AutoCodes – GMC – P146A 2022 GMC Sierra

P146A 2022 GMC Sierra Code - EVAP Purge Pump Speed Too High

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: P146A 2022 GMC Sierra indicates EVAP Purge Pump Speed Too High.
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 259

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 P146A 2022 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 55,000 RPM for greater than 5 s.

OBDII Code P146A 2022 GMC Sierra - EVAP Purge Pump Speed Too High - AutoCodes.com — P146A 2022 GMC Sierra Code - EVAP Purge Pump Speed Too High

What does this mean?

What are the Possible Causes of the DTC P146A 2022 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 P146A 2022 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 P146A 2022 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 P146A 2022 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 P146A 2022 GMC Sierra Code

1. What are the common symptoms of OBDII code P146A in a 2022 GMC Sierra?

- Common symptoms include the check engine light illuminating, rough idling, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What does the OBDII code P146A on a 2022 GMC Sierra indicate?

- The code P146A indicates that the EVAP purge pump speed is too high, pointing to an issue with the operation of the evaporative emission system in the vehicle.

3. What are possible causes of the EVAP Purge Pump Speed Too High code in a 2022 GMC Sierra?

- Possible causes include a malfunctioning EVAP purge solenoid, a stuck open purge valve, a leak in the EVAP system, or a faulty PCM (powertrain control module).

4. How can I diagnose the OBDII code P146A in my 2022 GMC Sierra?

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

5. Can I continue driving my 2022 GMC Sierra with the P146A code present?

- It is generally not recommended to drive the vehicle with the code active, as it can lead to reduced fuel efficiency and potential damage to the engine or emission control system.

6. How can I repair the OBDII code P146A in my 2022 GMC Sierra?

- Repair methods may include replacing the EVAP purge solenoid, repairing or replacing the purge valve, fixing any leaks in the EVAP system, or reprogramming the PCM if necessary.

7. Will resetting the check engine light resolve the P146A code in a 2022 GMC Sierra?

- Resetting the check engine light may temporarily clear the code, but it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair the EVAP Purge Pump Speed Too High code in a 2022 GMC Sierra?

- The cost of repairs can vary depending on the specific cause of the code, but it may range from $100 to $500 or more, including parts and labor.

9. Is the OBDII code P146A a common issue in 2022 GMC Sierra vehicles?

- While the P146A code may not be as common as some other codes, it can still occur in 2022 GMC Sierra models due to various issues with the EVAP system components.

10. Can I prevent the OBDII code P146A from appearing in my 2022 GMC Sierra?

- Regular maintenance, such as checking and replacing the EVAP system components as needed, can help prevent the occurrence of the P146A code in your GMC Sierra.