AutoCodes – Isuzu – P1112 Isuzu

P1112 Isuzu Code - Intake Air Temperature Sensor Circuit Intermittent Low Voltage

Quick Answer

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. Common causes include Faulty Intake Air Temperature Sensor, Intake Air Temperature Sensor harness is open or shorted, Intake Air Temperature Sensor circuit poor electrical connection. 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
P1112 Isuzu indicates Intake Air Temperature Sensor Circuit Intermittent Low Voltage.
Common causes
Common causes include Faulty Intake Air Temperature Sensor, Intake Air Temperature Sensor harness is open or shorted, Intake Air Temperature Sensor circuit poor electrical connection.
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 Popularity 3,929
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 19, 2019
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Code P1112 Isuzu Description

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.
OBDII Code P1112 Isuzu - Intake Air Temperature Sensor Circuit Intermittent Low Voltage - AutoCodes.com
P1112 Isuzu Code - Intake Air Temperature Sensor Circuit Intermittent Low Voltage

What are the Possible Causes of the DTC P1112 Isuzu?

  • Faulty Intake Air Temperature Sensor
  • Intake Air Temperature Sensor harness is open or shorted
  • Intake Air Temperature Sensor circuit poor electrical connection

How to Fix the DTC P1112 Isuzu?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1112 Isuzu code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1112 Isuzu code?

Need more information on how to fix the P1112 Isuzu code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1112 Isuzu code diagnosed by a professional: Find a repair shop in your area

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 P1112 Isuzu Code

1. What are common symptoms of OBDII code P1112 in an Isuzu related to the Intake Air Temperature Sensor Circuit Intermittent Low Voltage?

The common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling.

2. What can cause the OBDII code P1112 to trigger in an Isuzu?

The code P1112 is triggered when the Intake Air Temperature (IAT) sensor circuit registers intermittent low voltage, which can be caused by a faulty sensor, damaged wiring, or poor connections.

3. How can I diagnose the cause of OBDII code P1112 in my Isuzu?

To diagnose the issue, you can start by checking the wiring and connections to the Intake Air Temperature sensor, testing the sensor itself for proper function, and ensuring there are no air leaks in the intake system.

4. Is it safe to continue driving my Isuzu with the OBDII code P1112 present?

While the vehicle may still be operable with this code, it is not recommended to continue driving for an extended period as it can lead to further engine issues and decreased performance.

5. How can I repair the Intake Air Temperature Sensor Circuit Intermittent Low Voltage issue in my Isuzu?

The repair typically involves replacing the faulty Intake Air Temperature sensor, repairing or replacing damaged wiring, and ensuring all connections are secure and free of corrosion.

6. Can a DIY enthusiast fix the OBDII code P1112 issue in an Isuzu?

If you have the necessary tools and experience working on automotive electrical systems, you may be able to diagnose and repair the issue yourself. However, if you are unsure, it is best to seek professional help.

7. Will resetting the OBDII code P1112 in my Isuzu make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it go away permanently. It is important to diagnose and repair the root cause to prevent the code from reappearing.

8. How long does it typically take to repair the Intake Air Temperature Sensor Circuit Intermittent Low Voltage problem in an Isuzu?

The repair time can vary depending on the exact cause of the issue and the expertise of the technician. In general, it can take anywhere from 1 to 3 hours to diagnose and repair the problem.

9. Are there any preventive measures I can take to avoid encountering OBDII code P1112 in my Isuzu?

Regular maintenance, such as keeping the intake system clean, inspecting wiring for damage, and replacing sensors as recommended by the manufacturer, can help prevent issues like code P1112 from occurring.

10. Can a bad Intake Air Temperature sensor cause other problems in my Isuzu besides triggering code P1112?

Yes, a faulty Intake Air Temperature sensor can cause a variety of issues, including poor fuel economy, incorrect air-fuel mixture, and overall decreased engine performance. It is important to address sensor issues promptly to avoid further complications.

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