Engine-Codes.com
Engine-Codes – Chevrolet – P146A Chevrolet

P146A Chevrolet Code - EVAP Purge Pump Speed Too High

Quick Answer

The P146A code for Chevrolet vehicles indicates that the EVAP purge pump speed is too high. Common causes include Faulty EVAP Purge Pump: The purge pump itself may be malfunctioning, causing it to operate at a speed that is too high, Clogged Purge Valve: A clogged purge valve can restrict the flow of fuel vapor, leading to a high purge pump speed, EVAP System Leak: A leak in the EVAP system can disrupt the flow of fuel vapor, causing the purge pump to work harder to maintain proper operation. 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 Chevrolet indicates EVAP Purge Pump Speed Too High.
Common causes
Common causes include Faulty EVAP Purge Pump: The purge pump itself may be malfunctioning, causing it to operate at a speed that is too high, Clogged Purge Valve: A clogged purge valve can restrict the flow of fuel vapor, leading to a high purge pump speed, EVAP System Leak: A leak in the EVAP system can disrupt the flow of fuel vapor, causing the purge pump to work harder to maintain proper operation.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P146A Chevrolet Description

The P146A code for Chevrolet vehicles indicates that the EVAP purge pump speed is too high. The EVAP (Evaporative Emission Control System) purge pump is responsible for controlling the flow of fuel vapor from the charcoal canister to the engine intake manifold. When the purge pump speed is too high, it means that the pump is operating at a rate that is outside of the normal parameters set by the vehicle's engine control module (ECM).

OBDII Code P146A Chevrolet - EVAP Purge Pump Speed Too High
P146A Chevrolet Code - EVAP Purge Pump Speed Too High

Common Causes of P146A Chevrolet

  1. Faulty EVAP Purge Pump: The purge pump itself may be malfunctioning, causing it to operate at a speed that is too high.
  2. Clogged Purge Valve: A clogged purge valve can restrict the flow of fuel vapor, leading to a high purge pump speed.
  3. EVAP System Leak: A leak in the EVAP system can disrupt the flow of fuel vapor, causing the purge pump to work harder to maintain proper operation.
  4. Malfunctioning ECM: An issue with the engine control module (ECM) can send incorrect signals to the purge pump, resulting in a high speed operation.

Symptoms of P146A Chevrolet

  1. Check Engine Light: The most common symptom associated with the P146A code is the illumination of the check engine light on the vehicle's dashboard.
  2. Decreased Fuel Efficiency: A high purge pump speed can lead to decreased fuel efficiency, as the engine may not be receiving the correct amount of fuel vapor for combustion.
  3. Rough Idle: The engine may experience rough idling or hesitation when the purge pump speed is too high.
  4. Failed Emissions Test: Vehicles with a malfunctioning EVAP system may fail emissions tests due to excess fuel vapor being released into the atmosphere.

How to Fix P146A Chevrolet

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and pinpoint the cause of the high purge pump speed.
  2. Inspect EVAP System: Check for any leaks, clogs, or damage to the EVAP system components, including the purge pump and valve.
  3. Replace Faulty Components: If the purge pump or valve is found to be faulty, replace them with new parts to restore proper operation.
  4. Clear Codes: After making the necessary repairs, clear the trouble codes from the vehicle's ECM to reset the system.
  5. Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the check engine light does not reappear.

Cost to Fix P146A Chevrolet

The typical repair costs for addressing a P146A code on a Chevrolet vehicle can vary depending on the specific cause of the issue and the cost of parts and labor. In general, the cost of replacing a faulty EVAP purge pump or valve can range from $150 to $300, while the cost of diagnosing and repairing an EVAP system leak or malfunctioning ECM can range from $200 to $500. It's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops commonly charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.

Need more information about the P146A Chevrolet code?

Need more information on how to fix the P146A Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P146A Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

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 Chevrolet Code

1. What are the common symptoms of OBDII code P146A in a Chevrolet related to the EVAP purge pump speed being too high?

The common symptoms of OBDII code P146A in a Chevrolet include the check engine light illuminating on the dashboard, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

2. What could be the possible causes of OBDII code P146A indicating the EVAP purge pump speed is too high in a Chevrolet?

Possible causes of OBDII code P146A in a Chevrolet include a faulty EVAP purge pump, a malfunctioning EVAP purge solenoid, a vacuum leak in the EVAP system, or a damaged EVAP canister.

3. How can I diagnose OBDII code P146A in a Chevrolet related to the EVAP purge pump speed being too high?

Diagnosing OBDII code P146A in a Chevrolet involves using an OBDII scanner to retrieve the code, inspecting the EVAP system components for any visible damage or leaks, and testing the functionality of the EVAP purge pump and solenoid.

4. What are some repair tips for fixing OBDII code P146A in a Chevrolet associated with the EVAP purge pump speed being too high?

Repair tips for resolving OBDII code P146A in a Chevrolet may include replacing the faulty EVAP purge pump, repairing any vacuum leaks in the EVAP system, checking and replacing the EVAP purge solenoid if necessary, and clearing the error code with an OBDII scanner.

5. Can driving with OBDII code P146A triggered by the EVAP purge pump speed being too high cause any further damage to my Chevrolet?

Continuing to drive with OBDII code P146A in a Chevrolet can potentially lead to decreased fuel efficiency, increased emissions, and further damage to the vehicle's emissions system over time if left unresolved.

6. Will resetting the error code associated with OBDII code P146A in a Chevrolet fix the issue related to the EVAP purge pump speed being too high?

Simply resetting the error code may temporarily turn off the check engine light, but it will not fix the underlying issue causing OBDII code P146A in a Chevrolet. It is important to diagnose and repair the root cause of the problem.

7. How urgent is it to address OBDII code P146A indicating the EVAP purge pump speed is too high in my Chevrolet?

While OBDII code P146A may not cause immediate drivability issues, it is important to address the problem promptly to prevent further damage to the vehicle's emissions system and ensure optimal performance and fuel efficiency.

8. Are there any preventive maintenance measures I can take to avoid encountering OBDII code P146A in my Chevrolet due to the EVAP purge pump speed being too high?

Regularly inspecting and maintaining the EVAP system components, following the manufacturer's recommended service intervals, and promptly addressing any check engine light warnings can help prevent issues like OBDII code P146A in a Chevrolet.

9. How long does it typically take to repair OBDII code P146A associated with the EVAP purge pump speed being too high in a Chevrolet?

The repair time for OBDII code P146A in a Chevrolet can vary depending on the specific cause of the issue. Simple repairs like replacing the EVAP purge pump or solenoid may take a few hours, while more complex diagnostics and repairs could take longer.

10. Can I fix OBDII code P146A related to the EVAP purge pump speed being too high in my Chevrolet on my own, or should I seek professional help?

While some DIY enthusiasts may be able to address simpler causes of OBDII code P146A in a Chevrolet, it is recommended to seek professional help, especially for complex diagnostics and repairs involving the emissions system to ensure proper resolution and prevent further issues.

Discuss the causes and fixes for P146A Chevrolet OBDII Code

Submit a New Comment

Code P146A Chevrolet comments

No comments found for this page.