P1490 2019 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 2019 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.
Code P1490 2019 GMC Sierra Description
What are the Possible Causes of the DTC P1490 2019 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 2019 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 2019 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 2019 GMC Sierra code?
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Frequently Asked Questions about P1490 2019 GMC Sierra Code
What does the OBDII code P1490 mean on a 2019 GMC Sierra?
P1490 indicates an issue with the EVAP Purge Pump Voltage Sensor Performance, meaning the sensor is not reading or functioning as expected.
What are the common symptoms of a P1490 code in a 2019 GMC Sierra?
Symptoms may include an illuminated check engine light, reduced fuel efficiency, difficulty starting the engine, or a noticeable fuel odor.
What causes the P1490 code to appear on a 2019 GMC Sierra?
Possible causes include a faulty EVAP purge pump, damaged wiring or connectors, a malfunctioning voltage sensor, or a problem in the vehicle's PCM.
Can I drive my 2019 GMC Sierra with a P1490 code?
While the vehicle may still be drivable, driving with this code can lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the EVAP system.
How is the P1490 code diagnosed?
A technician will use an OBDII scanner to confirm the code, inspect the EVAP purge pump and voltage sensor, and check for damaged wiring or loose connections in the EVAP system.
What repairs are commonly needed to fix the P1490 code?
Repairs may involve replacing the EVAP purge pump, repairing or replacing damaged wiring or connectors, or replacing the voltage sensor if it's defective.
How much does it typically cost to fix a P1490 code on a 2019 GMC Sierra?
Repair costs vary, but replacing the EVAP purge pump or sensor typically ranges between $150 and $400, depending on labor rates and parts.
Can a loose gas cap cause the P1490 code on a 2019 GMC Sierra?
A loose gas cap is unlikely to cause this specific code but can trigger other EVAP-related codes. Always ensure your gas cap is tightened properly.
Is the P1490 code covered under warranty for a 2019 GMC Sierra?
It depends on your vehicle’s warranty. If the issue is related to emissions components, it might be covered under the federally mandated emissions warranty.
How can I prevent the P1490 code from recurring on my 2019 GMC Sierra?
Regular maintenance of the EVAP system, timely inspection of wiring and connectors, and using high-quality fuel can help prevent this code from recurring.
Discuss the causes and fixes for P1490 2019 GMC Sierra OBDII Code
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