Diagnosing a Bad or Failing Ambient Temperature Sensor

When the ambient temperature sensor in your car stops working, you may not notice it right away, not until you catch a glimpse of the outside temperature reading or realize the air coming from the vents isn’t as cold as it should be. We can diagnose a failing ambient temperature sensor for you and replace it quickly.

Very inaccurate outside temperature readings, visible damage to the ambient temperature sensor itself, and a glowing check engine light are all signs of a bad ambient temperature sensor. We can know for sure if that’s the problem by performing a “multimeter” test on the sensor and checking its efficacy. Replacing an ambient temperature sensor shouldn’t take long, so don’t put it off.

Call AAA Radiator and Auto Air Conditioning at (305) 909-6127 for car A/C repair today.

How Can You Diagnose a Bad or Failing Ambient Temperature Sensor in Your Car?

If it’s never broken before, you may not know what the ambient temperature sensor in your car does, where it’s located, or how to tell if it’s failing without our mechanics’ help. Start by checking the outside temperature display to see if it’s accurate. If it’s not, visit us for a multimeter test and sensor replacement.

Check Outside Temperature Display

If your car’s ambient temperature sensor is broken or failing, the outside temperature display will most likely be incorrect. If the sensor is failing, the external temperature reading may be off by just a few degrees. If the ambient temperature sensor is broken, the outside temperature could register as low as -40°F or as high as 100°F.

The ambient temperature sensor measures outdoor temperature, so the reading will be incorrect if it’s broken.

Inspect the Ambient Temperature Sensor

You can also check the sensor itself for any visible damage, cracks, or broken wires. The ambient temperature sensor is typically located behind the front bumper or grille of a car. It’s very small, so you might not be able to locate it yourself; you can rely on our mechanics to inspect the sensor and check for physical damage.

Especially if you were recently in an accident, the small, plastic sensor could have snapped off.

See if the Check Engine Light is On

A broken ambient temperature sensor can trigger your car’s check engine light, as can countless other internal issues within the vehicle. A check engine light isn’t the biggest sign of a broken ambient temperature sensor, but it’s a better indication when the outdoor temperature display shows an inaccurate reading.

Have Our Mechanics Perform a Multimeter Test

Experienced mechanics can confirm whether your car’s ambient temperature sensor is bad by performing a multimeter test to measure its resistance at different temperatures. The ambient temperature sensor needs to be removed from your car to test its efficacy. Be safe: take your car to the shop for these tests; don’t try them yourself at home.

Who Can Diagnose a Bad or Failing Ambient Temperature Sensor?

Ambient temperature sensors aren’t car parts most drivers are familiar with. These sensors aren’t necessarily safety-critical, nor do they really affect your car’s engine. Drivers who don’t know what an ambient temperature sensor is, let alone how to identify it, can rely on our mechanics for the right diagnosis.

Tell us the problems you’re experiencing with your car and its A/C system, and we can diagnose the issue. A broken ambient temperature sensor could be one possibility, or there could be a larger issue with the entire air conditioning system.

Avoid unnecessary and expensive repairs by letting us find the real problem, like a faulty ambient temperature sensor, and address it right away.

FAQs About Bad or Failing Ambient Temperature Sensors

How Often Do You Have to Replace Ambient Temperature Sensors in Cars?

Ambient temperature sensors are not replaced regularly, as they are not subject to the wear-and-tear of a car. If they fail, however, they need to be replaced so you can get an accurate outside temperature reading and avoid damage to your air conditioning system.

How Long Does it Take to Replace a Car’s Bad or Failing Ambient Temperature Sensor?

Replacing a bad or failing ambient temperature sensor is a very quick process and should take less than an hour in most cases.

Can You Diagnose a Bad or Failing Ambient Temperature Sensor Yourself?

If you suspect a bad or failing ambient temperature sensor, we can confirm your suspicions by getting the multimeter testing that only experienced mechanics can perform and assess.

Can Your Car Have AC Issues from a Bad or Failing Ambient Temperature Sensor?

A bad or failing ambient temperature sensor can affect your car’s A/C system over time, preventing it from engaging due to inaccurate outside temperature readings. Auto and climate control settings heavily rely on the ambient temperature sensor, making replacement important.

What Causes a Bad or Failing Ambient Temperature Sensor in a Car?

Broken and failing ambient temperature sensors are caused by physical damage during accidents, debris, corrosion, moisture, and broken wiring.

What Are the Top Signs of a Bad or Failing Ambient Temperature Sensor in Your Car?

Some of the top signs of a bad or failing ambient temperature sensor in your car are inaccurate outside temperature readings, A/C system failure, and the check engine light.

Can You Drive with a Bad or Failing Ambient Temperature Sensor in Your Car?

Driving with a bad or failing ambient temperature sensor in your car isn’t necessarily unsafe. Still, it can be inconvenient if it affects your car’s A/C and climate control features, and it is always worth the little time it takes to repair or replace.

Call Us for AC Repairs Today

For auto air conditioning repair, replacement, and other services, call AAA Radiator and Auto Air Conditioning at (305) 909-6127 today.