P0112 Mitsubishi Code - Intake Air Temperature Sensor Low Input
Quick Answer
The P0112 diagnostic trouble code (DTC) for Mitsubishi vehicles indicates that there is a low input signal coming from the Intake Air Temperature (IAT) sensor. Common causes include Faulty IAT Sensor: The sensor itself may be malfunctioning and providing incorrect temperature readings, Damaged Wiring or Connectors: Corrosion, breaks, or loose connections in the wiring harness can disrupt the signal from the IAT sensor to the ECM, ECM Issue: A problem with the engine control module could prevent it from accurately interpreting the data from the IAT sensor. 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 Mitsubishi indicates Intake Air Temperature Sensor Low Input.
- Common causes
- Common causes include Faulty IAT Sensor: The sensor itself may be malfunctioning and providing incorrect temperature readings, Damaged Wiring or Connectors: Corrosion, breaks, or loose connections in the wiring harness can disrupt the signal from the IAT sensor to the ECM, ECM Issue: A problem with the engine control module could prevent it from accurately interpreting the data from the IAT sensor.
- 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 P0112 Mitsubishi Description
The P0112 diagnostic trouble code (DTC) for Mitsubishi vehicles indicates that there is a low input signal coming from the Intake Air Temperature (IAT) sensor. The IAT sensor is responsible for measuring the temperature of the air entering the engine intake manifold. This information is crucial for the engine control module (ECM) to adjust the air-to-fuel ratio and ignition timing for optimal performance and efficiency. When the ECM receives a low input signal from the IAT sensor, it may cause the engine to run rich, resulting in decreased fuel efficiency, reduced power output, and increased emissions.
Common Causes of P0112 Mitsubishi
- Faulty IAT Sensor: The sensor itself may be malfunctioning and providing incorrect temperature readings.
- Damaged Wiring or Connectors: Corrosion, breaks, or loose connections in the wiring harness can disrupt the signal from the IAT sensor to the ECM.
- ECM Issue: A problem with the engine control module could prevent it from accurately interpreting the data from the IAT sensor.
- Intake Air Leaks: Any leaks in the intake system can affect the air temperature readings, triggering the P0112 code.
- Sensor Placement: The IAT sensor may be incorrectly positioned, leading to inaccurate temperature readings.
Symptoms of P0112 Mitsubishi
- Check Engine Light: The most common symptom associated with the P0112 code is the illumination of the check engine light on the vehicle's dashboard.
- Poor Fuel Efficiency: A malfunctioning IAT sensor can cause the engine to run rich, leading to decreased fuel efficiency.
- Rough Idle: The engine may experience rough idling or stalling due to incorrect air-to-fuel ratios.
- Reduced Power Output: The vehicle may lack power during acceleration or struggle to maintain speed.
- Increased Emissions: A faulty IAT sensor can lead to increased emissions, potentially causing the vehicle to fail emissions tests.
How to Fix P0112 Mitsubishi
- Diagnostic Scan: Begin by using an OBD-II scanner to retrieve the specific trouble code and confirm the issue is related to the IAT sensor.
- Inspect Wiring and Connectors: Check the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as needed.
- Test IAT Sensor: Test the IAT sensor using a multimeter to ensure it is functioning correctly. Replace if faulty.
- Clear Codes: Clear the DTC from the ECM and test drive the vehicle to ensure the issue has been resolved.
- Recheck: After driving the vehicle, rescan the ECM to confirm that the P0112 code has not returned.
Cost to Fix P0112 Mitsubishi
The typical repair costs for addressing a P0112 code related to the IAT sensor can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's essential to consider that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to check local rates for a more accurate estimate before proceeding with the repair.
When is the Code Detected?
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Frequently Asked Questions about P0112 Mitsubishi Code
1. What does OBDII code P0112 mean for a Mitsubishi?
P0112 indicates that the intake air temperature (IAT) sensor is reporting a low voltage signal, which suggests extremely low air temperature readings or a sensor issue.
2. What are the symptoms of code P0112 in a Mitsubishi?
Symptoms may include poor engine performance, rough idling, reduced fuel efficiency, or difficulty starting the engine, along with the check engine light.
3. What causes code P0112 in a Mitsubishi?
Common causes include a faulty IAT sensor, damaged wiring or connectors, a short circuit, or an issue with the engine control module (ECM).
4. Can a dirty air filter trigger code P0112?
While unlikely, a severely clogged air filter could potentially affect airflow and temperature readings, indirectly contributing to the issue.
5. How do I fix code P0112 on my Mitsubishi?
Inspect and clean the IAT sensor, check for damaged wiring or connectors, and replace the sensor if necessary. Reset the code after repairs.
6. Where is the IAT sensor located in a Mitsubishi?
The IAT sensor is typically located in the intake manifold or air intake hose, near the engine air filter housing.
7. Can I drive my Mitsubishi with code P0112 active?
While the car may still run, driving with code P0112 can lead to poor fuel efficiency and long-term engine performance issues. Prompt diagnosis and repair are recommended.
8. How do I test the IAT sensor for code P0112?
You can use a multimeter to measure the resistance of the IAT sensor. Compare the readings with the manufacturer’s specifications to determine if the sensor is faulty.
9. Does code P0112 affect emissions in a Mitsubishi?
Yes, an inaccurate intake air temperature reading can disrupt the air-fuel mixture, potentially leading to higher emissions.
10. How much does it cost to fix code P0112 in a Mitsubishi?
Costs vary depending on the issue, but replacing an IAT sensor typically costs $50-$150, plus labor if done professionally. Wiring repairs may cost more.
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