How to Troubleshoot & Fix P0113 Jeep DTC Code? (Detailed Guide)

The onboard diagnostic system (OBD) of a vehicle produces Diagnostic Trouble Code (DTC) when it notices any issue or potential issues with one of the systems or components of the vehicle.

P0113 is such an error code that indicates a problem with the intake air temperature of the vehicle system.

If you have noticed the display flash the code p01113, no need to panic. In this article, we will discuss all about the code P0113.

What Does P0113 Jeep Code Mean?

The code P0113 on the jeep means Intake Air Temperature (IAT) Sensor Circuit High Input. This code appears when the PCM alerts that the IAT sensor has received a high-voltage input. 

The IAT sensor keeps monitoring the density and the air temperature inside the car environment. 

This monitoring is done by sending a 5-volt signal to the IAT sensor. Depending on the amount of voltage the PCM gets back, it is able to measure the air intake temperature. 

If the temperature is as usual, it will send back a signal way below 5 volts. On the other hand, when the signal is higher than this, there is an error where too much power is sent to the vehicle. 

The code P0113 specifically comes on when the voltage is above the threshold of 4.91 volts for over 0.5 seconds. The breakdown of code P0113 is: 

• P = Powertrain, the system of components that propels the car forward
• 0 = A generic number derived from the SAE standard
• 1 = Malfunctions with the intake air temperature sensor
• 13 = Intake Air Temperature (IAT) Sensor Circuit High Input

P0113 Code: What Causes Intake Air Temperature (IAT) Sensor Circuit High Input on Jeep?

There’s always a specific reason for the IAT sensor to return a high voltage to the PCM. Knowing the exact reasons that lead to the high voltage of the IAT sensor is the first step in dealing with code P0113. 

Here are the causes of Intake Air Temperature (IAT) Sensor Circuit High Input to the PCM-

• Damaged or faulty IAT sensor
• Wiring issue
• Dirty air filter
• The problem with the Mass airflow sensor 
• Open or shorted IAT sensor harness
• PCM failure

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How to Troubleshoot & Fix P0113 Jeep Code?

Now that you’re aware of all the possible causes for the P0113 code’s appearance, it is time to diagnose the source of the issue. 

In order to do that. you need to check each of the components and apply the appropriate solution for troubleshooting it.

1. Test the IAT Sensor

One of the most common causes of the high input in the IAT sensor is some kind of internal problem inside the sensor. 

The sensor might go through some issues regarding the adjustment or wiring of the components inside. Because of those internal issues, the air temperature becomes lower than the engine coolant. 

Once you deduct this difference in reading, you can come to the conclusion that the IAT sensor itself is bad. That is exactly why the code P0113 is showing up on your jeep.

In order to diagnose a bad IAT sensor, run the engine of the jeep for a while. Let the engine run idly until the temperature becomes warm enough. 

Use a temperature gauge or infrared thermometer to measure the temperatures of the engine coolant and the air intake. Compare these two temperatures and diagnose either of these two-

• If the temperature of the air intake is equal to or slightly higher than the engine coolant, the IAT sensor is perfectly fine.
• If the temperature of the air intake is less than the engine coolant, the IAT sensor is bad. You will need to replace or repair the sensor with the help of an expert in this case.

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2. Examine the Wiring Connections

Next, there are tons of wires connecting the IAT sensor to the PCM. Some of these wires can get loose, frayed, or damaged over the course of time. Extreme damage can break some parts of the wires too. 

Apart from that, the metal wires face a high level of corrosion and short circuit the sensor connection. 

These damaged wiring connections can mess with the air intake temperature input. As a result, the PCM detects a higher-than-usual input from the IAT sensor. 

Locate the IAT sensor first to examine the wirings. You need to inspect the entire electrical connection starting from the PCM to the IAT sensor for this. 

Visually examine and locate the damage in the wirings. Repair the damage if possible. Otherwise, replace the wires to secure a good connection.

You can use a multimeter and check the entire wiring system to detect any bad connections. Secure the wires tightly if they’re loose. Use a carbonated solution to remove any kind of corrosion from the wires effectively.

3. Check the Air Filter for Uninterrupted Airflow

The air filter included in the system is exposed to the environment outside. So, it is prone to accumulating dirt, debris, and dust. 

These natural components slowly gather on the opening of the air filter and interrupt the airflow. This dirty and clogged air filter is one of the most common reasons for this code’s appearance.

Without proper airflow inside the system, the IAT sensor will not be able to measure the air intake temperature. Hence, a faulty reading will be taken and the code P0113 will appear.

Open the gate of the air filter and check if there is dirt and debris stuck in the airway. If you find debris blocking the airflow, remove them by using a thin stick or brush. 

Clean the dirt inside the air filter with some compressed air in a clear way. Replace the air filter with a new one if it is way too dirty for a cleanup.

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4. Inspect the Mass Air Flow Sensor

The MAF or mass air flow sensor controls the amount of air inside the system at all times. 

The amount of air in the combustion chamber always needs to be sufficient in order for the system to run smoothly. This air supply is monitored by the MAF sensor.

When the MAF sensor becomes too dirty to function and do its job properly, the IAT sensor does not have enough air intake to function. 

The same goes for a damaged MAF sensor. In both of those cases, there is a lack of air intake for the IAT sensor which is why the code P0113 appears. 

Check on the mass air flow sensor to verify whether it is simply dirty or severely damaged. Use a completely dry microfiber towel if the sensor is just dirty to clean it up. 

On the other hand, if the sensor is damaged beyond recovery, it is a good idea to replace it.

5. Check for a Faulty PCM

When you have finished diagnosing all of the components mentioned above and found no faults, the problem is most likely a faulty PCM itself. 

The powertrain control module is the heart of the vehicle that controls and monitors other parts. If this major component fails, there is no way the IAT sensor will be able to work accurately. 

You will need to replace the PCM if it has failed and acquired damage. Firstly, figure out the year and model of your vehicle. 

Additionally, get the PCM and OEM numbers down to find a compatible and suitable PCM replacement. Get professional help for this replacement as it is too complex for anyone to do on their own.

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FAQs.

In this section, you will find answers to some of the most asked questions regarding the code P0113 on the jeep.

Conclusion

It is true that the code P0113 on the jeep is not as serious right away. However, it is always recommended to deal with the code as soon as possible. 

Contact a professional for help if you fail to clear the codes by yourself. The sooner you clear this code, the less damage your engine faces.

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