Code P0113 Definition
Intake Air Temperature (IAT) Sensor Circuit High Input Problem
What Does P0113 Mean?
The IAT sensor uses the air density and air temperature in the car’s environment and analyzes it to determine the correct amount of spark and fuel injected. This helps the engine to start up on a cold day and also keeps consistent fuel economy during hot days. When the code P0113 is set, it means that your engine’s computer sees a signal above the normal 4.91 volts of reference voltage for .5 seconds or more to the IAT sensor.
P0113 Symptoms
- Check Engine Light
- Trouble starting the engine
- Engine running lean
P0113 Causes
- Faulty/Loose IAT sensor
- Faulty/Loose wiring connections
Code P0113 Severity – Moderate 
It is okay to drive a vehicle with P0113 for a short period of time, but driving with this code for an extended period of time can cause internal engine damage due to the engine running so lean. Which will result in more costly repairs in the future.
Code P0113 Common Diagnosis Mistakes
Replacing the IAT sensor without checking for loose/corroded wiring around the sensor.
P0113 Diagnosis
- Tools Needed to Diagnose:
- FIXD
- Multimeter
- Scan gauge
Difficulty of Diagnosis and Repair – (1-4)
- Check the air temperature to compare the temperature with the coolant temperature. Let the car run for 5-10 minutes to let the car warm up before checking.
- Usually the air temperature is a little lower than the coolant temperature if working properly.
- Visually examine the wiring to the IAT sensor to look for loose or corroded circuitry.
- Use your multimeter to measure IAT resistance. Remove the IAT from the vehicle – reference your car manual for the location of your IAT.
- Check the resistance of your IAT and then apply heat to the IAT sensor tip to see if the resistance decreases. If there is no change or an infinite resistance reading, this means your IAT is faulty and should be replaced.
- If these steps do not clear your Check Engine Light, you may need to visit a mechanic because there may be internal issues with the PCM, ECM, etc.
Comments 13
Kelly Harris
September 14, 2018It was very helpful to me the fix Diagnostics is awesome
George
September 15, 2018Where is the iat sensor location on a 2004 f150 5.4L
Jeramie
August 16, 2019On the 5.4 the mas air flow sensor also doubles as air intake sensor
Robert
November 28, 2018Where is the iat sensor on 1998 chevy silverado c1500 5.o
Carlos
November 30, 2018Where is that IAT sensor on a 2012 dodge ram 1500
Michael R Carter
February 22, 2019Where is the IAT sensor on a 2015 Jeep Wrangler Unlimited?
Christopher M Miller
April 20, 2019Were do I find IAT senserON A 1998 LINCOLN NAVIGATOR
Nancy
May 13, 2019Where is the iat sensor located on a 2015 jeep renegade? I am due to travel tomorrow from SF to Red Bluff Ca will I be ok?
TJ
May 25, 2019where is iat sensor located on 07 nitro
Will
August 27, 2019Where is the IAT sensor. On 2006 jetta. TDI?…
Can’t tell if it’s the same as the Mas sensor
david
September 19, 2019who it cause the motor to run like its running on dead cyclinders or chokeing out?
david
September 19, 2019sorry thats on a 2005 dodge ram 1500 4.7
John
October 3, 2019Where is the oat sensor on a 2005 Nissan Pathfinder 4.0