AutoCodes – Generic – P0112

P0112 Code - Intake Air Temperature Circuit Low Input

Quick Answer

The Intake Air Temperature (IAT) sensor is built into Mass Air Flow (MAF) sensor. Common causes include Dirty Air Filter, Faulty Intake Air Temperature (IAT) Sensor, Intake Air Temperature Sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0112 indicates Intake Air Temperature Circuit Low Input.
Common causes: Common causes include Dirty Air Filter, Faulty Intake Air Temperature (IAT) Sensor, Intake Air Temperature Sensor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 41,089

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0112 Description

The Intake Air Temperature (IAT) sensor is built into Mass Air Flow (MAF) sensor. The sensor detects intake air temperature and transmits a signal to the Powertrain Control Module (PCM). The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle. It is used by the Powertrain Control Module to assist with the calculation of idle speed, fuel mixture, and spark advance. The Diagnostic Trouble Code (DTC) will set when the PCM detects an excessively low voltage from the sensor.

OBDII Code P0112 - Intake Air Temperature Circuit Low Input - AutoCodes.com — P0112 Code - Intake Air Temperature Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112?

Dirty Air Filter
Faulty Intake Air Temperature (IAT) Sensor
Intake Air Temperature Sensor harness is open or shorted
Intake Air Temperature Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0112?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0112 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0112 code?

Need more information on how to fix the P0112 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0112 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0112 Acura — Intake Air Temperature Sensor 1 Circuit Low Voltage
P0112 Audi — Intake Air Temperature Circuit Low Input
P0112 BMW — Intake Air Temperature Sensor 1 Circuit Low Bank 1
P0112 Buick — Intake Air Temperature Sensor Circuit Low Voltage
P0112 Cadillac — Intake Air Temperature Sensor Circuit Low Voltage
P0112 Chevrolet — Intake Air Temperature Sensor Circuit Low Voltage
P0112 Chrysler — Intake Air Temperature Sensor 1 Circuit Low
P0112 Dodge — Intake Air Temperature Sensor 1 Circuit Low
P0112 Ford — Intake Air Temperature Sensor 1 Circuit Low Input
P0112 GMC — Intake Air Temperature Sensor Circuit Low Voltage
P0112 Honda — Intake Air Temperature Sensor 1 Circuit Low Voltage
P0112 Hyundai — Intake Air Temperature Sensor 1 Circuit Low Input
P0112 Infiniti — Intake Air Temperature Circuit Low Input
P0112 Isuzu — Intake Air Temperature Sensor Circuit Low Voltage
P0112 Jaguar — Intake Air Temperature Circuit Low Input
P0112 Jeep — Intake Air Temperature Sensor 1 Circuit Low
P0112 KIA — Intake Air Temperature Sensor 1 Circuit Low Input
P0112 Lexus — Intake Air Temperature Circuit Low Input
P0112 Lincoln — Intake Air Temperature Sensor 1 Circuit Low Input
P0112 Mazda — Intake Air Temperature Circuit Low Input
P0112 Mercedes-Benz — Intake Air Temperature Circuit Low Input
P0112 Mercury — Intake Air Temperature Sensor Circuit Low Input
P0112 MINI — Intake Air Temperature Sensor 1 Circuit Low Bank 1
P0112 Mitsubishi — Intake Air Temperature Sensor Low Input
P0112 Nissan — Intake Air Temperature Circuit Low Input
P0112 Pontiac — Intake Air Temperature Sensor Circuit Low Voltage
P0112 Saturn — Intake Air Temperature Sensor Circuit Low Voltage
P0112 Scion — Intake Air Temperature Circuit Low Input
P0112 Subaru — Intake Air Temperature Circuit Low Input
P0112 Toyota — Intake Air Temperature Circuit Low Input
P0112 Volkswagen — Intake Air Temperature Circuit Low Input

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0112 Code

1. What are the common symptoms of OBDII code P0112 (Intake Air Temperature Circuit Low Input)?

The common symptoms of P0112 include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What are the typical causes of OBDII code P0112?

Common causes of P0112 include a faulty intake air temperature (IAT) sensor, damaged sensor wiring, loose connections, or issues with the sensor circuit.

3. How can I diagnose the Intake Air Temperature sensor for OBDII code P0112?

To diagnose the IAT sensor, you can use a multimeter to test the sensor's resistance, check for any visible damage or corrosion, and inspect the sensor's wiring and connections for any issues.

4. Can a dirty air filter trigger OBDII code P0112?

Yes, a dirty air filter can indirectly contribute to triggering P0112 by affecting the temperature readings at the intake. It is recommended to check and replace the air filter if necessary when diagnosing this code.

5. Is it safe to continue driving with OBDII code P0112 present?

It is not recommended to drive with P0112 present, as it can lead to potential engine problems and decreased efficiency. It is best to address the issue promptly to prevent further damage.

6. Can extreme weather conditions trigger OBDII code P0112?

Extreme heat or cold conditions can affect the IAT sensor readings and potentially trigger P0112. It is advisable to consider weather conditions when diagnosing this code.

7. How can I reset OBDII code P0112 after making repairs?

After making necessary repairs to address P0112, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the stored fault code.

8. Will fixing OBDII code P0112 improve fuel efficiency?

Addressing P0112 can improve fuel efficiency by ensuring the engine receives accurate temperature readings for optimal performance and fuel delivery. Fixing the underlying issue can help restore fuel efficiency.

9. Can a DIY enthusiast repair OBDII code P0112 at home?

Depending on the cause, a DIY enthusiast may be able to repair P0112 at home by replacing the IAT sensor, checking and repairing wiring issues, or cleaning sensor connections. However, professional diagnosis may be necessary for complex issues.

10. How important is it to address OBDII code P0112 promptly?

It is important to address P0112 promptly to prevent potential engine damage, poor performance, and decreased fuel efficiency. Ignoring the code can lead to more severe issues over time.