AutoCodes – Cadillac – P112C Cadillac

P112C Cadillac Code - Intake Air Temperature Sensor 3 Circuit Low Voltage

Quick Answer

The Intake Air Temperature (IAT) sensor contains a semiconductor device which changes the resistance based on the temperature (a thermistor). 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
P112C Cadillac indicates Intake Air Temperature Sensor 3 Circuit 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 1,015
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 29, 2019
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Code P112C Cadillac Description

The Intake Air Temperature (IAT) sensor contains a semiconductor device which changes the resistance based on the temperature (a thermistor). The IAT sensor is located in the air intake passage of the engine air induction system. The IAT sensor has a signal circuit and a ground circuit. The Powertrain Control Module (PCM) monitors the Intake Air Temperature Sensor signal. The PCM sets the OBDII code when the Intake Air Temperature Sensor signal is out of factory specifications.
OBDII Code P112C Cadillac - Intake Air Temperature Sensor 3 Circuit Low Voltage - AutoCodes.com
P112C Cadillac Code - Intake Air Temperature Sensor 3 Circuit Low Voltage

What are the Possible Causes of the DTC P112C Cadillac?

  • 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 P112C Cadillac?

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 P112C Cadillac 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 P112C Cadillac code?

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Need Help with the Code?

Get the P112C Cadillac 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 P112C Cadillac Code

1. What are common symptoms of OBDII code P112C in a Cadillac related to the Intake Air Temperature Sensor 3 Circuit Low Voltage?

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

2. What are the possible causes of OBDII code P112C in a Cadillac?

The possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, a malfunctioning engine control module (ECM), or issues with the sensor circuit.

3. How can I diagnose the Intake Air Temperature Sensor 3 Circuit Low Voltage issue in my Cadillac?

You can diagnose the problem by performing a visual inspection of the sensor and its wiring, using a multimeter to test for voltage, and checking for any stored trouble codes with an OBDII scanner.

4. Is it safe to continue driving my Cadillac with OBDII code P112C triggered?

It is not recommended to continue driving your Cadillac with this code triggered, as it can lead to further damage to the engine and potentially result in more expensive repairs.

5. How can I repair OBDII code P112C related to the Intake Air Temperature Sensor 3 Circuit Low Voltage in my Cadillac?

To repair the issue, you may need to replace the intake air temperature sensor, repair any damaged wiring or connectors, or reprogram the engine control module (ECM) if necessary.

6. Can a DIY enthusiast fix OBDII code P112C in a Cadillac, or should I take it to a professional mechanic?

While some enthusiasts may have the skills to diagnose and repair this issue, it is recommended to consult with a professional mechanic for accurate diagnosis and proper repair to ensure the problem is resolved correctly.

7. Are there any preventive maintenance steps I can take to avoid OBDII code P112C in my Cadillac?

Regularly inspecting the intake air temperature sensor, keeping the engine well-maintained, and addressing any issues promptly can help prevent the occurrence of OBDII code P112C in your Cadillac.

8. How much can I expect to pay for repairing OBDII code P112C related to the Intake Air Temperature Sensor 3 Circuit Low Voltage in a Cadillac?

The cost of repairs can vary depending on the root cause of the issue, but it may range from $100 to $300 for parts and labor at a professional repair shop.

9. Can a bad intake air temperature sensor cause other problems besides triggering OBDII code P112C in a Cadillac?

Yes, a faulty intake air temperature sensor can cause issues such as poor engine performance, increased emissions, and incorrect air-fuel mixture, leading to potential damage to the engine over time.

10. How long does it typically take to repair OBDII code P112C related to the Intake Air Temperature Sensor 3 Circuit Low Voltage in a Cadillac?

The repair time can vary depending on the extent of the issue and the availability of parts, but it generally takes 1-2 hours for a professional mechanic to diagnose and repair the problem.

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