DTC P0113 : Common Symptoms,Causes and Proven Fixes

What is the DTC P0113 OBDII Engine Code

The P0113 is a very generic trouble code that can be triggered by the ECM ( Engine Control Module) when it detects and record a fairly high output from the Intake Air Temperature Sensor. While this can be caused by a failing auto computer, replacing the ECM should not be the first culprit on your list. The IAT ensures a smooth start of the vehicle, by taking account the temperature of the air and properly adjusting the air/fuel ratio for a perfect combustion.

P0113 code definition : Intake Air Temperature Circuit High Input

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Generic and Common Symptoms of the P0113 Trouble Code

The cost of diagnosing the P0113 code can fairly inexpensive or even free given that you already have a scanning tool and by paying attention to the symptoms everything should become much more clearer. Stalling,rough idling and a slow start can indicate a faulty IAT sensor but can also include everything we listed below

check engine light P0113
  • Check Engine Light

Upon the detection of any issue in the car’s mechanical system the engine control module is responsible to read,analyze and notified the driver of any problems by illuminating the check engine lights as warning.

  • Trouble Starting in the cold

If you car is just cranking but not turning over it can be a sign that the Intake Air Temperature Sensor is having a problem.

  • Engine running extra lean or too rich.

The easiest way that you can check if your car is running too rich or too lean is by checking the spark plugs. IF you notice that the spark plugs are heavily coated in a dark matter with a gassy smell than you car is running too rich. If you the spark plugs remain somewhat ” clean” then your vehicle is running too lean.

Possible causes of running too rich:

  1. Dirty Air Filters
  2. Failing IAT sensors
  3. Worn out oxygen sensors
  4. A faulty PCM ( Powertrain Control Modules )
  5. Faulty Engine Coolant Sensor ( ECT)
  6. Bad Mass Airflow Sensor
  7. A circuit high input

Possible Causes of a car running too Lean:

  1. A faulty Pump Regulator
  2. Low Fuel
  3. Worn out IAT sensors
  4. EGR valve stuck in the open position
  5. Vacuum Leak
  6. Check engine light
  7. A circuit high input
  • Misfires

An engine misfire can be the cause of many factors such as the spark plugs (ignition part), The EGR valve ( Fuel) ,vacuum lines, timing belt ( mechanical ). Since this is about the code P0113 trouble code we should be checking the spark plugs for any foul play. ( check the above list ) 

How to Fix the trouble code P0113 “Intake Air Temperature Sensor ” Trouble Code

Luckily this DTC is one those codes that be fixed easily without the need to go to an auto repair shop. The P0113 code DTC by going down this checklist

  • Repair or replace the Intake Air Temperature connector short
  • Replace or repair the vacuum lines
  • Replace the O2 Sensor ( especially in dodge ram vehicles)
  • Replace the Intake Air Temperature sensor with a new one ( Replace the IAT Sensors)
Where is the intake temperature sensor located?

The Intake air temperature sensor is usually located at the bottom of the intake manifold. The intake Manifold is usually located right behind the throttle valve housing

What will a bad IAT sensor do?

A bad IAT sensor can lead but not limited to, being able to cold start, engine misfires, DTC P0113,your engine could be running too rich or too lean, Poor fuel economy

What does it mean when your intake temp is high?

A high intake temp also known as the P0127 can be caused by having a defective IAT sensor / MAF sensor which is critical to calculate fuel delivery and ignition timing for the engine
p0127 high intake temp

How do you fix an intake air temperature sensor?
Fix the (IAT) air temperature sensor in 5 steps!

Step 1 – Find the faulty IAT sensor
Step 2 – Unplug the negative battery terminal ( YOU MUST DO THIS )
Step 3 – Unplug the faulty IAT’s electrical connector
Step 4 – Install the new Air temperature sensor replacement and it’s electrical connector
step 5 – Plug the negative terminal LAST!

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