AutoCodes – GMC – P1490 2022 GMC Sierra

P1490 2022 GMC Sierra Code - EVAP Purge Pump Voltage Sensor Performance

Quick Answer

Purge capacity is being reduced by technologies that improve fuel economy. Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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: P1490 2022 GMC Sierra indicates EVAP Purge Pump Voltage Sensor Performance.
Common causes: Common causes include Faulty Evaporative Emission Purge Pump, Evaporative Emission Purge Pump harness is open or shorted, Evaporative Emission Purge Pump 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 305

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 Apr 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1490 2022 GMC Sierra Description

Purge capacity is being reduced by technologies that improve fuel economy. The Evaporative Emission Purge Pump is used to purge stored vapors from the Evaporative Emission Canister and is required to increase the purge volumes to meet LEV 3 Evaporative Emission requirements. The Evaporative Emission Purge Pump has an integral pressure sensor for controlling purge vapors from the canister. The Engine Control Module (ECM) monitors the Evaporative Emission Purge Pump, and the Diagnostic Trouble Code (DTC) will be set when the EVAP Purge Pump Voltage and Ignition Voltage are not within 2.0 V of each other for greater than 1 s.

OBDII Code P1490 2022 GMC Sierra - EVAP Purge Pump Voltage Sensor Performance - AutoCodes.com — P1490 2022 GMC Sierra Code - EVAP Purge Pump Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1490 2022 GMC Sierra?

Faulty Evaporative Emission Purge Pump
Evaporative Emission Purge Pump harness is open or shorted
Evaporative Emission Purge Pump circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1490 2022 GMC Sierra?

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 P1490 2022 GMC Sierra 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 P1490 2022 GMC Sierra code?

Need more information on how to fix the P1490 2022 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 P1490 2022 GMC Sierra Code

1. What does OBDII code P1490 in a 2022 GMC Sierra indicate?

The P1490 code on a 2022 GMC Sierra specifically refers to an issue with the EVAP Purge Pump Voltage Sensor Performance.

2. What are the common symptoms of OBDII code P1490 in a GMC Sierra?

Common symptoms of OBDII code P1490 in a GMC Sierra may include rough idling, decreased fuel efficiency, and the illumination of the check engine light.

3. What are potential causes of OBDII code P1490 in a GMC Sierra?

Potential causes of OBDII code P1490 in a GMC Sierra include a faulty EVAP purge pump, issues with the voltage sensor, wiring problems, or a malfunctioning EVAP system.

4. How can I diagnose the source of OBDII code P1490 in my 2022 GMC Sierra?

Diagnosing the source of OBDII code P1490 involves using an OBDII scanner to retrieve the code, inspecting the EVAP system components, checking the wiring for any damage, and testing the purge pump and voltage sensor.

5. Can I continue driving my GMC Sierra with OBDII code P1490?

It is not recommended to continue driving your GMC Sierra with OBDII code P1490, as the issue could potentially worsen over time and lead to further damage or decreased performance.

6. How can I repair OBDII code P1490 in my 2022 GMC Sierra?

Repairing OBDII code P1490 in a 2022 GMC Sierra may involve replacing the EVAP purge pump, repairing or replacing the voltage sensor, addressing any wiring issues, and clearing the code with an OBDII scanner.

7. Are there any DIY tips for fixing OBDII code P1490 in a GMC Sierra?

While some basic troubleshooting steps can be taken, it is recommended to consult a professional mechanic for proper diagnosis and repair of OBDII code P1490 in a GMC Sierra due to the complexity of the EVAP system.

8. How much does it typically cost to repair OBDII code P1490 in a GMC Sierra?

The cost of repairing OBDII code P1490 in a GMC Sierra can vary depending on the specific issue, parts needed, and labor rates. It is advisable to get a few quotes from reputable repair shops.

9. Can OBDII code P1490 in a 2022 GMC Sierra cause further damage if left untreated?

If left untreated, OBDII code P1490 in a 2022 GMC Sierra can potentially lead to decreased fuel efficiency, increased emissions, and further damage to the EVAP system components.

10. How long does it usually take to repair OBDII code P1490 in a GMC Sierra?

The time required to repair OBDII code P1490 in a GMC Sierra can vary depending on the extent of the issue and the availability of parts. In some cases, the repair may be completed within a few hours, while more complex issues could take longer.