AutoCodes – GMC – P112B GMC

P112B GMC Code - Intake Air Temperature Sensor 3 Performance

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: P112B GMC indicates Intake Air Temperature Sensor 3 Performance.
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 1,215

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P112B GMC 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 P112B GMC - Intake Air Temperature Sensor 3 Performance - AutoCodes.com — P112B GMC Code - Intake Air Temperature Sensor 3 Performance

What does this mean?

What are the Possible Causes of the DTC P112B GMC?

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 P112B GMC?

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 P112B GMC 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 P112B GMC code?

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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 P112B GMC Code

1. What are the common symptoms of OBDII code P112B GMC (Intake Air Temperature Sensor 3 Performance)?

- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling.

2. What can cause the OBDII code P112B GMC to trigger?

- The code may trigger due to a faulty intake air temperature sensor, wiring issues, or a problem with the sensor circuit.

3. How can I diagnose the issue related to OBDII code P112B GMC?

- To diagnose the problem, you can use a scan tool to read the code, visually inspect the sensor and wiring for damage, and perform resistance tests on the sensor.

4. Is it safe to drive with the OBDII code P112B GMC active?

- It is not recommended to drive with the code active, as it can lead to poor engine performance and potential further damage if left unresolved.

5. Can I reset the OBDII code P112B GMC without fixing the underlying issue?

- While you can reset the code temporarily, it will likely reappear if the root cause of the problem is not addressed.

6. What are some repair tips for fixing OBDII code P112B GMC?

- Repair tips include replacing the intake air temperature sensor, repairing or replacing damaged wiring, and ensuring a proper connection to the sensor.

7. How much does it typically cost to fix OBDII code P112B GMC?

- The cost of fixing the issue can vary depending on the root cause, but it may involve replacing the sensor, which can range from $50 to $200 including parts and labor.

8. Can a DIY enthusiast fix OBDII code P112B GMC?

- DIY enthusiasts with some mechanical knowledge can potentially fix the issue by following repair guides and using the necessary tools for sensor replacement or wiring repairs.

9. Does the OBDII code P112B GMC affect emissions or vehicle safety?

- While the code itself may not directly impact emissions or safety, addressing the underlying issue promptly is important to maintain optimal engine performance and efficiency.

10. How often does the OBDII code P112B GMC occur in GMC vehicles?

- The occurrence of this specific code may vary, but it is not uncommon in GMC vehicles with intake air temperature sensor issues. Regular maintenance and inspections can help prevent such codes from appearing.