The OBD-II trouble code P0110 is associated with a problem in the intake air temperature (IAT) sensor circuit.
This sensor is responsible for measuring the temperature of the incoming air into the engine. The ECM (Engine Control Module) uses this data to determine the optimal air and fuel mixture for combustion.
When the ECM detects that the voltage input from the IAT sensor is outside the expected range, it triggers the P0110 trouble code.
What Does Code p0110 Mean?
Diagnostic trouble code (DTC) P0110 stands for “Intake Air Temperature Sensor Circuit (Bank 1).”
This error code is set when the powertrain control module (PCM) perceives that the signal from the intake air temperature (IAT) sensor circuit does not match factory specifications.
The “sensor 1” portion of the code applies to vehicles that have multiple IAT sensors. Bank 1 points to the side of the engine opposite the #1 cylinder.The IAT sensor is a negative temperature coefficient (NTC) thermistor that decreases in resistance as the temperature of the sensor increases.
Its purpose is to measure the temperature of the air entering the engine and provide this data to the PCM.
The information provided by the IAT sensor (along with various other sensors) is used by the PCM for fuel control and ignition timing. If the PCM detects that the signal it has received from the IAT sensor might be out of normal operating range, it will log trouble code P0110.
Potential Causes of a p0110 Code
Some of the most common causes of a P0110 code include:
- Issues with the ECM (rare)
- Faulty IAT sensor
- Damaged wiring or loose/corroded connectors
- Vacuum leaks in the intake system
- Clogged air filter restricting airflow
What are the Common Symptoms of the P0110 Code?
Diagnostic trouble code P0110 is often accompanied by a number of additional symptoms, many of which vary substantially in severity. Recognizing each of these symptoms often proves invaluable when attempting to diagnose and rectify the issue at hand.
The following are several of the most common symptoms associated with diagnostic trouble code P0110.
- Illuminated check engine light
- Erratic idle
- Hesitation under load
- Rich-smelling exhaust
- Backfiring
- Increased fuel consumption
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.
- Connect an OBD2 scanner and check for related trouble codes.
- Remove the IAT sensors connector plug and check for corrosion.
- Inspect the wires visually and check for any shorts between them with a multimeter.
- 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.
- 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 the wirings and reset the code.
- Replace the intake temperature sensor even if you got the right values, then reset the codes.
- Replace the engine control unit if you tried everything else, and make sure the sensor and wirings are correct.
How Much Does It Cost to Fix a p0110 Code?
Common cost to Fix P0110 code :
- Replacing the IAT sensor: $50-$200
- Repairing wiring or connectors: $50-$150
- Replacing the air filter: $15-$50
- Fixing vacuum leaks: $50-$200
Actual repair costs will vary depending on the specific vehicle make and model, as well as local labor rates.