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Engine-Codes – Chevrolet – P1490 2020 Chevrolet Silverado

P1490 2020 Chevrolet Silverado Code - EVAP Purge Pump Voltage Sensor Performance

Quick Answer

The P1490 code on a 2020 Chevrolet Silverado refers to an issue with the EVAP purge pump voltage sensor performance. Common causes include Faulty EVAP purge pump voltage sensor, Wiring or electrical connection issues, EVAP system leaks or blockages. 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 2020 Chevrolet Silverado indicates EVAP Purge Pump Voltage Sensor Performance.
Common causes
Common causes include Faulty EVAP purge pump voltage sensor, Wiring or electrical connection issues, EVAP system leaks or blockages.
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 08, 2024
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Code P1490 2020 Chevrolet Silverado Description

The P1490 code on a 2020 Chevrolet Silverado refers to an issue with the EVAP purge pump voltage sensor performance. This indicates that the vehicle's onboard diagnostics system has detected a problem with the sensor responsible for monitoring the voltage of the EVAP purge pump. The EVAP (Evaporative Emission Control) system is designed to prevent harmful fuel vapors from escaping into the atmosphere. The purge pump is a crucial component of this system, as it helps to control the flow of fuel vapor from the charcoal canister to the engine for combustion.

OBDII Code P1490 2020 Chevrolet Silverado - EVAP Purge Pump Voltage Sensor Performance
P1490 2020 Chevrolet Silverado Code - EVAP Purge Pump Voltage Sensor Performance

Common Causes of P1490 2020 Chevrolet Silverado

  1. Faulty EVAP purge pump voltage sensor
  2. Wiring or electrical connection issues
  3. EVAP system leaks or blockages
  4. Malfunctioning EVAP purge pump
  5. Issues with the vehicle's computer system

Symptoms of P1490 2020 Chevrolet Silverado

  1. Rough idling or stalling of the engine
  2. Decreased fuel efficiency
  3. Check Engine Light illuminated on the dashboard
  4. Failed emissions test
  5. Strong fuel odor coming from the vehicle

How to Fix P1490 2020 Chevrolet Silverado

  1. Perform a thorough diagnostic scan to retrieve the trouble codes and pinpoint the exact cause of the issue.
  2. Inspect the EVAP purge pump voltage sensor, wiring, and connections for any signs of damage or wear.
  3. Test the EVAP purge pump functionality and replace it if necessary.
  4. Clear the trouble codes from the vehicle's computer system and reset the Check Engine Light.
  5. Perform a test drive to ensure that the issue has been resolved and that the vehicle's performance is back to normal.

Cost to Fix P1490 2020 Chevrolet Silverado

The typical repair costs for addressing a P1490 code on a 2020 Chevrolet Silverado can vary depending on the exact cause of the issue. On average, the cost of parts for replacing a faulty EVAP purge pump voltage sensor can range from $100 to $200. Labor costs can vary between $100 to $200, depending on the shop's hourly rates and the complexity of the repair. Overall, the total repair cost for resolving this issue may fall between $200 and $400. It's recommended to consult with a trusted auto repair shop for a precise estimate based on the specific circumstances of the vehicle.

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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 P1490 2020 Chevrolet Silverado Code

1. What does OBDII code P1490 on a 2020 Chevrolet Silverado indicate?

The code P1490 indicates a problem with the EVAP Purge Pump Voltage Sensor Performance in the vehicle's evaporative emission control system.

2. What are the common symptoms of OBDII code P1490 on a 2020 Chevrolet Silverado?

Common symptoms of code P1490 may include rough idling, decreased fuel efficiency, and the illumination of the check engine light on the dashboard.

3. What are some possible causes of OBDII code P1490 on a 2020 Chevrolet Silverado?

Potential causes of code P1490 can include a faulty EVAP purge pump, damaged wiring or connectors in the EVAP system, or a malfunctioning EVAP purge pump voltage sensor.

4. How can I diagnose the issue related to OBDII code P1490 on a 2020 Chevrolet Silverado?

To diagnose the problem, it is recommended to use an OBDII scanner to retrieve the specific trouble code, inspect the EVAP system components for any visible damage, and test the EVAP purge pump voltage sensor for proper functionality.

5. Can I continue driving my 2020 Chevrolet Silverado with OBDII code P1490?

While the vehicle may still be operable with the code P1490 present, it is recommended to address the issue promptly to prevent potential damage to the emissions control system and ensure optimal engine performance.

6. How can I repair OBDII code P1490 on a 2020 Chevrolet Silverado?

Repairing code P1490 may involve replacing the EVAP purge pump, repairing or replacing damaged wiring or connectors, or replacing the EVAP purge pump voltage sensor based on the specific diagnosis of the issue.

7. Is it necessary to reset the OBDII code P1490 after making repairs on a 2020 Chevrolet Silverado?

Yes, it is important to clear the trouble code using an OBDII scanner after completing the repairs related to code P1490 to reset the check engine light and monitor the system for any recurring issues.

8. How much should I expect to pay for repairing OBDII code P1490 on a 2020 Chevrolet Silverado?

The cost of repairing code P1490 can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor charges.

9. Are there any preventive maintenance tips to avoid OBDII code P1490 on a 2020 Chevrolet Silverado?

To prevent code P1490, it is advisable to perform regular inspections of the EVAP system components, maintain proper fuel cap sealing, and address any issues related to the evaporative emission control system promptly.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1490 on a 2020 Chevrolet Silverado?

While some repairs related to code P1490 may be performed by individuals with basic automotive knowledge and tools, it is recommended to consult a professional mechanic for a proper diagnosis and repair to ensure the issue is resolved correctly.

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