P0112

The P0112 diagnostic trouble code means the PCM has identified a intake air temperature circuit low input problem. This code indicates that a sensor or its circuit is not providing expected readings to the engine management system. Faulty sensor data can cause the PCM to make incorrect adjustments, affecting engine performance. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Hard starting in certain conditions. Engine running rough. Poor fuel economy. Erratic engine behavior. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Wiring issues (open, short, or high resistance). Incorrect sensor installed. Corroded or damaged sensor connector. Faulty PCM (Powertrain Control Module). Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Connect an OBD-II scanner and read all stored trouble codes and freeze frame data. Locate the specific sensor referenced by the code. Inspect the sensor connector for corrosion, damage, or loose pins. Test the sensor output using a multimeter or scan tool live data. Check the wiring between the sensor and the PCM for opens or shorts. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Powertrain (P) collection on OBD Codes. We provide comprehensive, up-to-date information to help you find solutions quickly.