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P1467 2020 GMC Sierra Code - EVAP Purge Pump Underspeed

Quick Answer

The P1467 code on a 2020 GMC Sierra indicates a problem with the EVAP (Evaporative Emission Control System) purge pump underspeed. Common causes include Faulty Purge Pump: The purge pump itself may be defective or worn out, leading to underspeed operation, Wiring Issues: Electrical problems such as damaged wiring or connectors can disrupt the communication between the purge pump and the vehicle's computer, Vacuum Leaks: Any leaks in the vacuum lines connected to the purge pump can affect its operation and trigger the P1467 code. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P1467 2020 GMC Sierra indicates EVAP Purge Pump Underspeed.
Common causes
Common causes include Faulty Purge Pump: The purge pump itself may be defective or worn out, leading to underspeed operation, Wiring Issues: Electrical problems such as damaged wiring or connectors can disrupt the communication between the purge pump and the vehicle's computer, Vacuum Leaks: Any leaks in the vacuum lines connected to the purge pump can affect its operation and trigger the P1467 code.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P1467 2020 GMC Sierra Description

The P1467 code on a 2020 GMC Sierra indicates a problem with the EVAP (Evaporative Emission Control System) purge pump underspeed. The EVAP system is responsible for capturing and storing fuel vapors to prevent them from escaping into the atmosphere. The purge pump is a crucial component of this system, as it helps to control the flow of fuel vapors from the charcoal canister to the engine intake for combustion.

OBDII Code P1467 2020 GMC Sierra - EVAP Purge Pump Underspeed
P1467 2020 GMC Sierra Code - EVAP Purge Pump Underspeed

Common Causes of P1467 2020 GMC Sierra

  1. Faulty Purge Pump: The purge pump itself may be defective or worn out, leading to underspeed operation.
  2. Wiring Issues: Electrical problems such as damaged wiring or connectors can disrupt the communication between the purge pump and the vehicle's computer.
  3. Vacuum Leaks: Any leaks in the vacuum lines connected to the purge pump can affect its operation and trigger the P1467 code.
  4. EVAP System Blockage: Blockages in the EVAP system, such as a clogged charcoal canister or purge valve, can impede the flow of fuel vapors and cause the purge pump to operate at underspeed.

Symptoms of P1467 2020 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P1467 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A malfunctioning EVAP purge pump can lead to increased fuel consumption due to improper fuel vapor management.
  3. Rough Idle: The engine may experience rough idling or hesitation during acceleration as a result of the underspeed purge pump.
  4. Strong Fuel Odor: A noticeable fuel odor inside or outside the vehicle can indicate a problem with the EVAP system, including the purge pump.

How to Fix P1467 2020 GMC Sierra

  1. Diagnose the Issue: Use an OBD-II scanner to retrieve the trouble code and perform a thorough inspection of the EVAP system components, including the purge pump, wiring, and vacuum lines.
  2. Replace Purge Pump: If the purge pump is found to be faulty, replace it with a new OEM or high-quality aftermarket unit.
  3. Repair Wiring: Address any damaged wiring or connectors in the EVAP system to ensure proper electrical connections.
  4. Clear Codes: After completing the repair, clear the trouble codes from the vehicle's computer using the OBD-II scanner to reset the check engine light.
  5. Perform EVAP System Test: Conduct an EVAP system test to verify that the purge pump is now operating at the correct speed and that there are no remaining issues.

Cost to Fix P1467 2020 GMC Sierra

The cost of repairing a P1467 code on a 2020 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing the EVAP purge pump can cost between $150 and $300 for the part, with additional labor costs ranging from $100 to $200. Overall, the total repair cost for this issue may fall between $250 and $500. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple sources to ensure a competitive price.

What does this mean?

Tech Notes for P1467 2020 GMC Sierra

Some 2019-2020 Chevrolet Silverado and GMC Sierra with 2.7L engine may have the Service Engine Soon (SES) Warning Light ON with Diagnostic Trouble Code (DTC) P1467 and/or P1469 set in the Engine Control Module (ECM). The cause is the Evaporative Emission Purge Pump may be filling with liquid fuel due to overfilling the fuel tank. There is a Factory Service Bulletin for this issue, the dealer will inspect the vehicle and replace the Evaporative Emission Purge Pump.

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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 P1467 2020 GMC Sierra Code

1. What are the common symptoms of OBDII code P1467 on a 2020 GMC Sierra related to the EVAP purge pump underspeed?

- Common symptoms include rough idling, stalling, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P1467 on a 2020 GMC Sierra?

- Potential causes may include a faulty EVAP purge solenoid, a clogged purge line, a malfunctioning EVAP purge pump, or issues with the wiring or connectors.

3. How can I diagnose OBDII code P1467 on my 2020 GMC Sierra?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the EVAP system components for damage or leaks, and testing the purge pump and solenoid for proper operation.

4. What are some repair tips for addressing OBDII code P1467 on a 2020 GMC Sierra?

- Repair tips may include checking and replacing the EVAP purge pump, inspecting and clearing any obstructions in the purge line, testing and replacing the purge solenoid if necessary, and ensuring all connections are secure.

5. Can I continue driving my 2020 GMC Sierra with OBDII code P1467 present?

- It is generally not recommended to continue driving with this code present, as it can lead to potential issues with the vehicle's performance and emissions. It's best to address the underlying problem promptly.

6. How much does it typically cost to repair OBDII code P1467 on a 2020 GMC Sierra?

- The cost of repairs can vary depending on the exact cause of the issue and whether you choose to address it yourself or take it to a professional mechanic. Costs may range from a few hundred to over a thousand dollars.

7. Is OBDII code P1467 a serious issue on a 2020 GMC Sierra?

- While not an immediate emergency, ignoring OBDII code P1467 can lead to further damage to the EVAP system and potentially affect the vehicle's overall performance and emissions. It is recommended to address the issue promptly.

8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1467 on a 2020 GMC Sierra?

- Depending on the specific cause, a DIY enthusiast with basic automotive knowledge may be able to address OBDII code P1467 by following repair guides, replacing components, and ensuring proper diagnostics are performed.

9. How long does it typically take to repair OBDII code P1467 on a 2020 GMC Sierra?

- The repair time can vary based on the complexity of the issue, the availability of parts, and whether you are performing the repairs yourself or taking it to a mechanic. It can range from a few hours to a day or more.

10. Are there any preventative measures to avoid OBDII code P1467 on a 2020 GMC Sierra in the future?

- Regularly inspecting and maintaining the EVAP system components, checking for leaks or damage, and promptly addressing any issues with the purge pump or solenoid can help prevent OBDII code P1467 from occurring in the future.

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