P0073 OBD-II Trouble Code: Ambient Air Temperature Sensor Circuit High input

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0073 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0073 code

P0073 is a diagnostic trouble code (DTC) for "Ambient Air Temperature Sensor Circuit High input". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0073 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0073 code definition

Ambient Air Temperature Sensor Circuit High input

Depending on the type of vehicle these are some related OBD-II Diagnostic Trouble Codes:

  • P0070: Ambient Air Temperature Sensor Circuit
  • P0071: Ambient Air Temperature Sensor Range/Performance
  • P0072: Ambient Air Temperature Sensor Circuit Low Input

What the P0073 code means

The Power Control Module (PCM) uses information that it receives from the ambient air temperature sensor to regulate the levels of the ambient air temperature and intake air temperature.

If the ambient air temperature reaches a level above that of the intake air temperature, the Power Control Module (PCM) will store the P0073 trouble code and the Check Engine Light will come on.

What causes the P0073 code?

There are several things that could cause the P0073 trouble code to be stored by the Power Control Module (PCM):

  • The ambient air temperature sensor has malfunctioned
  • The wiring has shorted or broken
  • There is corrosion in the electric circuitry or connector
  • A break or short in the ambient air temperature harness
  • Debris that is covering the sensor

What are the symptoms of the P0073 code?

The biggest indication of a problem with the ambient air temperature system is that the Check Engine Light is on. In certain cases, the climate control system (heat and/or air condition controls) will not work as they should.

How does a mechanic diagnose the P0073 code?

  • Freeze frame data and trouble codes are recorded using an OBD-II scanner.

  • Next, the ambient air temperature sensor’s electrical circuitry and its connector should be inspected for bare wires, shorts or opens in the wires, and corrosion. Anything possibly covering the ambient air temperature sensor should be removed as well. If necessary, repair or replace any of these components.

  • The P0073 trouble code should be cleared and the a test drive of the vehicle should be conducted a test drive to see if the trouble code returns.

  • If the trouble code does not return, the repair is complete. In the event that the trouble code returns immediately, the ambient air temperature sensor needs to be replaced.

  • If the trouble code doesn’t come back immediately, but still returns, this could be an indication of an intermittent problem regarding the voltage leading to the Power Control Module (PCM). If this is the case, more extensive diagnosis would be required.

  • In the unlikely event that none of these measures have resolved the ambient air temperature sensor problem and cleared the P0073 code, it is possible the there is a problem with the Power Control Module (PCM). This is extremely rare.

Common mistakes when diagnosing the P0073 code

It is common for the ambient air temperature sensor to be replaced without first inspecting the wiring and connector for defects. It is not always necessary to replace the entire ambient air temperature sensor.

How serious is the P0073 code?

The P0073 trouble code is not considered to be one that is serious, as it does not affect the drivability or functioning of the vehicle. This may, however, be one that causes the driver to be uncomfortable as it could prevent the climate control system (heat and/or air condition controls) from working as they should.

What repairs can fix the P0073 code?

  • Repair or replace wires that have shorts or breaks in them
  • Absolve the electric circuitry and connector from any possible corrosion
  • Replace the ambient air temperature sensor

Additional comments for consideration regarding the P0073 code

It is important to inspect the wires and connector for damage or defects before replacing the ambient air temperature sensor.

Need help with a P0073 code?

YourMechanic offers certified mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

Check Engine Light
P0073
trouble codes

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0073 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,484

Rating Summary
3,176
153
40
23
92
3,176
153
40
23
92

Richard

10 years of experience
415 reviews
Richard
10 years of experience
This is the second time I’ve had Richard work on my car. He always does an outstanding job and is quick, knowledgeable and professional. Highly recommended!!
2012 DODGE CHALLENGER - CHECK ENGINE LIGHT IS ON - LAS VEGAS, NEVADA

Michael

13 years of experience
372 reviews
Michael
13 years of experience
Mike was an absolute professional when he arrived. He walked me thru the whole process of my repairs and also made good recommendations for preventive issues. His mechanical knowledge and good customer services was a breath of air and greatly appreciated :-)
2007 CHEVROLET AVALANCHE - CHECK ENGINE LIGHT IS ON INSPECTION - MARIETTA, GEORGIA

Rodrigo

10 years of experience
85 reviews
Rodrigo
10 years of experience
Rodrigo was exactly on time, very professional and friendly. He assessed my car, let me know the exact problem when a previous mechanic from a shop in my area was unable to. I felt he was very honest and sincere letting me know the level of urgency that I deal with the issue. Absolutely no pressure. I will absolutely use Rodrigo the next time I need anything to do with my car and will tell everyone about him. This is such a great service, I will never go to another mechanic again. It is so convenient. I couldn’t be happier. :)
2013 SMART FORTWO - CHECK ENGINE LIGHT IS ON - LAS VEGAS, NEVADA

Ricardo

8 years of experience
223 reviews
Ricardo
8 years of experience
Great service and was very helpful on what maintenance my vehicle needed and what to expect in the future. Would definitely recommend to anyone and will.
2004 MITSUBISHI LANCER - CHECK ENGINE LIGHT IS ON - LOS ANGELES, CALIFORNIA

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...

Related questions

Q: Q: Check Engine Light stays on.

Hi there You should have the computer Check Engine Light scanned by a mechanic. Once the codes are received and the pinpoint test is completed, you should have a diagnosis of the failed component. A lot of times a code...

Q: My car is jerking back and forth at high speeds

The first thing that needs to be done is to connect a scanner to the car and retrieve the code. This information will lead a technician down a diagnostic path. There is an important distinction that needs to be made...

Q: Can a bad canister purge valve cause my car to shake/vibrate under the hood when i brake or make constant stops?

First thing to check is the problem codes that are setting your Check Engine light on. While it is true that fumes from the vapor canister are pulled into the engine during "coast down" when there is high vacuum in...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com