an "Air Charge Temperature Sensor" the same as an IAT sensor?
Yes, the terms Intake Air Temperature (IAT) sensor, Air Charge Temperature sensor, and Manifold Temperature sensor are often used interchangeably for this part. They all refer to the sensor that measures the temperature of the air entering the engine.
What happens if I ignore a bad IAT sensor?
Ignoring a bad IAT sensor can lead to persistently poor fuel economy, failed emissions tests, and long-term damage to your catalytic converter from a constantly rich fuel mixture. It can also make the car difficult to drive due to rough idling and hesitation.
Technical Specifications
OEM Part Numbers: 4300251 4111482 33004280
This is a two-wire thermistor sensor that threads into the intake manifold. It changes resistance based on air temperature to send a voltage signal to the engine computer.
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.
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