AutoCodes – GMC – P1468 2019 GMC Sierra

P1468 2019 GMC Sierra Code - EVAP Purge Pump Overspeed

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: P1468 2019 GMC Sierra indicates EVAP Purge Pump Overspeed.
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 265

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 P1468 2019 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 Speed is greater than 240 RPM when commanded off for greater than 5 s.

OBDII Code P1468 2019 GMC Sierra - EVAP Purge Pump Overspeed - AutoCodes.com — P1468 2019 GMC Sierra Code - EVAP Purge Pump Overspeed

What does this mean?

What are the Possible Causes of the DTC P1468 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 P1468 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 P1468 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 P1468 2019 GMC Sierra 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 P1468 2019 GMC Sierra Code

1. What does the OBDII code P1468 mean on a 2019 GMC Sierra?

P1468 indicates an "EVAP Purge Pump Overspeed" issue, meaning the purge pump in the evaporative emissions system is operating faster than expected.

2. What are the symptoms of P1468 on a 2019 GMC Sierra?

Common symptoms include an illuminated check engine light, possible fuel odor, and reduced fuel efficiency. In some cases, there may be no noticeable symptoms.

3. What causes the P1468 code on a GMC Sierra?

Possible causes include a faulty EVAP purge pump, a damaged or restricted purge line, a failing EVAP pressure sensor, or electrical issues like a bad connection or wiring fault in the purge pump circuit.

4. How serious is the P1468 code?

While not an immediate safety concern, the code can lead to increased emissions and potentially cause issues during an emissions inspection. It should be addressed promptly to avoid further damage.

5. Can I drive my 2019 GMC Sierra with the P1468 code?

Yes, the vehicle is generally safe to drive, but prolonged driving with this issue may lead to worsened fuel efficiency and emissions problems.

6. How is the P1468 code diagnosed?

A mechanic will typically use a scan tool to confirm the code, inspect the EVAP system components, check for vacuum leaks or blockages, and test the purge pump and related wiring.

7. How can I fix the P1468 code?

Repairs may involve replacing the EVAP purge pump, clearing blockages in the purge lines, fixing wiring issues, or replacing a faulty EVAP pressure sensor.

8. What tools are needed to fix the P1468 code?

Tools like an OBDII scanner, a multimeter for electrical tests, and vacuum line testing equipment may be necessary for diagnosing and repairing this code.

9. How much does it cost to fix the P1468 code on a GMC Sierra?

Repair costs can range from $100 to $400, depending on whether the issue involves replacing the purge pump, fixing wiring, or addressing other components.

10. Can I fix the P1468 code on my own?

If you have the tools and experience, you can inspect the EVAP system for blockages or damaged components. However, more complex repairs like pump replacement or wiring fixes may require professional help.