P1490 2019 Chevrolet Silverado Code - EVAP Purge Pump Voltage Sensor Performance
Quick Answer
The P1490 diagnostic trouble code (DTC) for a 2019 Chevrolet Silverado indicates a problem with the EVAP purge pump voltage sensor performance. Common causes include Faulty EVAP Purge Pump Voltage Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the PCM, Damaged Wiring or Connectors: Corrosion, damage, or loose connections in the wiring harness or connectors leading to the sensor can cause issues, EVAP Purge Pump Failure: The purge pump itself may be failing, leading to improper fuel vapor flow and triggering the code. 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 Chevrolet Silverado indicates EVAP Purge Pump Voltage Sensor Performance.
- Common causes
- Common causes include Faulty EVAP Purge Pump Voltage Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the PCM, Damaged Wiring or Connectors: Corrosion, damage, or loose connections in the wiring harness or connectors leading to the sensor can cause issues, EVAP Purge Pump Failure: The purge pump itself may be failing, leading to improper fuel vapor flow and triggering the code.
- 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 P1490 2019 Chevrolet Silverado Description
The P1490 diagnostic trouble code (DTC) for a 2019 Chevrolet Silverado indicates a problem with the EVAP purge pump voltage sensor performance. The EVAP (Evaporative Emission Control System) purge pump is responsible for controlling the flow of fuel vapors from the fuel tank to the engine intake manifold for combustion. The voltage sensor monitors the electrical signals from the purge pump to ensure it is functioning correctly.
Common Causes of P1490 2019 Chevrolet Silverado
- Faulty EVAP Purge Pump Voltage Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the PCM.
- Damaged Wiring or Connectors: Corrosion, damage, or loose connections in the wiring harness or connectors leading to the sensor can cause issues.
- EVAP Purge Pump Failure: The purge pump itself may be failing, leading to improper fuel vapor flow and triggering the code.
- Vacuum Leaks: Any leaks in the EVAP system can disrupt the proper functioning of the purge pump and sensor.
- PCM Malfunction: In rare cases, a malfunction in the powertrain control module can also trigger the P1490 code.
Symptoms of P1490 2019 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with the P1490 code is the illumination of the check engine light on the vehicle's dashboard.
- Rough Idle: A faulty EVAP purge pump voltage sensor can cause the engine to idle roughly or inconsistently.
- Decreased Fuel Efficiency: Issues with the EVAP system can lead to decreased fuel efficiency as the engine may not be running optimally.
- Strong Fuel Odor: A malfunctioning EVAP system can result in a strong fuel odor inside and outside the vehicle.
How to Fix P1490 2019 Chevrolet Silverado
- Diagnose the Issue: Use a scan tool to read the DTC and perform a thorough inspection of the EVAP system, including the purge pump, sensor, wiring, and connectors.
- Replace EVAP Purge Pump Voltage Sensor: If the sensor is found to be faulty, replace it with a new one following manufacturer guidelines.
- Repair Wiring or Connectors: Repair any damaged wiring or connectors in the EVAP system to ensure proper electrical connections.
- Test EVAP System: After repairs are made, test the EVAP system to ensure the code does not return and that the vehicle is running smoothly.
- Clear DTC: Use a scan tool to clear the DTC and reset the check engine light.
Cost to Fix P1490 2019 Chevrolet Silverado
The typical repair costs for addressing a P1490 code on a 2019 Chevrolet Silverado can range from $150 to $400, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It's recommended to check local rates for a more accurate estimate.
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Frequently Asked Questions about P1490 2019 Chevrolet Silverado Code
What are the common symptoms of OBDII code P1490 in a 2019 Chevrolet Silverado?
Common symptoms of code P1490 in a 2019 Chevrolet Silverado may include the check engine light illuminating, rough idling, poor engine performance, and potential issues with fuel efficiency.
What are the possible causes of OBDII code P1490 in a 2019 Chevrolet Silverado?
Potential causes of code P1490 in a 2019 Chevrolet Silverado include a faulty EVAP purge pump voltage sensor, damaged wiring or connectors in the purge pump circuit, or a malfunctioning PCM (powertrain control module).
How can I diagnose OBDII code P1490 in a 2019 Chevrolet Silverado?
Diagnosing code P1490 typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the EVAP purge pump voltage sensor and its connections, and testing the sensor's voltage output to determine if it falls within the specified range.
What are the repair options for OBDII code P1490 in a 2019 Chevrolet Silverado?
Repair options for code P1490 may include replacing the EVAP purge pump voltage sensor, repairing or replacing damaged wiring or connectors, and resetting the fault code using an OBDII scanner after the repairs are completed.
Is it safe to continue driving a 2019 Chevrolet Silverado with OBDII code P1490?
It is not recommended to continue driving a vehicle with an active OBDII code like P1490, as it may lead to further damage to the vehicle's emissions system and potentially affect engine performance. It is best to address the issue promptly.
Can I reset OBDII code P1490 in a 2019 Chevrolet Silverado without fixing the underlying problem?
While you can use an OBDII scanner to clear the fault code temporarily, it is crucial to address the root cause of code P1490 in a 2019 Chevrolet Silverado to prevent the issue from reoccurring and potentially causing more significant problems.
How much does it typically cost to repair OBDII code P1490 in a 2019 Chevrolet Silverado?
The cost of repairing code P1490 in a 2019 Chevrolet Silverado can vary depending on the specific issue causing the fault code, the labor rates of the repair shop, and the cost of any parts that need to be replaced. It is advisable to obtain a few quotes from reputable mechanics.
Can a DIY enthusiast fix OBDII code P1490 in a 2019 Chevrolet Silverado?
While some DIY enthusiasts with the necessary tools and experience may be able to diagnose and repair code P1490 themselves, it is recommended to have the expertise of a professional mechanic, especially when dealing with complex electrical systems like the EVAP purge pump circuit.
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