AutoCodes – GMC – P1468 2021 GMC Sierra

P1468 2021 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 2021 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 347

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 2021 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 2021 GMC Sierra - EVAP Purge Pump Overspeed - AutoCodes.com — P1468 2021 GMC Sierra Code - EVAP Purge Pump Overspeed

What does this mean?

What are the Possible Causes of the DTC P1468 2021 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 2021 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 2021 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 2021 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 2021 GMC Sierra Code

1. What does OBDII code P1468 on a 2021 GMC Sierra indicate?

- This code, titled EVAP Purge Pump Overspeed, indicates that the engine control module has detected that the purge pump is operating at a speed higher than expected.

2. What are some common symptoms of OBDII code P1468 in a 2021 GMC Sierra?

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

3. What are the potential causes of OBDII code P1468 in a 2021 GMC Sierra?

- Possible causes include a faulty purge valve, a vacuum leak in the EVAP system, a malfunctioning purge pump, or issues with the engine control module.

4. How can I diagnose OBDII code P1468 in my 2021 GMC Sierra?

- Diagnosing this code typically involves using a scan tool to retrieve the specific fault code, checking the EVAP system components for any visible damage, and performing a smoke test to detect leaks.

5. What are some repair tips for resolving OBDII code P1468 on a 2021 GMC Sierra?

- Repair tips may include inspecting and replacing the purge valve, checking and repairing any vacuum leaks in the EVAP system, testing and possibly replacing the purge pump, and resetting the fault code after repairs are completed.

6. Can I continue driving my 2021 GMC Sierra with OBDII code P1468 present?

- It is generally not recommended to drive the vehicle with this code active, as it can lead to further damage and decreased performance. It's best to address the issue promptly.

7. How much does it typically cost to repair OBDII code P1468 in a 2021 GMC Sierra?

- The cost of repair can vary depending on the exact cause of the code and the labor rates of the repair shop. It's advisable to get a diagnosis first to determine the specific repair needed.

8. Is OBDII code P1468 a common issue in 2021 GMC Sierra vehicles?

- While not extremely common, occurrences of this code have been reported in some 2021 GMC Sierra vehicles, typically related to faults in the EVAP system components.

9. Can I clear OBDII code P1468 in my 2021 GMC Sierra without fixing the issue?

- Clearing the code without addressing the underlying problem is not recommended, as the issue may persist and potentially lead to more severe problems down the line. It's best to fix the root cause of the code.

10. How can I prevent OBDII code P1468 from reoccurring in my 2021 GMC Sierra?

- Regularly maintaining and inspecting the EVAP system components, such as the purge valve and purge pump, can help prevent the reoccurrence of this code. Addressing any issues promptly can also help avoid future problems.