Chevrolet P30 Engine Intake Manifold Temperature Sensor: 1994-1999
A failing intake temperature sensor can hurt the performance and fuel economy of your 1994-1999 Chevrolet P30.
- A bad IAT sensor primarily affects fuel economy and can cause a Check Engine Light.
- Replacement is a simple, DIY-friendly task that takes less than 30 minutes.
- For this part, trusted aftermarket brands like Standard Ignition offer a reliable and cost-effective alternative to OEM.
- Ensure you order the correct sensor for your P30's specific engine (e.g., 7.4L gas vs. 6.5L diesel).
Symptoms of a Bad Intake Temperature Sensor
Because the P30 is often used for heavy-duty applications like RVs and work vans, engine performance is key. A faulty IAT sensor can cause noticeable problems. The most common signs include:
- Poor Fuel Economy: If the sensor sends a false 'cold' signal, the computer will enrich the fuel mixture, causing the engine to burn more gas or diesel than necessary.
- Check Engine Light: A malfunctioning sensor will often trigger the Check Engine Light. Common codes include P0110, P0112 (circuit low), and P0113 (circuit high).
- Rough Idle or Hesitation: The engine may run rough, hesitate during acceleration, or stall because the air-fuel mixture is incorrect for the conditions.
- Failed Emissions Test: An incorrect air-fuel ratio can lead to higher emissions, causing a failed smog check.
Choosing the Right Aftermarket Sensor
For a straightforward part like the IAT sensor on a 1994-1999 P30, you have several good options. You don't need to pay a premium for an OEM part unless you prefer to stick with the original brand.
Premium Aftermarket (ACDelco): ACDelco is the original equipment manufacturer for GM vehicles. Choosing ACDelco ensures you are getting a part with the exact same fit and performance as the one your P30 had from the factory.
Trusted Aftermarket (Standard Ignition): Standard Motor Products (SMP), sold under the Standard Ignition brand, is a well-respected manufacturer of aftermarket components. They produce a wide range of sensors that meet or exceed OEM specifications and are known for quality and reliability. This is a solid choice for a dependable replacement without the OEM price tag.
Value Brands (True Tech): True Tech appears to be a private label or re-branded part. Some parts sold under the True Tech name share part numbers with Standard Ignition, suggesting they may be sourced from the same factory. These can offer excellent value, often providing a quality component in different packaging.
Pro Tip: Check Your Engine
The Chevrolet P30 was equipped with different engines, most commonly the 7.4L V8 gas engine or the 6.5L V8 diesel. While the function of the IAT sensor is the same, the specific part and its location may differ. Always confirm the correct part for your specific engine before ordering.
Cost to Replace a P30 Intake Temperature Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Standard, True Tech) | $19.54 - $30.24 |
| New OEM (ACDelco) | $25 - $70 |
| Shop Labor | $50 - $120 |
Frequently Asked Questions (FAQ)
Where is the IAT sensor located on a Chevy P30?
The location depends on the engine. On the 6.5L diesel, it is often found in the upper intake manifold. On gas engines, it is typically screwed into the intake manifold or located in the air filter housing or intake ducting. It is a small, two-wire sensor.
Can I replace this sensor myself?
Yes, this is a very easy DIY job for most owners. It typically involves disconnecting the electrical connector, unscrewing the old sensor, and screwing in the new one. The entire process usually takes less than 30 minutes and requires only basic hand tools.
Are there any recalls or TSBs for this part?
No, a search of the National Highway Traffic Safety Administration (NHTSA) database shows no specific recalls or Technical Service Bulletins (TSBs) for the engine intake manifold temperature sensor on the 1994-1999 Chevrolet P30.
What is a common mistake when ordering this part?
A common error is confusing the Intake Air Temperature (IAT) sensor with the Engine Coolant Temperature (ECT) sensor. They can look similar and are both thermistors, but they have different functions and are not interchangeable. The IAT measures air temp, while the ECT measures coolant temp. Double-check that you are ordering the correct sensor.
Technical Specifications
OEM Part Numbers: 25037334
This is a thermistor-type sensor with a two-pin electrical connector. Its resistance changes in response to air temperature, which the ECM reads as a voltage signal.
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.
- Chevrolet P30: