P0112 Code - Intake Air Temperature Circuit Low Input

Quick Answer

The P0112 code indicates that there is a low input signal from the Intake Air Temperature (IAT) sensor circuit. Common causes include Faulty IAT sensor, Wiring or connector issues in the IAT circuit, Intake air leaks. 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 Faulty IAT sensor, Wiring or connector issues in the IAT circuit, Intake air leaks.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
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Common Causes of P0112

Symptoms of P0112

How to Fix P0112

Cost to Fix P0112

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Code P0112 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.