AutoCodes – Buick – P148E Buick

P148E Buick Code - EVAP Purge Pump Voltage Sensor Low Voltage

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: P148E Buick indicates EVAP Purge Pump Voltage Sensor Low Voltage.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 287

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P148E 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 Voltage is less than 3.5 V for greater than 1 s.

OBDII Code P148E Buick - EVAP Purge Pump Voltage Sensor Low Voltage - AutoCodes.com — P148E Buick Code - EVAP Purge Pump Voltage Sensor Low Voltage

What does this mean?

What are the Possible Causes of the DTC P148E 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 P148E 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 P148E 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.

Need more information about the P148E Buick code?

Need more information on how to fix the P148E Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P148E Buick code diagnosed by a professional: Find a repair shop in your area

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 P148E Buick Code

1. What does OBDII code P148E mean on a Buick?

Code P148E indicates that the EVAP Purge Pump Voltage Sensor is detecting a low voltage condition, which could affect the vehicle's evaporative emissions system.

2. What are the common symptoms of P148E on a Buick?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, difficulty starting the engine, or a noticeable fuel smell near the vehicle.

3. What causes the P148E code to appear on a Buick?

Common causes include a faulty EVAP purge pump, damaged or corroded wiring, a bad voltage sensor, or a malfunctioning powertrain control module (PCM).

4. How do I diagnose the P148E code on my Buick?

Start by inspecting the EVAP purge pump and its wiring for damage, use a multimeter to check voltage levels, and scan the PCM for additional codes to rule out related issues.

5. Can I drive my Buick with the P148E code?

While the vehicle may still be drivable, itâ€™s not recommended as the issue can lead to increased emissions, decreased fuel efficiency, and potential long-term damage to the EVAP system.

6. How do I fix the P148E code on a Buick?

Repairs may involve replacing the EVAP purge pump, repairing damaged wiring, cleaning electrical connectors, or reprogramming the PCM if necessary.

7. How much does it cost to fix code P148E on a Buick?

Repair costs can range from $100 to $400 depending on whether the issue is related to the EVAP purge pump, wiring, or the PCM.

8. Can a faulty gas cap cause the P148E code on a Buick?

A loose or faulty gas cap is unlikely to directly cause P148E, but it can lead to related EVAP system issues. Always check the gas cap first as a precaution.

9. How can I prevent the P148E code from recurring on my Buick?

Regularly inspect and maintain the EVAP system components, ensure electrical connections are clean and secure, and address any check engine lights promptly.

10. Is a professional mechanic required to fix the P148E code on a Buick?

While some issues like inspecting wiring can be done by DIYers, diagnosing and replacing components like the EVAP purge pump or reprogramming the PCM may require professional assistance.