AutoCodes – Generic – P146F

P146F Code - EVAP Purge System Pressure Sensor Performance

Quick Answer

The EVAP Purge System Pressure Sensor is a 3-wire piezo-resistive pressure transducer integrated into the Evaporative Emission Purge Pump. 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: P146F indicates EVAP Purge System Pressure Sensor Performance.
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 4,092

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 Sep 13, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P146F Description

The EVAP Purge System Pressure Sensor is a 3-wire piezo-resistive pressure transducer integrated into the Evaporative Emission Purge Pump. It measures pressure within the pump, a critical component of the vehicle's emissions control system. This integration ensures precise pressure measurement for effective emission control, reducing harmful pollutants. The Diagnostic Trouble Code (DTC) will be set when the EVAP Purge Pump Pressure Sensor is not within a calibrated range, unable to re-zero the voltage.

OBDII Code P146F - EVAP Purge System Pressure Sensor Performance - AutoCodes.com — P146F Code - EVAP Purge System Pressure Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P146F?

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 P146F?

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 P146F 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 P146F code?

Need more information on how to fix the P146F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P146F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P146F Buick — EVAP Purge System Pressure Sensor Performance
P146F Cadillac — EVAP Purge System Pressure Sensor Performance
P146F Chevrolet — EVAP Purge System Pressure Sensor Performance
P146F GMC — EVAP Purge System Pressure Sensor Performance

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 P146F Code

1. What are common symptoms of OBDII code P146F (EVAP Purge System Pressure Sensor Performance)?

- Common symptoms include the check engine light coming on, decreased fuel efficiency, and potentially rough engine idling.

2. What are possible causes of OBDII code P146F?

- Potential causes may include a faulty EVAP purge system pressure sensor, a leak in the EVAP system, or issues with the EVAP canister.

3. How can I diagnose the cause of OBDII code P146F?

- Diagnosis typically involves using a scan tool to read the code, checking the EVAP system for leaks, testing the purge system pressure sensor, and inspecting the canister.

4. Can I drive my vehicle with OBDII code P146F?

- It is generally safe to drive the vehicle for a short period with this code, but it is recommended to address the issue promptly to prevent potential damage to the vehicle.

5. How can I repair OBDII code P146F?

- Repair options may include replacing the EVAP purge system pressure sensor, fixing any leaks in the EVAP system, or replacing the EVAP canister if necessary.

6. Is OBDII code P146F an urgent issue?

- While it is not typically considered an urgent issue, addressing the code promptly is recommended to avoid potential negative effects on the vehicle's performance and fuel efficiency.

7. Can a DIY enthusiast fix OBDII code P146F?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to address this code by following repair guides and using the necessary equipment.

8. What happens if OBDII code P146F is ignored?

- Ignoring this code may lead to decreased fuel efficiency, potential damage to the vehicle's emissions system, or further issues with engine performance over time.

9. How long does it take to repair OBDII code P146F?

- The repair time can vary based on the specific cause of the code and the complexity of the repair needed, but it may typically take a few hours to complete.

10. Are there any preventive measures to avoid OBDII code P146F?

- Regularly inspecting the EVAP system for leaks, ensuring proper maintenance of the emissions components, and promptly addressing any check engine light warnings can help prevent this code from occurring.