Symptoms of a Bad or Failing Air Charge Temperature Sensor

Virtually all modern vehicles run using a computer controlled engine management system. The engine computer receives data from various sensors to regulate and adjust the fuel mixture of that engine so that the vehicle can stay running in peak condition. One of these sensors is the air charge temperature sensor, also known as the intake air temperature sensor.

This sensor measures the temperature of the air coming into the engine. As cold air is much more dense than hot air, the measurement from this sensor allows the computer to make the correct adjustments necessary for the engine to stay running smoothly under all conditions. Usually, when the air charge temperature sensor fails it will display a few symptoms that can alert the driver of a potential problem that should be inspected.

1. Lack of power when accelerating

One of the first symptoms that a vehicle will display when the air charge temperature sensor has failed is a noticeable reduction in power when accelerating. A bad or failing sensor will not send the correct signal to the computer which will negatively affect the computer’s air / fuel mixture calculations.

2. Trouble with cold starts

Another symptom of a bad or defective air charge temperature sensor is difficulty starting in cold conditions. The air charge temperature sensor sends a signal to the computer during cold conditions that allow the computer to provide additional fuel required during cold starts. A failing or defective sensor will not be able to send the correct signal to the ECU (engine control unit), which can result in increased difficulty when cold starting a vehicle.

3. Decrease in fuel efficiency

Another symptom of a bad or defective air charge temperature sensor is a noticeable decrease in fuel efficiency. The air charge temperature sensor sends data to the computer, which allows it to make continuous adjustments to the engine’s air / fuel mixture for maximum fuel efficiency. Any problems with the sensor can result in incorrect calculations by the ECU, which may result in a decrease in fuel efficiency.

The air charge temperature sensor plays an important part in the vehicle’s engine management system. Because it’s signal can impact engine performance, if you suspect that your air charge temperature sensor is failing or defective, then have a professional technician, such as one from YourMechanic, test it and if necessary replace the sensor to restore vehicle performance.


Schedule Vehicle Engine Electrical Inspection
Service Area

$0.00

Upfront, Transparent Price
Average rating from 138,639 customers who received a Vehicle Engine Electrical Inspection.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Excellent Auto Repair Ratings.

4.2 Average Rating

Auto Repair

Service Hours

7 AM - 9 PM

7 days a week

Phone Number

Phone Hours

Mon - Fri / 6 AM - 5 PM PST

Sat - Sun / 7 AM - 4 PM PST

Address

We come to you at no extra charge

Guarantee

12-month/12,000-mile warranty

Service Area

Recent Vehicle Engine Electrical Inspection reviews

Excellent Rating


YourMechanic Vehicle Engine Electrical Inspection Service

Average Rating

4.9/5

Number of Reviews

138,639

Rating Summary
129,677
4,969
991
699
2,303
129,677
4,969
991
699
2,303

Patrick

32 years of experience
1148 reviews
Patrick
32 years of experience
Mazda 3 - Exterior Door Handle Replacement (Driver Side Front) - Austin, Texas
did the job
Hyundai Sonata - Door Mirror Replacement (Driver Side) - Austin, Texas
He was very efficient, nice and professional. Would highly recommend

Ronnie

29 years of experience
28 reviews
Ronnie
29 years of experience
Dodge Charger - Vehicle Engine Electrical Inspection - Nashville, Tennessee
He did a great job with my car and fixed some issues I couldn't figure out for awhile now!

Michael

37 years of experience
120 reviews
Michael
37 years of experience
Ford E-350 Super Duty - Vehicle Engine Electrical - Placentia, California
Very knowledgeable on time great Tech.

Kenneth

19 years of experience
579 reviews
Kenneth
19 years of experience
Ford Taurus - Vehicle Engine Electrical - Los Angeles, California
Kenneth performed excellent, conscientious service.

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE