AutoCodes – Buick – P146F Buick

P146F Buick 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 Buick 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 1,154

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

What does this mean?

What are the Possible Causes of the DTC P146F 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 P146F 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 P146F 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 P146F Buick Code

1. What are common symptoms of OBDII code P146F in a Buick related to the EVAP Purge System Pressure Sensor?

- Common symptoms include rough idling, decreased fuel efficiency, and the illumination of the check engine light.

2. What are possible causes of OBDII code P146F in a Buick?

- Possible causes may include a faulty EVAP purge system pressure sensor, a vacuum leak in the evaporative emissions system, or a damaged wiring harness.

3. How can I diagnose OBDII code P146F in my Buick?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, conducting a visual inspection of the EVAP system components, and testing the purge system pressure sensor.

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

- It is generally not recommended to drive the vehicle with this code, as it can lead to decreased performance and potential damage to the engine or emissions system.

5. How can I repair OBDII code P146F in a Buick?

- Repair steps may include replacing the EVAP purge system pressure sensor, repairing any vacuum leaks, clearing the code with an OBDII scanner, and testing the system for proper operation.

6. Is it possible to prevent OBDII code P146F from occurring in my Buick?

- Regular maintenance, such as inspecting and replacing worn components in the EVAP system, can help prevent the occurrence of this code.

7. Can a DIY enthusiast fix OBDII code P146F in a Buick?

- While some may be able to diagnose and replace the necessary components themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair.

8. How much does it typically cost to repair OBDII code P146F in a Buick?

- Repair costs can vary depending on the specific issue causing the code, but they may range from $100 to $300 for parts and labor.

9. Will OBDII code P146F cause my Buick to fail an emissions test?

- Yes, this code is related to the emissions control system, and if not addressed, it can cause the vehicle to fail an emissions test.

10. How long does it take to repair OBDII code P146F in a Buick?

- The repair time can vary based on the exact cause of the code and the availability of parts, but it typically takes a few hours to complete the repair.