What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » P113C

Code P113C

Symptoms

• Check Engine Light is on

• Poor fuel economy

• Engine performance issues

Common Causes

• Faulty Intake Air Temperature Sensor

• Wiring issues such as short circuits or open circuits

• ECM malfunction

Glossary

ECM: Engine Control Module

IAT: Intake Air Temperature

Related Codes

• P0112

• P0113

Laymans terms

This code means that the car's computer is having trouble reading the temperature of the air going into the engine. It's like when a thermometer gets stuck and can't tell you if it's hot or cold outside.

Explanation

The P113C code indicates that the signal from the Intake Air Temperature (IAT) Sensor 1 is not changing as expected, suggesting it may be stuck at a certain value.

Technical description

The Intake Air Temperature Sensor 1 measures the temperature of the air entering the engine. This data is crucial for the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. If the sensor's signal is stuck, it could lead to inefficient engine performance.

Diagnosis steps

• Use an OBD-II scanner to confirm the code

• Inspect the IAT sensor and its wiring for damage

• Test the sensor's resistance with a multimeter

Repair procedures

• Replace the faulty IAT sensor

• Repair or replace damaged wiring

• Reprogram or replace the ECM if necessary

Tools required

• OBD-II scanner

• Multimeter

• Screwdriver set

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly inspect sensor wiring

• Keep the air intake system clean

• Perform routine engine diagnostics

Error code type

Sensor Issue

User experience recommendations

• Avoid driving for long distances until the issue is fixed

• Consult a professional mechanic if unsure about repairs

Warranty information

Check with your vehicle manufacturer; sensor issues may be covered under emissions warranty.

Historical data

The P113C code has been reported in various models, often related to sensor wear or wiring issues.

Urgency level

Moderate – Address the issue soon to avoid potential engine performance problems.

Legal and safety notice

Driving with a faulty sensor can lead to increased emissions and may not comply with local environmental regulations.

Testing conditions

• Engine at operating temperature

• Stable idle conditions

Component location

The Intake Air Temperature Sensor is typically located on the air intake duct or manifold.

FAQs

Q: Can I drive with a P113C code?
A: It's possible, but not recommended as it may lead to poor fuel efficiency and engine performance.

Q: How do I reset the check engine light after fixing the issue?
A: You can use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes.

Last updated: Jun 9, 2026 • Source: internal database

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