Help! What Does Error Code P0113 Mean?

August 21, 2018

Help! What Does Error Code P0113 Mean?

Your car is reliant on hundreds of parts working in cooperation just so you can get to your destination. It’s something that most of us take for granted. Until we are faced with a malfunction.

Of course, there’s never a good time for a problem. But today’s cars are able to give us some insight into what may be wrong. Our cars now have computers that can communicate to some degree what the problem is. The computer does this by way of different error codes. By understanding what an error code is trying to tell us, we can more quickly have the problem diagnosed and repaired.

What Does Error Code P0113 Mean?

Your IAT sensor analyzes air temperature and density to make sure your engine starts correctly and maintains fuel economy regardless of the weather outside. When you see the error code P0113, it means the engine's computer is detecting above normal voltage to the IAT sensor.

So What Exactly Does That Mean to Me?

Your car has a PCM or Powertrain Control Module. This is your car’s “brain” and the computer system that runs it. This PCM constantly monitors the temperature of air entering the engine and does so by sending a voltage of about 5 to the IAT.

Since it is a thermistor, the IAT then resists that charge depending upon its temperature. The resulting voltage is sent back to the PCM. The PCM then uses that returning information to keep the air/fuel mixture, the Ignition Spark Timing, and EGR valve adjusted properly.

If the level of voltage is above 5 volts when returned to the PCM, it now detects that something is wrong and the P0113 Check Engine Light is illuminated.

What Can Cause The P0113 Error Code?

There are several things that can cause that error code. Some possibilities are:

  • The IAT is defective
  • The IAT is corroded
  • The IAT circuit has shorted
  • Failure of the PCM
  • Electrical wiring has become corroded or detached
  • The air filter is dirty
  • The Mass Air Flow Sensor is defective

Symptoms Associated with a P0113 Error Code

You may see one or several of the following symptoms accompanying the P0113 error code:

  • The check engine light will illuminate
  • Your engine will perform poorly
  • Your fuel economy will diminish
  • You may notice an increase in your car’s emissions
  • Your acceleration will be sluggish

Diagnosing the Problem

It’s important to properly diagnose the issue when you are seeing the P0113 error code. Many people make some common mistakes during this process. Make sure to:

  • Follow all steps and instructions during the test procedure.
  • Thoroughly examine all connections and wiring.
  • Check other causes such as air filters or wiring before replacing the IAT sensor.

Use an OBD-II Scanner in order to assess the problem. If you notice that the error code persists, there are several other areas to check.

Air Temperature Reading

Allow your engine to run until it’s warm. Then use a scan gauge. This will compare your air temperature to the temperature of your coolant. An IAT that is working correctly should show a slightly lower temperature than your coolant temperature.

Wiring Issues

A P0113 error code can be caused by any corroded or loose wiring between the IAT and the PCM. Using a scanning tool, you will want to scan for an IAT reading. If the information comes back at -30°F, the connector should be unplugged.

You can then install a jumper wire between the ground circuits and the harness connector signal.

The IAT temperature reading should be maxed out at the high end at 280°F or higher. If so, the wiring is fine. The problem may have been the connection.

How to Fix the P0113 Code

  • A P0113 code is frequently the result of a failed sensor or a dysfunctional circuit. The most common repair is to replace the IAT. This is typically not a costly repair.
  • Replace faulty wiring
  • A P0113 code sometimes indicates a faulty PCM. Replace the PCM if necessary.

If the problem is a faulty PCM, contact our PCM experts at Auto PCMS. AutoPCMS is dedicated to helping you get the longest life out of your car. That’s why we offer same-day shipping and we have a wide selection of replacement PCMs, ECMs and ECUs for Dodge, Cadillac, Chrysler, Jeep, Toyota, Honda, Lexus, Ford, Mitsubishi, Chevrolet, GM, and more! Call us today at 1-800-886-9926.