Engine-Codes.com
Engine-Codes – Chevrolet – P0099 2018 Chevrolet Silverado

P0099 2018 Chevrolet Silverado Code - Intake Air Temperature Sensor 2 Circuit Intermittent

Quick Answer

The P0099 diagnostic trouble code (DTC) on a 2018 Chevrolet Silverado indicates an issue with the Intake Air Temperature Sensor 2 Circuit being intermittent. Common causes include Loose or corroded electrical connections, Damaged wiring or harness, Faulty Intake Air Temperature 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
P0099 2018 Chevrolet Silverado indicates Intake Air Temperature Sensor 2 Circuit Intermittent.
Common causes
Common causes include Loose or corroded electrical connections, Damaged wiring or harness, Faulty Intake Air Temperature 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0099 2018 Chevrolet Silverado Description

The P0099 diagnostic trouble code (DTC) on a 2018 Chevrolet Silverado indicates an issue with the Intake Air Temperature Sensor 2 Circuit being intermittent. The Intake Air Temperature Sensor (IAT) is a crucial component of the vehicle's engine management system, as it measures the temperature of the air entering the engine. This information is used by the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion and performance.

OBDII Code P0099 2018 Chevrolet Silverado - Intake Air Temperature Sensor 2 Circuit Intermittent
P0099 2018 Chevrolet Silverado Code - Intake Air Temperature Sensor 2 Circuit Intermittent

Common Causes of P0099 2018 Chevrolet Silverado

  1. Loose or corroded electrical connections
  2. Damaged wiring or harness
  3. Faulty Intake Air Temperature Sensor
  4. ECM software issues
  5. Environmental factors such as extreme temperatures affecting sensor performance

Symptoms of P0099 2018 Chevrolet Silverado

  1. Check Engine Light illuminated
  2. Reduced engine performance
  3. Rough idling or stalling
  4. Decreased fuel efficiency
  5. Increased emissions

How to Fix P0099 2018 Chevrolet Silverado

  1. Begin by diagnosing the root cause of the issue using a scan tool to confirm the P0099 code and inspecting the sensor, wiring, and connections for any visible damage.
  2. If the issue is with the sensor itself, replace the Intake Air Temperature Sensor 2 with a new OEM part.
  3. Check and repair any damaged wiring or connections, ensuring a secure and proper electrical connection.
  4. Clear the DTC from the ECM using a scan tool and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0099 2018 Chevrolet Silverado

The typical repair costs for addressing a P0099 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. Replacement Intake Air Temperature Sensors can range from $50 to $150, while labor costs can vary between $80 and $150 per hour. Additional costs may be incurred if wiring repairs or further diagnostics are needed. It's recommended to consult with a certified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for P0099 2018 Chevrolet Silverado

The Intake Air Temperature (IAT) sensor 1, IAT sensor 2, Humidity sensor, MAF sensor, and BARO pressure sensor are integrated within the Mass Air Flow / Multifunction Intake Air Sensor.











User Submitted Video

Need more information about the P0099 2018 Chevrolet Silverado code?

Need more information on how to fix the P0099 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0099 2018 Chevrolet Silverado 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 P0099 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0099 in a 2018 Chevrolet Silverado?

The common symptoms of code P0099 include poor engine performance, reduced fuel efficiency, rough idling, and potential stalling of the vehicle.

2. What does the OBDII code P0099 indicate in a 2018 Chevrolet Silverado?

Code P0099 indicates an issue with the Intake Air Temperature Sensor 2 Circuit, specifically an intermittent electrical problem.

3. What are the possible causes of OBDII code P0099 in a 2018 Chevrolet Silverado?

Possible causes of code P0099 include a faulty Intake Air Temperature Sensor, damaged wiring or connectors, a loose or corroded connection, or issues with the sensor circuit.

4. How can I diagnose the Intake Air Temperature Sensor 2 Circuit intermittently in a 2018 Chevrolet Silverado?

Diagnosing the Intake Air Temperature Sensor 2 Circuit intermittently involves checking the sensor's wiring and connections for any visible damage, testing the sensor for proper functionality, and scanning the vehicle's computer for related error codes.

5. Is it safe to continue driving with OBDII code P0099 in a 2018 Chevrolet Silverado?

It is not recommended to continue driving with code P0099 present, as it can lead to further engine issues and potential damage. It's best to address the problem promptly.

6. Can I repair OBDII code P0099 in a 2018 Chevrolet Silverado myself?

Depending on your mechanical skills, you may be able to address code P0099 yourself by replacing the Intake Air Temperature Sensor, checking and repairing any damaged wiring, or fixing loose connections. However, professional assistance is recommended for accurate diagnosis and repair.

7. How much does it cost to fix OBDII code P0099 in a 2018 Chevrolet Silverado?

The cost of fixing code P0099 can vary depending on the underlying issue. Replacing the Intake Air Temperature Sensor or repairing wiring/connectors may cost between $100 to $300, including parts and labor.

8. Will resetting the OBDII system clear code P0099 in a 2018 Chevrolet Silverado?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It's essential to diagnose and fix the root cause of the problem.

9. Can a dirty air filter cause OBDII code P0099 in a 2018 Chevrolet Silverado?

A dirty air filter is unlikely to directly cause code P0099. However, a clogged air filter can affect the overall engine performance and efficiency, leading to related issues that may trigger the code.

10. How long does it typically take to repair OBDII code P0099 in a 2018 Chevrolet Silverado?

The repair time for code P0099 can vary based on the exact cause of the issue and the complexity of the repair. In general, it may take a few hours to a full day to diagnose and fix the problem.

Discuss the causes and fixes for P0099 2018 Chevrolet Silverado OBDII Code

Submit a New Comment

Code P0099 2018 Chevrolet Silverado comments

No comments found for this page.