AutoCodes – GMC – P1468 GMC

P1468 GMC 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 GMC 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 437

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

What does this mean?

What are the Possible Causes of the DTC P1468 GMC?

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 GMC?

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 GMC 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 GMC code?

Need more information on how to fix the P1468 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1468 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P1468 2019 GMC Sierra — EVAP Purge Pump Overspeed
P1468 2020 GMC Sierra — EVAP Purge Pump Overspeed
P1468 2021 GMC Sierra — EVAP Purge Pump Overspeed
P1468 2022 GMC Sierra — EVAP Purge Pump Overspeed

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 GMC Code

1. What are the common symptoms of OBDII code P1468 GMC (EVAP Purge Pump Overspeed)?

- 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 P1468 GMC?

- The code may be triggered by a faulty EVAP purge solenoid, a clogged EVAP canister, a vacuum leak in the EVAP system, or a malfunctioning engine control module (ECM).

3. How can I diagnose OBDII code P1468 GMC?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, followed by inspecting the EVAP system components for any visible damage or leaks.

4. Can a DIY enthusiast repair OBDII code P1468 GMC?

- Depending on the cause, DIY repairs may include replacing the EVAP purge solenoid, clearing obstructions in the EVAP canister, or fixing vacuum leaks. However, professional assistance may be required for more complex issues.

5. How urgent is it to address OBDII code P1468 GMC?

- While the vehicle may still be operable with this code, it is important to address it promptly to prevent potential damage to the engine and ensure optimal fuel efficiency.

6. What are some tips for preventing OBDII code P1468 GMC from reoccurring?

- Regularly inspecting and maintaining the EVAP system, ensuring proper gas cap sealing, and promptly addressing any check engine light warnings can help prevent the code from reoccurring.

7. Can OBDII code P1468 GMC cause other issues with the vehicle?

- If left unresolved, this code can lead to increased emissions, decreased engine performance, and potential damage to the catalytic converter over time.

8. Is it safe to continue driving with OBDII code P1468 GMC?

- While it may be safe to drive in the short term, it is recommended to address the issue as soon as possible to prevent any further complications or damage to the vehicle.

9. How long does it typically take to repair OBDII code P1468 GMC?

- The repair time can vary depending on the exact cause of the code and the complexity of the repair needed. It can range from a quick fix to a more involved repair requiring professional assistance.

10. Can extreme weather conditions affect the triggering of OBDII code P1468 GMC?

- Extreme weather conditions, such as extreme heat or cold, can potentially exacerbate issues within the EVAP system and contribute to the triggering of this code. Regular maintenance can help mitigate these effects.