P0113 OBD-II Trouble Code: IAT Sensor Circuit High Input Problem

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Cost of diagnosing the P0113 code

P0113 is a diagnostic trouble code (DTC) for "IAT Sensor Circuit High Input Problem". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 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
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Toyota$20.00
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P0113 code definition

Intake Air Temperature (IAT) sensor circuit high input problem

What the P0113 code means

P0113 is the OBD-II generic code that the engine control module (ECM) has recorded the IAT sensor output above expected sensor range.

What causes the P0113 code?

If the sensor output voltage is more than 4.91 V for 0.5 seconds or more, the ECM determines that there is an open circuit in the IAT sensor circuit, and sets trouble code P0113.

What are the symptoms of the P0113 code?

  • The ECM will turn on the Check Engine Light and go into a failsafe mode.
  • Engine may not start as usual
  • Engine may run extra lean
  • Engine may have pre-ignition problems from lean burn conditions

Note: The symptoms are determined by the manufacturer failsafe ECM strategy for the vehicle during a failure and may vary between manufacturers and vehicles.

How does a mechanic diagnose the P0113 code?

  • Scans the ECM, documents the codes received, and views the freeze frame data to see the conditions present when the code was set

  • Clears the vehicle of fault codes and the retests the vehicle to see if the code comes back

  • Performs a visual inspection to check for shorting harness or connector to sensor

  • Observes the sensor’s live data on the scanner while disconnecting the IAT sensor connector to see if the sensor reading goes to -40°F indicating the sensor is shorted

If the sensor is disconnected and input is still 240°F then the short is in the connector or harness.

If no problems are noted, the mechanic performs the manufacturer's specific pinpoint tests for the code and repair as needed.

Common mistakes when diagnosing the P0113 code

  • Not performing a visual inspection of connections and wiring

  • Not following the manufacturer pinpoint test procedure step-by-step and skipping steps

  • Not replacing an IAT sensor only when tests indicate a problem

  • Not connecting a new or known good sensor to the harness and viewing the ECM data to see if the temperature output from the sensor is as expected

How serious is the P0113 code?

  • The P0113 code will cause the engine ECM to go into a failsafe mode.

  • The failsafe mode, depending on the manufacturer failsafe mode strategy, may cause lean condition drivability symptoms.

  • Driving the vehicle for an extended time running too lean can cause internal engine problems with rings and valves.

What repairs can fix the P0113 code?

  • Repairing or replacing the IAT connector short
  • Repairing or replacing the wiring short as necessary
  • Replacing the IAT with a new sensor

Additional comments for consideration regarding the P0113 code

  • The P0113 code is often associated with P0111, P0112, and P0114 codes.

  • Most intake air temperature sensor problems for code P0113 are failures from damaged shorted harnesses or from sensors shorted internally to power.

Need help with a P0113 code?

YourMechanic offers certified mobile 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.

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P0113

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Michael

17 years of experience
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Michael
17 years of experience
Kia Forte - Check Engine Light is on - Bowie, Maryland
Great experience with Michael! He expertly went over the car issues and provided information on all inspection points. Thank you!

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25 years of experience
GMC Envoy - Check Engine Light is on - Atlanta, Georgia
Jonathan was amazing !!!! Incredibly friendly and extremely knowledgeable! I am very satisfied! Thank you Jonathan for making such a frustrating car situation feel like I have options now !

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23 years of experience
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23 years of experience
Saturn Ion - Check Engine Light is on - Washington, District of Columbia
Jermaine texted me to let me know that he was on his way. He was courteous and he arrived on time. Jermaine took the time to explain the problem I was having with my car and let me know that he would send a detailed report. I was more than happy with his service.

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Andrew
14 years of experience
Toyota Echo - Check Engine Light is on - Beaverton, Oregon
Andrew arrived early, and got right to work. He knew the likely problem from my 10 second description, checked the vehicle diagnostics, and verified the diagnostics by swapping some parts and doing a quick test drive. He even showed me the OBD2 scanner output. The vehicle has over 151k miles, and Androw could easily have tried to upsell me on replacing all of the ignition coils, rather than just the faulty one, purely based on the vehicle's age -- but he didn't. He just replaced the one necessary, topped up fluids, mentioned it was time for an oil change and new tires in the back, and that was it. Everything was fixed inside of an hour, while working in the rain.


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