Chevrolet G30 Engine Intake Manifold Temperature Sensor (1994-1996)
Understanding and replacing the intake air temperature sensor in your 1994-1996 Chevy G30 van.
- A bad intake temperature sensor will cause poor fuel economy, rough running, and a Check Engine Light with codes like P0112 or P0113.
- This is an easy and inexpensive DIY repair that most owners can complete in under 30 minutes with basic tools.
- Quality aftermarket brands like Standard Ignition offer a reliable and affordable alternative to more expensive OEM parts for this sensor.
- No recalls have been issued for this specific part on the 1994-1996 Chevrolet G30.
Symptoms of a Failing Intake Temperature Sensor
A bad intake air temperature sensor can cause several noticeable problems with your van's performance. Because the engine's computer gets incorrect information, it can't properly adjust the fuel and air mixture. This can lead to a variety of driveability issues.
🎬 Watch this video to see common symptoms of a bad sensor.Common Failure Symptoms
- Poor Fuel Economy: The computer may inject more fuel than needed, wasting gas.
- Rough Idle: Your van's engine might idle unevenly or feel shaky when stopped.
- Hard Starting: The engine may have trouble starting, especially in cold weather, because the fuel mixture isn't right for the conditions.
- Hesitation or Lack of Power: You might feel a delay or sluggishness when you press the gas pedal.
- Check Engine Light: The most common sign is an illuminated Check Engine Light. The computer will store a trouble code, often P0112 or P0113. 🎬 Learn how to fix specific IAT trouble codes in this guide.
Choosing the Right Aftermarket Sensor
For an older workhorse like the 1994-1996 G30, you don't necessarily need to pay for an expensive OEM (Original Equipment Manufacturer) part from the dealer. A quality aftermarket sensor is a reliable and cost-effective choice for this repair. The technology for this type of sensor is well-established, and aftermarket brands produce dependable replacements.
Brand Quality Tiers:
- Standard Ignition (Standard Motor Products): Often considered a professional-grade aftermarket brand, Standard Ignition parts are known for their quality and reliability. They manufacture a wide range of sensors and undergo extensive testing. This is a solid choice for a dependable, long-lasting repair.
- True Tech: Information on "True Tech" as a parts manufacturer is limited; it appears to be more associated with names of repair shops. When shopping, you may encounter various store-brand or value-line parts. For a simple sensor like the IAT, these can be a budget-friendly option, though they may not have the same reputation for longevity as a brand like Standard Ignition.
Pro-Tip: Check the Connector First!
Before you buy a new sensor, take a close look at the old one. The problem is often a loose connection, or corrosion or dirt on the electrical connector or the sensor tip. Sometimes, simply cleaning the sensor and ensuring the connector is secure can solve the problem and save you the cost of a new part.
🎬 See how a faulty IAT sensor affects your engine's performance.Cost of Replacing the Intake Temperature Sensor
The cost to replace the intake temperature sensor on a '94-'96 G30 is very reasonable, especially if you do the work yourself. The part itself is inexpensive, and the job is straightforward.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Sensor | $19.54 - $30.24 |
| Estimated Shop Labor | $50 - $100 |
| Total Estimated Cost (Shop Repair) | $70 - $130 |
Frequently Asked Questions (FAQ)
Where is the intake temperature sensor located on my 1994-1996 G30?
On GM trucks and vans from this era, the Intake Air Temperature (IAT) sensor is typically screwed into the intake manifold or located in the air intake ducting after the air filter. For the V8 engines in the G30, look for a small, two-wire sensor on the intake manifold itself.
Can I replace this sensor myself?
Yes, this is a very DIY-friendly repair. The sensor is usually easy to access. The process involves unplugging the electrical connector, unscrewing the old sensor, and then screwing in the new one and reconnecting the plug. It typically requires only basic hand tools and can be done in under 30 minutes.
What happens if I don't replace a bad sensor?
While a bad IAT sensor won't usually stop your van from running, it will cause it to run poorly. You will likely experience reduced fuel economy, poor performance, and higher emissions. Over time, running with an incorrect fuel mixture isn't ideal for engine health, and you won't be able to pass an emissions test with the Check Engine Light on.
Are there any recalls for the G30 intake temperature sensor?
No, there are no specific recalls or technical service bulletins (TSBs) from GM or the NHTSA for the Intake Air Temperature sensor on the 1994-1996 Chevrolet G30. While there are recalls for other issues on these vans, the IAT sensor is not among them.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12160244 8121103190
Typically a two-terminal, screw-in sensor with a 3/8" - 18 NPTF thread size. It functions as a thermistor, changing its electrical resistance based on air temperature.
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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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