P1490 2021 GMC Sierra Code - EVAP Purge Pump Voltage Sensor Performance
Quick Answer
The P1490 code on a 2021 GMC Sierra indicates a problem with the EVAP (Evaporative Emission Control System) Purge Pump Voltage Sensor performance. Common causes include Faulty EVAP purge pump voltage sensor, Wiring issues or shorts in the EVAP system, Malfunctioning purge pump. 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
- P1490 2021 GMC Sierra indicates EVAP Purge Pump Voltage Sensor Performance.
- Common causes
- Common causes include Faulty EVAP purge pump voltage sensor, Wiring issues or shorts in the EVAP system, Malfunctioning purge pump.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1490 2021 GMC Sierra Description
The P1490 code on a 2021 GMC Sierra indicates a problem with the EVAP (Evaporative Emission Control System) Purge Pump Voltage Sensor performance. The EVAP system is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from escaping into the atmosphere. The purge pump is a key component of this system, as it helps to control the flow of vapors to the engine for combustion.
Common Causes of P1490 2021 GMC Sierra
- Faulty EVAP purge pump voltage sensor
- Wiring issues or shorts in the EVAP system
- Malfunctioning purge pump
- Vacuum leaks in the EVAP system
- Issues with the fuel cap or fuel tank pressure sensor
Symptoms of P1490 2021 GMC Sierra
- Check Engine Light illuminated
- Decreased fuel efficiency
- Rough idling or stalling
- Hesitation or lack of power during acceleration
- Strong fuel odor from the vehicle
How to Fix P1490 2021 GMC Sierra
- Diagnose the specific cause of the P1490 code using a scan tool to pinpoint the issue.
- Inspect the EVAP system components, including the purge pump, sensor, and wiring, for any visible damage or signs of wear.
- Test the purge pump voltage sensor to determine if it is functioning within the specified range.
- Replace any faulty components, such as the sensor, pump, or wiring, as needed.
- Clear the code from the vehicle's computer and perform a test drive to ensure the issue has been resolved.
Cost to Fix P1490 2021 GMC Sierra
The typical repair costs for addressing a P1490 code on a 2021 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $100 to $300, with labor costs adding an additional $100 to $200. Overall, the total repair cost for this issue is likely to fall between $200 and $500. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, labor rates, and the extent of the repairs needed. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.
Need more information about the P1490 2021 GMC Sierra code?
Need more information on how to fix the P1490 2021 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1490 2021 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1490 2021 GMC Sierra Code
1. What are the common symptoms of OBDII code P1490 in a 2021 GMC Sierra?
- Common symptoms include rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.
2. What does the OBDII code P1490 on a 2021 GMC Sierra indicate?
- This code indicates a malfunction related to the EVAP purge pump voltage sensor performance.
3. What are the possible causes of OBDII code P1490 in a 2021 GMC Sierra?
- Possible causes include a faulty EVAP purge pump, damaged wiring or connectors, or a defective voltage sensor.
4. How can I diagnose the issue causing OBDII code P1490 in my 2021 GMC Sierra?
- Diagnosing the issue typically involves checking the EVAP system components, inspecting wiring for damage, and testing the voltage sensor.
5. Can I continue driving my 2021 GMC Sierra with OBDII code P1490?
- It is not recommended to drive with this code present, as it can lead to further damage and potentially affect the vehicle's performance.
6. How can I repair OBDII code P1490 in my 2021 GMC Sierra?
- Repairing this code may involve replacing the EVAP purge pump, repairing damaged wiring, or replacing the voltage sensor as needed.
7. Is it possible to clear OBDII code P1490 in a 2021 GMC Sierra by simply resetting the ECM?
- While resetting the ECM may temporarily clear the code, it is important to diagnose and address the underlying issue to prevent it from reoccurring.
8. Will OBDII code P1490 in a 2021 GMC Sierra cause emissions test failures?
- Yes, this code can cause your vehicle to fail emissions tests due to the malfunction in the EVAP system.
9. How can I prevent OBDII code P1490 from occurring in my 2021 GMC Sierra in the future?
- Regularly inspecting and maintaining the EVAP system, including the purge pump and associated components, can help prevent this code from reoccurring.
10. Are there any recalls or technical service bulletins related to OBDII code P1490 in a 2021 GMC Sierra?
- Check with your local GMC dealership or refer to online resources to see if there are any recalls or technical service bulletins related to this specific code in your vehicle.
Discuss the causes and fixes for P1490 2021 GMC Sierra OBDII Code
Code P1490 2021 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.