P0110 OBD-II Trouble Code: Intake Air Temperature Sensor Circuit Malfunction

Obd2 Trouble Code

The P0110 code occurs in the engine control units trouble code memory when it finds a problem with the circuit’s intake air temperature sensor.

There could be a couple of reasons for this, and in this article, we will teach you everything you have to know about the P0110 trouble code.

Code P0110 Definition

Intake Air Temperature Sensor – Circuit Malfunction

What does the P0110 code mean?

The P010 code means that the engine control unit recognizes a faulty circuit towards the intake air temperature sensor.

It can be either a faulty sensor itself or a wiring problem on the way towards it. The trouble code refers to an electrical circuit problem and not an air temperature problem.

The air intake temperature sensor is often integrated into the MAF sensor.

P0110 Trouble Code Symptoms

The only symptom you may experience regarding the P0110 code is a check engine list in most cases. In some rare cases, you can experience performance problems like rough idle or poor engine performance.

Causes of the P0110 Code

Because the P0110 code tells us that there is a problem with the circuit to the sensor, there are actually not many things that can cause it. Here are the most common causes.

  • Faulty Air Intake Temperature Sensor
  • Faulty Air Intake Temperature sensor Connector Plug (Corrosion)
  • Broken or shorted wirings to the air intake temperature sensor
  • A bad engine control unit

How serious is the P0110 Code?

Low – When the P0110 code occurs, the engine will stop reading the air intake temperature, and it will use estimated values instead. The fuel correction of the air temperature is pretty low.

The P0110 code will not make your car stop after the road, and it will not cause any further engine damages – if we are not talking about the very long term. It is still recommended to repair the P0110 code as fast as possible.

What repairs can fix the P0110 code?

  • Replace Air Intake Temperature Sensor
  • Repair Air Intake Temperature sensor wirings
  • Clean air intake temperature sensor connector plug
  • Replace MAF sensor (When IAT sensor is integrated into it)
  • Replace engine control unit

Common P0110 Diagnosis mistakes

A common mistake for the P0110 diagnosis is to replace the air temperature sensor without checking the connector plug and wirings.

Another mistake is to start looking for things that cause a high intake temperature without realizing that this is a fully electrical trouble code, which tells us that there is something wrong in the circuit.

How to diagnose the P0110 Trouble Code

There are some pretty easy ways you can diagnose the P0110 code. Here is how a professional would diagnose it. You may need some special tools to follow the guide.

  1. Connect an OBD2 scanner and check for related trouble codes.
  2. Remove the IAT sensors connector plug and check for corrosion.
  3. Inspect the wires visually and check for any shorts between them with a multimeter.
  4. Measure the ohm between the two pins of the intake air temperature sensor. If the IAT sensor is integrated into the MAF sensor, you need a wiring diagram to know which ones. You may need to check in your repair manual for the exact resistance you should get for your car model. Usually, at 68 F (20 C), you should get around 37K ohms. Replace the sensor if faulty and reset codes.
  5. Remove the engine control unit connector plug and measure the sensor from there. If you get any different values than measuring from the sensor directly, repair wirings, and reset code.
  6. Replace intake temperature sensor even if you got the right values—reset codes.
  7. Replace the engine control unit if you tried everything else and make sure the sensor and wirings are correct.

Estimated P0110 Repair Cost

Here are some common repair costs associated with the P0110 trouble code. The prices include labor and part costs but do not include diagnosis costs.

  • Air intake temperature sensor replacement cost – 20$ to 60$
  • MAF sensor replacement cost (If IAT sensor is integrated) – 200$ to 400$
  • Repair Air intake temperature wirings – 30$ to 80$

Related P0110 Trouble Codes

Written by: Magnus Sellén

Founder, owner & main author of Mechanic Base. I have been repairing cars for more than 10 years, specialized in advanced diagnostics & troubleshooting. I have also been a drifting driver and mechanic for over 7 years.