AutoCodesChevrolet – P0099 2017 Chevrolet Silverado

P0099 2017 Chevrolet Silverado Code - Intake Air Temperature Sensor 2 Circuit Intermittent

Quick Answer

The Intake Air Temperature (IAT) sensor 1 is a variable resistor that changes the voltage on the Engine Control Module (ECM) supplied 5 V signal circuit. Common causes include Faulty Intake Air Temperature (IAT) 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
P0099 2017 Chevrolet Silverado indicates Intake Air Temperature Sensor 2 Circuit Intermittent.
Common causes
Common causes include Faulty Intake Air Temperature (IAT) 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 292
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 16, 2022
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Code P0099 2017 Chevrolet Silverado Description

The Intake Air Temperature (IAT) sensor 1 is a variable resistor that changes the voltage on the Engine Control Module (ECM) supplied 5 V signal circuit. The signal varies with inlet air temperature in the sensor bore and is displayed by the scan tool as °C (°F). The IAT sensor 2 and the humidity sensor share the same circuit. The IAT sensor 2 signal is displayed by the scan tool as Hertz (Hz) and °C (°F). The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the IAT sensor 2 signal is intermittent or has abruptly changed for longer than 5 s.
OBDII Code P0099 2017 Chevrolet Silverado - Intake Air Temperature Sensor 2 Circuit Intermittent - AutoCodes.com
P0099 2017 Chevrolet Silverado Code - Intake Air Temperature Sensor 2 Circuit Intermittent

What are the Possible Causes of the DTC P0099 2017 Chevrolet Silverado?

  • Faulty Intake Air Temperature (IAT) sensor
  • Intake Air Temperature sensor harness is open or shorted
  • Intake Air Temperature sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0099 2017 Chevrolet Silverado?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0099 2017 Chevrolet Silverado 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 P0099 2017 Chevrolet Silverado 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 P0099 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0099 on a 2017 Chevrolet Silverado?

- Common symptoms include reduced engine performance, poor fuel efficiency, rough idling, and illuminated Check Engine light.

2. What does the OBDII code P0099 indicate on a 2017 Chevrolet Silverado?

- The code P0099 indicates a fault with the Intake Air Temperature Sensor 2 Circuit, specifically an intermittent issue.

3. What are the possible causes of OBDII code P0099 on a 2017 Chevrolet Silverado?

- Possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, a loose or corroded connection, or a problem with the sensor circuit.

4. How can I diagnose the Intake Air Temperature Sensor 2 Circuit issue causing OBDII code P0099 on my 2017 Chevrolet Silverado?

- You can diagnose the issue by inspecting the sensor and its connections, testing the sensor's resistance, checking for wiring damage, and using a scan tool to monitor sensor data.

5. What are some repair tips for addressing OBDII code P0099 on a 2017 Chevrolet Silverado?

- Repair tips include replacing the intake air temperature sensor if faulty, repairing or replacing damaged wiring or connectors, ensuring all connections are secure, and clearing the trouble codes.

6. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P0099 present?

- It is not recommended to continue driving with OBDII code P0099 present, as it can lead to decreased engine performance and potential further damage if left unresolved.

7. How much does it typically cost to repair OBDII code P0099 on a 2017 Chevrolet Silverado?

- The cost of repairing OBDII code P0099 can vary depending on the exact cause of the issue, but it may involve sensor replacement, wiring repairs, or connector fixes, which could range from $100 to $300 or more.

8. Can a DIY enthusiast fix OBDII code P0099 on a 2017 Chevrolet Silverado?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address OBDII code P0099 by following diagnostic procedures and making necessary repairs like sensor replacement or wiring fixes.

9. How long does it take to repair OBDII code P0099 on a 2017 Chevrolet Silverado?

- The repair time for OBDII code P0099 can vary based on the extent of the issue and the repair needed, but it typically takes anywhere from 1 to 3 hours to diagnose and fix the problem.

10. Are there any recalls or service bulletins related to OBDII code P0099 on a 2017 Chevrolet Silverado?

- It's recommended to check with a Chevrolet dealership or online resources for any relevant recalls or service bulletins related to OBDII code P0099 on a 2017 Chevrolet Silverado to see if there are known issues or remedies provided by the manufacturer.

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