Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the air coming into the engine is too cold. It's like the car's thermometer is saying it's freezing when it's actually not.
The Intake Air Temperature (IAT) sensor measures the temperature of the air entering the engine. This code indicates that the sensor is reporting a temperature that is too low, which might be due to a problem with the sensor or its wiring.
The P0112 code is triggered when the Powertrain Control Module (PCM) detects a low voltage signal from the Intake Air Temperature Sensor 1. This sensor is responsible for measuring the temperature of the air entering the engine, which is crucial for the PCM to calculate the correct air-fuel mixture.
• Check Engine Light is on
• Poor fuel economy
• Rough idling
• Faulty Intake Air Temperature Sensor
• Wiring issues such as shorts or open circuits
• Faulty PCM
PCM: Powertrain Control Module
IAT: Intake Air Temperature
• Use an OBD-II scanner to confirm the code.
• Inspect the IAT sensor and its wiring for damage.
• Test the IAT sensor with a multimeter to check for proper resistance.
• Replace the Intake Air Temperature Sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II Scanner
• Multimeter
• Screwdriver set
$50 - $200
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect sensor connections.
• Keep the air intake system clean.
• Perform regular vehicle maintenance.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have your vehicle inspected by a professional if you are unsure.
• Regularly check and maintain your vehicle's sensors.
Check with your vehicle manufacturer for warranty coverage on sensors.
The P0112 code has been a common issue in vehicles with aging sensors and wiring, often resolved by sensor replacement.
Moderate – It should be addressed soon to avoid poor engine performance and fuel economy.
Driving with a malfunctioning sensor can lead to increased emissions and may not comply with local emission laws.
• Engine is at operating temperature.
• Vehicle is running at idle.
The IAT sensor is typically located in the air intake duct or on the intake manifold.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to poor fuel economy and engine performance.
Q: Can I drive my car with this code?
A: While you can drive with this code, it's best to fix it soon to avoid further issues.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.