AutoCodes – Buick – P1468 Buick

P1468 Buick 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 Buick 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 321

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

What does this mean?

What are the Possible Causes of the DTC P1468 Buick?

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 Buick?

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 Buick 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.

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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 Buick Code

1. What does the OBDII code P1468 mean for a Buick?

The code P1468 indicates "EVAP Purge Pump Overspeed," meaning the EVAP purge pump is operating faster than expected, potentially due to a system malfunction.

2. What are the symptoms of code P1468 on a Buick?

Common symptoms include the check engine light turning on, poor fuel economy, rough idle, and difficulty passing emissions tests.

3. What causes the P1468 code to appear?

Possible causes include a faulty EVAP purge pump, damaged wiring or connectors, a vacuum leak in the EVAP system, or a malfunctioning EVAP pressure sensor.

4. Can I drive my Buick with the P1468 code?

While the car may still be drivable, ignoring the code can lead to increased emissions and potential damage to the EVAP system over time.

5. How do I diagnose the P1468 code on my Buick?

Start by inspecting the EVAP purge pump, checking for damaged wiring or connectors, testing for vacuum leaks, and using a scan tool to monitor EVAP system operation.

6. How do I fix the P1468 code on my Buick?

Repairs may include replacing the EVAP purge pump, fixing damaged wiring or connectors, sealing any vacuum leaks, or replacing a faulty EVAP pressure sensor.

7. How much does it cost to repair the P1468 code on a Buick?

Repair costs can range from $100 to $400, depending on whether the purge pump or other EVAP components need replacement.

8. Will the P1468 code affect fuel efficiency?

Yes, a malfunctioning EVAP purge system can lead to decreased fuel efficiency and increased emissions.

9. How do I prevent the P1468 code from occurring again?

Regular maintenance of the EVAP system, including checking for leaks and ensuring all components are in good working order, can help prevent this code.

10. Does the P1468 code only apply to Buicks?

No, this code can appear on other vehicles with similar EVAP systems, but the diagnostic and repair process may vary depending on the make and model.